What effect does the spanning-tree portfast configuration command have on a switch?

What effect does the spanning-tree portfast configuration command have on a switch?

• A. It disables spanning tree on the switch
• B. It enables portfast on a specific switch interface
• C. It creates a trunk link automatically
• D. It prioritizes traffic for a specific VLAN

Answer: (B)

The spanning-tree portfast configuration command is specifically designed to enable PortFast on an individual switch interface. When PortFast is activated, the switch port transitions to the forwarding state immediately upon link-up, bypassing the usual Spanning Tree Protocol (STP) listening and learning states. This is particularly useful for ports that connect to end devices, like computers or printers, where a quick connection is desired without the delay introduced by STP. This command is especially advantageous in environments where rapid connectivity is essential, as it minimizes the time that a host must wait to join the network. By allowing the port to go directly to the forwarding state, it reduces potential downtime and enhances the overall efficiency of the network. In contrast, other options like disabling spanning tree altogether, automatically creating trunk links, or prioritizing traffic for a specific VLAN do not reflect the specific functionality provided by the PortFast configuration.

The spanning-tree portfast configuration command is specifically designed to enable PortFast on an individual switch interface. When PortFast is activated, the switch port transitions to the forwarding state immediately upon link-up, bypassing the usual Spanning Tree Protocol (STP) listening and learning states. This is particularly useful for ports that connect to end devices, like computers or printers, where a quick connection is desired without the delay introduced by STP.

This command is especially advantageous in environments where rapid connectivity is essential, as it minimizes the time that a host must wait to join the network. By allowing the port to go directly to the forwarding state, it reduces potential downtime and enhances the overall efficiency of the network.

In contrast, other options like disabling spanning tree altogether, automatically creating trunk links, or prioritizing traffic for a specific VLAN do not reflect the specific functionality provided by the PortFast configuration.