200-901 Practice Test 5 — 10 Questions

Question 1

Which three of the following are common data formats used with REST APIs on Cisco platforms?

Accepted Answer

JSON. JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that is natively supported by most programming languages and REST APIs. Cisco platforms, such as Cisco DNA Center and Cisco Meraki, use JSON as the primary data format for API requests and responses because it is easy to parse and has a compact structure. JSON's key-value pair syntax aligns well with RESTful principles, making it the most common choice for modern Cisco REST APIs.

Answer

CSV

Answer

HTML

Question 2

What is the default transport protocol for NETCONF sessions?

Accepted Answer

SSH. NETCONF (Network Configuration Protocol) uses SSH as its default transport protocol, as specified in RFC 6242. SSH provides the required secure, authenticated, and encrypted channel for NETCONF sessions, ensuring confidentiality and integrity of configuration data exchanged between the client and server.

Answer

HTTP

Answer

TLS

Answer

SNMP

Question 3

In the Ansible playbook snippet, what connection method is typically used for the ios_config module to communicate with the devices?

Accepted Answer

network_cli. The ios_config module is designed for Cisco IOS devices and requires a persistent network connection to send configuration commands. The network_cli connection method establishes an SSH session that remains open for the duration of the playbook task, allowing the module to send multiple CLI commands and handle prompts. This is the recommended connection method for ios_config because it supports privilege escalation and command responses needed for configuration changes.

Answer

local

Answer

netconf

Answer

httpapi

Question 4

A developer is using Python requests library to interact with a Cisco IOS XE device's REST API. The call returns a 400 Bad Request status. The payload is correctly formatted JSON. What is the most likely cause?

Accepted Answer

The authentication credentials are missing or incorrect in the request header. A 400 Bad Request status from a Cisco IOS XE REST API indicates a client-side error, typically related to malformed syntax or missing required elements. Since the JSON payload is confirmed as correctly formatted, the most likely cause is missing or incorrect authentication credentials in the request header, as the API requires valid credentials (e.g., Basic Auth with username:password encoded in Base64) to process the request. Without proper authentication, the server rejects the request with a 400 status before even evaluating the payload.

Answer

The device's API service is not enabled

Answer

The requested URL path is incorrect

Answer

The JSON payload contains a syntax error

Question 5

A network automation script uses RESTCONF to retrieve operational data from a Cisco device. What data format is typically supported by RESTCONF?

Accepted Answer

XML or JSON. RESTCONF (RFC 8040) is a REST-like protocol that uses HTTP methods to access structured data defined by YANG models. It natively supports both XML and JSON as data serialization formats, allowing clients to choose the format via the Accept header or URL suffix (e.g., .xml or .json). This makes XML and JSON the correct answer because they are the only formats explicitly defined in the RESTCONF specification for encoding configuration and operational data.

Answer

YAML

Answer

Plain text

Answer

CSV

Question 6

Which TWO statements are correct about Ansible inventory files? (Select exactly 2.)

Accepted Answer

Inventory files can be written in YAML format. Ansible inventory files define the hosts and groups that Ansible manages. They can be written in YAML format, which is a human-readable data serialization language that Ansible supports alongside the traditional INI format. This flexibility allows users to choose the format that best suits their automation needs, with YAML being particularly useful for complex inventories due to its support for structured data.

Answer

Inventory files cannot contain variables for individual hosts

Answer

Inventory files must be in INI format only

Answer

An inventory file can include a [vars] section to define group variables

Question 7

An organization wants to automate the deployment of wireless configurations across multiple Meraki networks using the Meraki Dashboard API. What authentication method should the developer use in the API requests?

Accepted Answer

Include an API key in the X-Cisco-Meraki-API-Key header. The Meraki Dashboard API uses a simple API key for authentication, not OAuth2 or JWT. The key must be included in the `X-Cisco-Meraki-API-Key` header of every request. This is the only supported method for authenticating with the Meraki API, as documented by Cisco Meraki.

Answer

Provide username and password in the Authorization header with Basic auth

Answer

Use OAuth2 client credentials grant and pass a bearer token

Answer

Generate a JSON Web Token (JWT) signed with a shared secret

Question 8

In Cisco DNA Center, which API endpoint is used to retrieve the site hierarchy?

Accepted Answer

GET /dna/intent/api/v1/site. The site hierarchy can be retrieved via GET /dna/intent/api/v1/site.

Answer

POST /dna/intent/api/v1/site

Answer

GET /dna/intent/api/v1/network-device

Answer

GET /dna/intent/api/v1/topology

Question 9

An engineer is troubleshooting packet loss between two hosts on different subnets. The traceroute shows that packets reach the first hop router but then stop. The router's ARP table shows an incomplete entry for the next-hop IP address. What is the most likely cause?

Accepted Answer

The next-hop device is powered off or has a Layer 1 issue.. An incomplete ARP entry for the next-hop IP address indicates that the router sent an ARP request but received no reply. This typically means the next-hop device is unreachable at Layer 2, often because it is powered off, has a failed interface, or there is a cabling issue. Since traceroute shows packets reaching the first hop but not beyond, the Layer 2 failure at the next hop is the most direct cause.

Answer

The MTU is misconfigured on the outgoing interface.

Answer

The routing protocol has not converged yet.

Answer

An ACL is blocking traffic on the outgoing interface.

Question 10

Match each Python library to its typical use in network automation.

Accepted Answer

Netmiko: Simplifies SSH connections to network devices. Netmiko, NAPALM, Paramiko, and PyEZ are common Python libraries in network automation. Netmiko simplifies SSH, NAPALM provides a vendor-agnostic API, Paramiko is a low-level SSH library, and PyEZ is Juniper-specific. Common confusions include mixing Netmiko with HTTP libraries and NAPALM with vendor-specific tools.

Answer

Netmiko: Used for HTTP REST API calls

Answer

NAPALM: Juniper-specific library for automation