Cisco Certified Network Associate (CCNA) Practice Exam

Which command displays one line of information per port channel?

1. #show port summary

2. #show etherchannel summary

3. #display etherchannel info

4. #show interface status

The correct answer is: #show etherchannel summary

The command that displays one line of information per port channel is the command that provides a summary of EtherChannels configured on a device. This command is specifically designed to present a concise view of the EtherChannel status, including details such as the interface number, protocol being used, total ports, and the operational state of the EtherChannel. Using the EtherChannel summary command is particularly useful for network administrators who need to quickly ascertain the health and configuration of their aggregated links. This command consolidates the information into a one-line format for each channel, making it easier to read and interpret when assessing multiple port channels. In contrast, the other commands provide different levels of detail or focus on different aspects of network interfaces. For instance, the command for showing interface status would typically give details on each individual interface rather than summarizing EtherChannel information. Similarly, the command related to port summary may not focus specifically on EtherChannels, leading to a lack of concise EtherChannel-specific data.