200-901 Infrastructure and Automation Practice Test 6 — 15 Questions

Question 1

Which TWO are valid capabilities advertised during a NETCONF session?

Accepted Answer

urn:ietf:params:netconf:capability:url:1.0. The URL capability (urn:ietf:params:netconf:capability:url:1.0) is a standard NETCONF capability that allows a client to specify a URL as the source or target of operations like or . Option D is correct because urn:ietf:params:netconf:base:1.0 is the mandatory base capability that every NETCONF session must advertise, as defined in RFC 6241, indicating support for the core NETCONF protocol operations.

Answer

urn:ietf:params:netconf:capability:writable-running:2.0

Answer

urn:ietf:params:netconf:capability:validate:2.0

Answer

urn:ietf:params:netconf:capability:interleave:1.0

Question 2

A developer is using the Meraki API to retrieve a list of networks for an organization. Which HTTP method and endpoint should be used?

Accepted Answer

GET /organizations/{organizationId}/networks. The Meraki API uses RESTful conventions where retrieving a list of resources is done with a GET request. The endpoint GET /organizations/{organizationId}/networks returns all networks belonging to a specific organization, as documented in the Meraki API reference. This matches the standard pattern for listing child resources under a parent resource.

Answer

POST /organizations/{organizationId}/networks

Answer

GET /networks

Answer

PUT /organizations/{organizationId}/networks

Question 3

Which tool is designed for infrastructure as code, uses a declarative language, and can automate configuration management across multiple devices?

Accepted Answer

Ansible. Ansible is the correct answer because it is an infrastructure-as-code tool that uses a declarative YAML-based language (playbooks) to define desired system states. It automates configuration management across multiple devices agentlessly, using SSH or WinRM to push configurations, making it ideal for multi-device environments.

Answer

Git

Answer

Python

Answer

Postman

Question 4

Refer to the exhibit. Based on the YANG model snippet, what is the data type of the 'mask' leaf?

Accepted Answer

inet:ipv4-prefix-length. The 'mask' leaf is defined with the type 'inet:ipv4-prefix-length', which represents a decimal integer from 0 to 32 indicating the number of leading 1 bits in the subnet mask (e.g., 24 for /24). This is the correct data type for a prefix length in YANG models, not an IPv4 address or a generic string.

Answer

inet:ipv4-address

Answer

uint8

Answer

string

Question 5

Which THREE are common best practices for implementing CI/CD in network automation?

Accepted Answer

Use version control for all automation scripts and playbooks. Version control (e.g., Git) is a fundamental CI/CD best practice: it tracks changes, enables rollbacks, and supports collaboration on automation scripts and playbooks. Without version control, you lose auditability and the ability to reliably reproduce network states, which violates the principle of infrastructure as code.

Answer

Perform manual testing after every deployment

Answer

Store credentials and secrets in code repositories

Question 6

Using the Cisco DNA Center API, an engineer wants to create a new site with building and floor information. Which HTTP method and endpoint should be used?

Accepted Answer

POST /dna/intent/api/v1/site. The POST HTTP method is used to create a new resource on the server, and the Cisco DNA Center API endpoint `/dna/intent/api/v1/site` is designed to accept a POST request with a JSON payload containing site, building, and floor details. This follows RESTful conventions where POST is the standard method for resource creation, and the API documentation specifies this exact endpoint for adding a new site hierarchy.

Answer

PUT /dna/intent/api/v1/site

Answer

GET /dna/intent/api/v1/site

Answer

POST /dna/intent/api/v1/site/create

Question 7

Refer to the exhibit. An Ansible playbook is intended to set the description on GigabitEthernet0/1. However, the playbook fails because the device does not have that interface. What is the most likely reason?

Accepted Answer

The specified interface does not exist on the device. The playbook explicitly targets GigabitEthernet0/1 using the `interface` attribute under `lines`, and the error indicates the device does not have that interface. Ansible's ios_config module will fail if the specified interface does not exist on the device, as it cannot apply configuration to a non-existent logical or physical interface.

