CCNA AI and Network Operations Practice Test 8 — 15 Questions

Question 1

What is a northbound API in a controller-based network architecture?

Accepted Answer

An interface used by applications to communicate with the controller. Northbound APIs allow external applications, dashboards, and automation tools to interact with the controller. Southbound APIs are used by the controller to communicate with the network devices it manages.

Answer

An interface used by the controller to program forwarding tables on switches

Answer

A dedicated out-of-band management port on the controller

Answer

A wireless uplink between access points and the controller

Question 2

Which HTTP method is commonly used to retrieve information from a REST API without modifying the resource?

Accepted Answer

GET. GET is the standard HTTP method for retrieving a resource representation without changing the resource.

Answer

POST

Answer

PUT

Answer

DELETE

Question 3

Which two tasks are strong candidates for network automation? (Choose two.)

Accepted Answer

Polling many devices for interface status on a schedule. Automation works best for repetitive, rule-based tasks such as gathering state information or pushing standard configuration changes across many devices.

Answer

Replacing a failed power supply in a branch switch

Answer

Tracing one cable through a crowded rack by hand

Answer

Listening for fan noise in a wiring closet

Question 4

Why are data models such as YANG important in network automation?

Accepted Answer

They define a structured way to represent configuration and state data. Data models such as YANG standardize how configuration and operational data are described, which improves consistency for automation systems and APIs.

Answer

They replace IPv4 and IPv6 addressing

Answer

They remove the need for routing protocols

Answer

They are used only for naming wireless SSIDs

Question 5

Given the JSON snippet below, what is the value of hostname?

{
  "device": {
    "hostname": "R1",
    "mgmt_ip": "192.0.2.10"
  }
}

Accepted Answer

R1. The key hostname inside the device object has the value R1.

Answer

device

Answer

hostname

Answer

192.0.2.10

Question 6

Which data format is commonly used with REST APIs to represent objects, arrays, and key-value pairs?

Accepted Answer

JSON. JSON is a common data-interchange format used in APIs and automation systems.

Answer

STP

Answer

EIGRP

Answer

802.1Q

Question 7

Which HTTP method is typically used to retrieve data from a REST API without modifying the resource?

Accepted Answer

GET. GET requests are used to retrieve resource information. They are intended for read operations rather than creation, replacement, or deletion.

Answer

POST

Answer

PUT

Answer

DELETE

Question 8

Which pairing is correct?

Accepted Answer

RESTCONF — protocol that can use YANG-defined data models over HTTP-based access. RESTCONF is an HTTP-based API approach that commonly uses YANG-defined data models. JSON is a data-interchange format, YANG is the data modeling language, and NETCONF is a network management protocol rather than an STP feature.

Answer

JSON — data modeling language used to define network schemas such as YANG modules

Answer

YANG — lightweight interchange format built from curly braces and arrays

Answer

NETCONF — spanning-tree enhancement for rapid convergence

Question 9

Which tool type is most appropriate for turning a variable set of interface values into a reusable configuration template?

Accepted Answer

A templating engine. A templating engine allows you to create a reusable configuration pattern and populate it with variable values, making it ideal for turning variable interface values into templates. A packet sniffer captures network traffic and analyzes packets but does not generate configuration templates. A DNS recursive resolver translates domain names to IP addresses, which is unrelated to configuration templating. An STP root bridge manages loop-free topology in a switched network, not template creation.

Answer

A packet sniffer

Answer

A DNS recursive resolver

Answer

An STP root bridge

Question 10

What is version control primarily used for in network automation workflows?

Accepted Answer

To track changes and maintain history for code and templates. Version control tracks changes to code and configuration artifacts, enabling rollback, collaboration, and auditability.

Answer

To replace authentication for API clients

Answer

To automatically assign switchport VLANs in real time

Answer

To discover neighboring devices at Layer 2

Question 11

Which two statements about RESTful APIs are correct? (Choose two.)

Accepted Answer

They commonly use HTTP methods such as GET and POST.. REST commonly uses HTTP verbs and typically exchanges structured data such as JSON.

Answer

They require Layer 2 adjacency between client and server.

Answer

They replace the need for routing protocols on the network.

Question 12

A REST API query returns this JSON snippet:

{
  "interface": {
    "name": "GigabitEthernet1",
    "admin-status": "up",
    "oper-status": "down"
  }
}

What does this indicate?

Accepted Answer

The interface is enabled but the link is not operational.. The interface is administratively enabled, but it is not operationally passing traffic or achieving link.

Answer

The interface is shut down by configuration.

Answer

The interface is operating normally.

Answer

The interface is a loopback.

Question 13

What data format is commonly used in REST API responses because it is lightweight and easy for applications to parse?

Accepted Answer

JSON. JSON is widely used in REST APIs for structured data exchange.

Answer

BGP

Answer

STP

Answer

ARP

Question 14

In a controller-based network architecture, what is a southbound API typically used for?

Accepted Answer

To communicate from the controller to network devices. Southbound APIs are used by the controller to communicate with and program network devices or the infrastructure below it.

Answer

To provide dashboards to end users in a browser

Answer

To translate DNS names into IP addresses

Answer

To synchronize switch clocks with NTP

Question 15

Which two practices most improve safety when automating network changes? (Choose two.)

Accepted Answer

Testing changes in a lab or staging environment first. Testing and validation reduce risk before wide deployment, and version control with review/rollback supports controlled operations.

Answer

Running scripts directly in production without validation

Answer

Disabling backups so changes apply faster