Which of the following Is the most likely cause?

A network administrator is notified that a user cannot access resources on the network. The network administrator checks the physical connections to the workstation labeled User 3 and sees the Ethernet is properly connected. However, the network interface’s indicator lights are not blinking on either the computer or the switch.

Which of the following Is the most likely cause?
A . The switch failed.
B . The default gateway is wrong.
C . The port Is shut down.
D . The VLAN assignment is incorrect.

View Answer

Answer: C

Explanation:

When a network interface’s indicator lights are not blinking on either the computer or the switch, it suggests a physical layer issue.

Here is the detailed reasoning:

Ethernet Properly Connected: The Ethernet cable is correctly connected, eliminating issues related to a loose or faulty cable.

No Indicator Lights: The absence of blinking indicator lights on both the computer and the switch typically points to the port being administratively shut down.

Switch Port Shut Down: In networking, a switch port can be administratively shut down, disabling it from passing any traffic. This state is configured by network administrators and can be verified and changed using the command-line interface (CLI) of the switch.

Command to Check and Enable Port:

bash

Copy code

Switch> enable

Switch# configure terminal

Switch(config)# interface [interface id]

Switch(config-if)# no shutdown

The command no shutdown re-enables the interface if it was previously disabled. This will restore the link and the indicator lights should start blinking, showing activity.

Reference: Basic Configuration Commands PDF, sections on interface configuration (e.g., shutdown, no shutdown).