What command would be used to enable Portfast on a switch's interface specifically?

What command would be used to enable Portfast on a switch's interface specifically?

• A. SW1(config-if)# spanning-tree portfast enable
• B. SW1(config-if)# spanning-tree portfast
• C. SW1(config-if)# enable portfast
• D. SW1(config-if)# portfast

Answer: (B)

The command used to enable PortFast on a specific interface of a switch is "spanning-tree portfast." When entering this command in interface configuration mode, it effectively modifies the Spanning Tree Protocol (STP) settings for that interface, allowing it to transition directly to the forwarding state, bypassing the listening and learning states. This behavior is particularly useful for ports connected to end devices, such as computers and printers, where quick connectivity is desired. By using this command, you help to minimize the time it takes for devices to access the network after being plugged in, thus enhancing the overall user experience. Other commands may not function correctly because they either do not exist in the context of implementing PortFast or they represent inaccurate syntax within the configuration structure.

The command used to enable PortFast on a specific interface of a switch is "spanning-tree portfast." When entering this command in interface configuration mode, it effectively modifies the Spanning Tree Protocol (STP) settings for that interface, allowing it to transition directly to the forwarding state, bypassing the listening and learning states. This behavior is particularly useful for ports connected to end devices, such as computers and printers, where quick connectivity is desired.

By using this command, you help to minimize the time it takes for devices to access the network after being plugged in, thus enhancing the overall user experience. Other commands may not function correctly because they either do not exist in the context of implementing PortFast or they represent inaccurate syntax within the configuration structure.