Cisco Certified Network Associate (CCNA) Practice Exam

Which command displays descriptions for router interfaces?

1. show running-config

2. show interface description

3. show interfaces

4. show ip protocols

The correct answer is: show interface description

The correct command to display descriptions for router interfaces is indeed found in the choices specified. The command that specifically focuses on displaying interface descriptions is essential for network administrators to easily understand what each interface is intended for, especially in complex networks where many interfaces may be configured. Using a command that is dedicated to showing interface descriptions aids in providing a more organized view of the interface configurations, making troubleshooting and management tasks more efficient. Having clear descriptions helps identify the purpose of each interface, improving overall network documentation and clarity. Other commands listed, while useful for different purposes, do not focus specifically on interface descriptions. The 'show running-config' command provides comprehensive details about the current configuration, but it includes all configured settings rather than isolating the interface descriptions. The 'show interfaces' command displays a wide array of metrics and operational state of interfaces but does not specifically cater to showing the descriptions themselves. The 'show ip protocols' command caters to the routing protocols in use and is unrelated to interface descriptions altogether.