When employees are unable to connect to internal servers, which command should be used to diagnose the interface state?

When employees are unable to connect to internal servers, which command should be used to diagnose the interface state?

• A. show vlan brief
• B. show ip route
• C. show ip interface brief
• D. show running-config

Answer: (C)

The command that is useful for diagnosing the interface state is "show ip interface brief." This command provides a concise summary of all interfaces on the device along with their IP addresses, status (up or down), and protocol state (up or down). If employees are having trouble connecting to internal servers, it is essential to check whether the relevant interfaces are operational. Any interface that is down could indicate a physical or configuration issue, impacting connectivity. This command's output allows network administrators to quickly assess the status of interfaces, enabling them to pinpoint where problems may exist. Verifying both the physical state of the interface and its link layer protocol helps in troubleshooting connectivity issues efficiently. In comparison, the other commands serve different purposes. For example, "show vlan brief" displays VLAN configurations but does not directly relate to the state of specific interfaces. Meanwhile, "show ip route" provides routing information and tables, which are relevant after confirming the interfaces are operational. Lastly, "show running-config" shows the complete current configuration, which while useful, can be too detailed for a quick status check on interface states.

The command that is useful for diagnosing the interface state is "show ip interface brief." This command provides a concise summary of all interfaces on the device along with their IP addresses, status (up or down), and protocol state (up or down). If employees are having trouble connecting to internal servers, it is essential to check whether the relevant interfaces are operational. Any interface that is down could indicate a physical or configuration issue, impacting connectivity.

This command's output allows network administrators to quickly assess the status of interfaces, enabling them to pinpoint where problems may exist. Verifying both the physical state of the interface and its link layer protocol helps in troubleshooting connectivity issues efficiently.

In comparison, the other commands serve different purposes. For example, "show vlan brief" displays VLAN configurations but does not directly relate to the state of specific interfaces. Meanwhile, "show ip route" provides routing information and tables, which are relevant after confirming the interfaces are operational. Lastly, "show running-config" shows the complete current configuration, which while useful, can be too detailed for a quick status check on interface states.