Cisco Certified Network Associate (CCNA) Practice Exam

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Study for the Cisco Certified Network Associate (CCNA) exam with our comprehensive quiz featuring multiple-choice questions and detailed explanations. Prepare effectively and enhance your understanding of networking concepts!

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Which command would you use to troubleshoot interface speed and duplex settings?

#show interface INTERFACE NUMBER
#show controllers INTERFACE NUMBER
#show ip interface brief
#show version

The correct answer is: #show interface INTERFACE NUMBER

Utilizing the command to display the status of an interface and its configuration is essential for troubleshooting speed and duplex settings. The command reveals critical details such as the interface's operational state, configured speed, and duplex mode. When diagnosing potential issues like mismatches in speed or duplex between devices, this command provides direct visibility into the parameters affecting connectivity. It also helps in identifying whether the interface is administratively up or down, and it can show error statistics which may indicate problems related to speed and duplex settings, such as collisions and late collisions. This information is crucial for ensuring that both ends of a connection are configured appropriately to communicate effectively. While other commands serve different functions, they may not provide the same level of detail concerning speed and duplex settings or may focus on other aspects of the device's operation or configuration.