Which of the following states indicates that an interface is administratively down?

Which of the following states indicates that an interface is administratively down?

• A. up/up
• B. down/up
• C. down/down
• D. administratively down/down

Answer: (D)

When an interface is described as "administratively down," it indicates that the interface has been intentionally disabled by an administrator through command line interface commands. In networking equipment, particularly Cisco routers and switches, the status of an interface can display various states reflecting its operational status. The "administratively down/down" state specifically shows that the interface is not operational due to a configuration command (such as "shutdown") executed by an administrator. In this state, the interface does not participate in network communications at all, as it has been administratively disabled. In contrast, other states, such as “up/up,” indicate that the interface is both physically and logically operational, while “down/up” refers to a situation where the interface is not able to communicate at the physical layer but is configured to be active. The “down/down” state means that while the interface is not operational, it hasn’t been administratively disabled, often due to issues such as a cable disconnection or hardware failure. Therefore, "administratively down/down" is a distinct indicator of an interface's configuration state being purposely set to inactive by the administrator.

When an interface is described as "administratively down," it indicates that the interface has been intentionally disabled by an administrator through command line interface commands. In networking equipment, particularly Cisco routers and switches, the status of an interface can display various states reflecting its operational status.

The "administratively down/down" state specifically shows that the interface is not operational due to a configuration command (such as "shutdown") executed by an administrator. In this state, the interface does not participate in network communications at all, as it has been administratively disabled.

In contrast, other states, such as “up/up,” indicate that the interface is both physically and logically operational, while “down/up” refers to a situation where the interface is not able to communicate at the physical layer but is configured to be active. The “down/down” state means that while the interface is not operational, it hasn’t been administratively disabled, often due to issues such as a cable disconnection or hardware failure. Therefore, "administratively down/down" is a distinct indicator of an interface's configuration state being purposely set to inactive by the administrator.