Practise routing and connectivity troubleshooting scenarios involving R1, R2, R3, static routes, OSPF, next hops and routing tables.
Start Scenario PracticeDrag and drop the steps to configure OSPF on a Cisco router into the correct order.
Explanation: OSPF configuration requires enabling the OSPF process, setting a router ID, and advertising networks in specific areas.
An engineer is writing a Python script using the Cisco DevNet sandbox to configure OSPF on a CSR1000v via RESTCONF. What authentication method is typically used for RESTCONF requests?
Explanation: RESTCONF typically uses Basic authentication over HTTPS (RFC 7235) because it is a lightweight, stateless mechanism that sends a base64-encoded username:password pair in the Authorization header. In the Cisco DevNet sandbox CSR1000v environment, this is the standard method for authenticating RESTCONF requests, as the sandbox provides a username and password for access.
A developer writes a Python script using Cisco's pyATS framework to test network reachability after a configuration change. What is a key advantage of using pyATS over a simple script that uses ping?
Explanation: PyATS is a test automation framework designed for network engineers, providing built-in test libraries (e.g., `pyats.aetest`) that enable writing reusable, modular test scripts. Unlike a simple ping script, pyATS supports structured test cases, data-driven testing, and integration with Cisco devices via libraries like `Genie`, allowing for comprehensive validation beyond basic reachability.
A security team is developing an application that collects network alerts from Cisco Firepower Management Center (FMC) API. The API requires OAuth2 authorization code grant flow. After obtaining an authorization code, what must the application do to get an access token?
Explanation: In the OAuth2 authorization code grant flow, the authorization code is an intermediate credential that must be exchanged for an access token. The application must call the token endpoint, presenting the authorization code along with its client credentials (client ID and client secret) to receive the access token. This exchange is required by RFC 6749 and is a fundamental security measure to ensure the client is authorized to obtain the token.
Which of the following is a non-overlapping channel in the 2.4 GHz Wi-Fi band?
Explanation: In the 2.4 GHz Wi-Fi band, channels are spaced 5 MHz apart, but each channel is 22 MHz wide. To avoid overlap, channels must be separated by at least 5 channels (25 MHz). The only non-overlapping channels in North America are 1, 6, and 11. Channel 6 is one of these, making it the correct answer.
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Practice all Router R1 Cannot Reach R3 Practice QuestionsPractise routing and connectivity troubleshooting scenarios involving R1, R2, R3, static routes, OSPF, next hops and routing tables. These appear throughout the 200-901 and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 200-901. Practicing each scenario type ensures you're ready for any format.
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