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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What command is used to troubleshoot CRC errors?

#check errors
#show interface
#show error logs
#display interface statistics

The correct answer is: #show interface

The command that is used to troubleshoot CRC (Cyclic Redundancy Check) errors is "show interface." This command displays a wealth of information about the status and statistics of interfaces on a Cisco device. Among the details provided, it includes error counts, which specifically encompass CRC errors. These errors typically indicate issues with the integrity of data being transmitted, often as a result of collision, interference, or hardware malfunctions. By utilizing this command, network administrators can view the number of CRC errors alongside other statistics like input and output packets, discarded packets, and framing errors. This comprehensive overview is essential for diagnosing issues related to interface performance and connectivity. It allows for identification of problems at the physical layer of the network, leading to informed troubleshooting and resolution of underlying network issues.