Quick Answer
The correct choice is the `cli` library, which is a built-in Python module available within the Cisco Guest Shell for automating IOS XE CLI commands. This library provides two primary functions—`cli.execute()` for show commands and `cli.configure()` for configuration changes—allowing scripts to interact directly with the host device’s CLI without requiring external dependencies or network connections. On the Cisco DevNet Associate 200-901 exam, this question tests your understanding of Guest Shell’s native automation capabilities, often appearing as a straightforward recall item where the trap is confusing `cli` with third-party libraries like `netmiko` or `paramiko`. Remember that Guest Shell runs inside the device itself, so the `cli` library is the only module that can execute commands on the local IOS XE system without additional setup. A helpful memory tip: think of `cli` as the “concierge” for your script—it speaks directly to the router’s command line, no passport needed.
This 200-901 practice question tests your understanding of cisco platforms and development. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network administrator uses the Cisco IOS XE CLI to configure a router. They want to use a Python script to automate this configuration via the guest shell. Which library should they use to interact with the CLI from within the guest shell?
cli
The cli library allows Python to execute IOS XE commands.
requests
Why wrong: requests is for HTTP, not CLI.
ncclient
Why wrong: ncclient is for NETCONF, not CLI.
paramiko
Why wrong: paramiko is for SSH, not needed in guest shell.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
cli
The `cli` library is a built-in Python module available within the Cisco Guest Shell that allows scripts to execute IOS XE CLI commands directly on the host device. This library provides functions like `cli.execute()` and `cli.configure()` to send commands and retrieve output, making it the correct choice for automating configuration via the Guest Shell without external dependencies.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
cli
Why this is correct
The cli library allows Python to execute IOS XE commands.
Related concept
Read the scenario before looking for a memorised answer.
requests
Why it's wrong here
requests is for HTTP, not CLI.
ncclient
Why it's wrong here
ncclient is for NETCONF, not CLI.
paramiko
Why it's wrong here
paramiko is for SSH, not needed in guest shell.
Common exam traps
Cisco often tests the distinction between on-box automation (using the `cli` library) and off-box automation (using libraries like paramiko, ncclient, or requests), and the trap here is that candidates may assume any SSH library (paramiko) works for local Guest Shell interaction, not realizing the `cli` library is purpose-built for direct host communication.
Detailed technical explanation
The Guest Shell runs in a Linux container (LXC) on the IOS XE device, and the `cli` library uses inter-process communication (IPC) via Unix domain sockets to send commands to the host IOS XE process. This avoids the overhead of SSH or HTTP and allows the script to execute both `exec` (show commands) and `configure` (config mode) operations. In real-world automation, this is used for on-box scripting where a Python script periodically checks interface status and applies configuration changes without external orchestrators.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..
The correct answer is: cli — The `cli` library is a built-in Python module available within the Cisco Guest Shell that allows scripts to execute IOS XE CLI commands directly on the host device. This library provides functions like `cli.execute()` and `cli.configure()` to send commands and retrieve output, making it the correct choice for automating configuration via the Guest Shell without external dependencies.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.
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