Cisco Certified Network Associate (CCNA) Practice Exam

What command displays detailed interface statistics including collision and duplex?

1. show ip protocol

2. show interface INTERFACE NUMBER

3. show vlan brief

4. show controllers

The correct answer is: show interface INTERFACE NUMBER

The command that displays detailed interface statistics, including information on collisions and duplex settings, is indeed "show interface INTERFACE NUMBER." This command provides a comprehensive overview of the specified interface, offering data such as the interface status (up or down), bandwidth, delay, reliability, and encapsulation. It also details specific statistics related to the interface performance, such as packets received and sent, any errors encountered, and collision statistics, which are crucial for assessing the health and efficiency of the network interface. Understanding such statistics is essential for network troubleshooting and optimization. For instance, high collision counts can indicate issues in the network, such as congestion or inadequately sized collision domains, while duplex mismatches can lead to inefficient communications and degraded performance. Therefore, using the "show interface" command is a key practice for network engineers to maintain optimal network functionality.