Answer

The module requires gather_facts to be yes

Answer

The hosts group is incorrect

Answer

The lines attribute is misconfigured

Question 8

A developer is using Git to manage automation code. What is the primary advantage of using 'rebase' instead of 'merge' to integrate changes from a feature branch into the main branch?

Accepted Answer

Rebase results in a linear project history. `git rebase` rewrites the commit history of the feature branch to appear as if it was branched from the latest commit on the main branch, resulting in a linear, clean project history. This avoids the merge commits that `git merge` creates, making the commit log easier to follow and debug. The primary advantage is not speed or conflict resolution, but a streamlined, non-branching history.

Answer

Rebase automatically resolves all conflicts

Answer

Rebase is faster than merge

Answer

Rebase preserves the exact commit timestamps

Question 9

Which TWO statements correctly describe differences between model-driven telemetry and traditional SNMP polling?

Accepted Answer

Model-driven telemetry reduces device CPU usage compared to frequent SNMP polling. Model-driven telemetry uses a push model that sends data only when there is a change or at a configured interval, which significantly reduces the device CPU overhead compared to frequent SNMP polling, where the device must process and respond to each individual GET request from the NMS. This efficiency gain is a primary advantage of telemetry over traditional polling.

Answer

SNMP supports push-based notifications using informs

Answer

Model-driven telemetry can only be used with NETCONF

Answer

SNMP uses YANG models for data definition

Question 10

A Python script using the ncclient library connects to a Cisco IOS-XE device to retrieve the running configuration. The script raises an exception: 'TimeoutError: Session timed out'. Which is the most likely cause?

Accepted Answer

The SSH port (830) is blocked by a firewall. The ncclient library uses NETCONF over SSH, which by default connects to TCP port 830. A 'TimeoutError: Session timed out' indicates that the TCP connection to the device could not be established within the timeout period. The most likely cause is that a firewall is blocking port 830, preventing the SSH session from being initiated.

Answer

The device does not support NETCONF

Answer

The device's running configuration is too large

Answer

The XML payload is malformed

Question 11

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 12

An engineer needs to automate the backup of configuration files from multiple Cisco IOS devices to a central server. Which protocol is most appropriate for pushing configurations from the devices to the server?

Accepted Answer

SCP. SCP (Secure Copy Protocol) is the most appropriate choice because it provides encrypted, authenticated file transfers over SSH, ensuring the confidentiality and integrity of Cisco IOS configuration backups. It is natively supported on Cisco IOS devices and allows secure push operations to a central server without requiring additional software.

Answer

TFTP

Answer

FTP

Answer

HTTP

Question 13

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 14

Which tool is specifically designed for model-driven programmability using YANG data models?

Accepted Answer

NETCONF. NETCONF is the correct answer because it is a network management protocol specifically designed to operate with YANG data models, using XML or JSON encoding to transport configuration and state data. YANG defines the structure of the data, and NETCONF provides the operations (get, edit-config, etc.) to manipulate that data in a model-driven, programmatic way. This makes NETCONF the standard tool for model-driven programmability in modern network automation.

Answer

SNMP

Answer

CLI

Answer

Ansible

Question 15

A network team is implementing automation to provision new switchports across a campus network. They decide to use a controller-based approach with Cisco DNA Center. What is the primary advantage of using DNA Center for this task?

Accepted Answer

It allows intent-based automation where the desired state is defined and the controller pushes the necessary configuration.. Cisco DNA Center uses an intent-based networking model where the administrator defines the desired state (e.g., 'provision a switchport for access VLAN 10') and the controller automatically translates that intent into the necessary device configurations (CLI or NETCONF/YANG). This abstraction reduces manual errors and enforces consistency across the campus network without requiring per-device CLI scripting.

Answer

It automatically rolls back any configuration that deviates from the standard.

Answer

It replaces all existing CLI commands with a graphical interface.

Answer

It eliminates the need for any human intervention in network management.