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Chapter 41 — Network Automation and APIs

A complete networking lesson based on the course chapter menu.

40 topicsPractical examplesTroubleshooting checksReview Q&A

Estimated reading time0% read

Chapter 41: Network Automation and APIs

This chapter follows the topics shown in the Networking chapter menu. Work through each section in order, then use the review questions to check recall and troubleshooting reasoning.

41.1 Network Automation

Network Automation is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Network Automation in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Network Automation without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.2 Automation Benefits

Automation Benefits is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Automation Benefits in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Automation Benefits without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.3 Human Error Reduction

Human Error Reduction is a troubleshooting condition. The useful approach is to confirm symptoms, determine scope, identify the relevant layer, compare actual values with the intended design, test one theory at a time, and verify service after the fix.

Example: place Human Error Reduction in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Confirm the symptom and determine whether the problem affects one host, one segment, one site, or many sites.
Compare actual configuration and measurements with the intended design, baseline, or documentation.
Change one variable at a time, verify the result, and document both the cause and the final fix.

Practice: Practice: explain Human Error Reduction without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.4 Repeatability

Repeatability is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Repeatability in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Repeatability without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.5 Configuration Management

Configuration Management is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Configuration Management in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Configuration Management without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.6 Desired State

Desired State is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Desired State in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Desired State without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.7 Configuration Drift

Configuration Drift is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Configuration Drift in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Configuration Drift without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.8 Templates

Templates is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Templates in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Templates without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.9 Infrastructure as Code

Infrastructure as Code is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Infrastructure as Code in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

interface: uplink1
enabled: true
description: WAN uplink

Practice: Practice: explain Infrastructure as Code without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.10 Declarative Configuration

Declarative Configuration is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Declarative Configuration in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Declarative Configuration without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.11 Imperative Configuration

Imperative Configuration is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Imperative Configuration in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Imperative Configuration without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.12 APIs

APIs is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place APIs in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

GET /api/v1/interfaces
Accept: application/json

Practice: Practice: explain APIs without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.13 REST APIs

REST APIs is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place REST APIs in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

GET /api/v1/interfaces
Accept: application/json

Practice: Practice: explain REST APIs without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.14 GET

GET is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place GET in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain GET without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.15 POST

POST is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place POST in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain POST without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.16 PUT

PUT is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place PUT in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain PUT without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.17 PATCH

PAT lets many inside hosts share one or a small number of public IPv4 addresses by tracking transport protocol and port mappings.

Example: place PATCH in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain PATCH without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.18 DELETE

DELETE is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place DELETE in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain DELETE without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.19 API Endpoints

API Endpoints is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place API Endpoints in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

GET /api/v1/interfaces
Accept: application/json

Practice: Practice: explain API Endpoints without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.20 API Authentication

API Authentication is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place API Authentication in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

GET /api/v1/interfaces
Accept: application/json

Practice: Practice: explain API Authentication without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.21 Tokens

Tokens is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Tokens in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Tokens without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.22 JSON

JSON is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place JSON in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

{
  "interface": "uplink1",
  "enabled": true,
  "description": "WAN uplink"
}

Practice: Practice: explain JSON without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.23 XML

XML is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place XML in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain XML without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.24 YAML

YAML is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place YAML in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

interface: uplink1
enabled: true
description: WAN uplink

Practice: Practice: explain YAML without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.25 Network Controllers

Network Controllers is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Network Controllers in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Network Controllers without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.26 SDN

SDN is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place SDN in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain SDN without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.27 Control Plane

Control Plane is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Control Plane in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Control Plane without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.28 Data Plane

Data Plane is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Data Plane in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Data Plane without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.29 Management Plane

Management Plane is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Management Plane in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Management Plane without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.30 Northbound APIs

Northbound APIs is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Northbound APIs in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

GET /api/v1/interfaces
Accept: application/json

Practice: Practice: explain Northbound APIs without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.31 Southbound Interfaces

Southbound Interfaces is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Southbound Interfaces in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Southbound Interfaces without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.32 Overlay Networks

Overlay Networks is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Overlay Networks in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Overlay Networks without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.33 Underlay Networks

Underlay Networks is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Underlay Networks in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Underlay Networks without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.34 Orchestration

Orchestration is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Orchestration in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Orchestration without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.35 Version Control

Version Control is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Version Control in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Version Control without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.36 Idempotency

Idempotency is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Idempotency in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Idempotency without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.37 Automated Remediation

Automated Remediation is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Automated Remediation in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Automated Remediation without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.38 API Status Codes

API Status Codes is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place API Status Codes in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Command or data example

GET /api/v1/interfaces
Accept: application/json

Practice: Practice: explain API Status Codes without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.39 Secrets Management

Secrets Management is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place Secrets Management in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain Secrets Management without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

41.40 CMDB and Source of Truth

CMDB and Source of Truth is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

Example: place CMDB and Source of Truth in a small office network containing clients, switches, a router, wireless access, DNS/DHCP services, and an internet connection. Identify which device or layer owns the function and what evidence you would inspect to verify it.

What to check

Identify which OSI/TCP-IP layer and device type are primarily responsible.
Check configuration, interface or service state, counters, logs, and a simple end-to-end test.
Verify both normal operation and one realistic failure case so you understand what changes when the feature breaks.

Practice: Practice: explain CMDB and Source of Truth without reading the definition. Then draw or describe one network where it is used, name one failure symptom, and list the first two checks you would perform.

Chapter 41 Review Questions

1. What should you remember about Network Automation?

Answer: Network Automation is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

2. What should you remember about Configuration Management?

Answer: Configuration Management is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

3. What should you remember about Declarative Configuration?

Answer: Declarative Configuration is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

4. What should you remember about GET?

Answer: GET is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

5. What should you remember about DELETE?

Answer: DELETE is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

6. What should you remember about XML?

Answer: XML is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

7. What should you remember about Control Plane?

Answer: Control Plane is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

8. What should you remember about Southbound Interfaces?

Answer: Southbound Interfaces is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

9. What should you remember about Idempotency?

Answer: Idempotency is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.

10. What should you remember about CMDB and Source of Truth?

Answer: CMDB and Source of Truth is one of the core topics in Network Automation and APIs. Understand what the term represents, where it operates in the network, what information it uses, and what observable behavior confirms that it is working correctly.