Practise command-choice questions where the task is to identify the correct verification, configuration or troubleshooting command.
Start Scenario PracticeA developer is troubleshooting a Cisco RESTCONF API call that returns a 409 Conflict error. Which two scenarios could cause this? (Choose two.)
Explanation: Option B is correct because RESTCONF returns HTTP 409 Conflict when the server cannot complete the request due to a conflict with the resource's current state, such as attempting to delete a resource that is still referenced or in use by another object. Option C is correct because a 409 Conflict is also returned when a client attempts to create a resource that already exists, violating the uniqueness constraint of the target data node. Option A is incorrect because a missing authentication token produces HTTP 401 Unauthorized (or 403 Forbidden), not 409. Option D is incorrect because a nonexistent resource yields HTTP 404 Not Found. Option E is incorrect because invalid data types trigger HTTP 400 Bad Request due to schema or validation failure.
A network engineer configures an HTTP/2 server. Which feature of HTTP/2 reduces overhead by compressing headers using HPACK?
Explanation: HPACK is the header compression mechanism specified for HTTP/2 (RFC 7541). It reduces overhead by encoding HTTP headers into a compact binary format using static and dynamic tables, eliminating redundant header data across requests. This directly addresses the question's focus on reducing overhead through header compression.
Drag 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.
Refer to the exhibit. A developer is writing an Ansible playbook to configure this interface on a Cisco IOS XE device. Which Ansible module should be used to set the IP address?
Explanation: The `ios_config` module is the correct choice because it allows you to push raw configuration lines to Cisco IOS XE devices, including interface IP address configuration. It directly sends the `ip address` command under the interface context, which is the standard method for setting an IP address on an IOS XE interface. Other modules either lack the ability to set IP addresses or are designed for different purposes.
A developer is writing a script that uses a REST API to configure network devices via NETCONF. Which layer of the SDN architecture does NETCONF belong to?
Explanation: NETCONF is a network management protocol used to install, manipulate, and delete the configuration of network devices. In the SDN architecture, the southbound interface is the layer that connects the control plane to the data plane, and NETCONF operates as a southbound protocol by carrying configuration data from a controller or management system down to network devices.
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Practice all Which Command Should the Administrator Use Practice QuestionsPractise command-choice questions where the task is to identify the correct verification, configuration or troubleshooting command. 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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