STP Features (SRWE Module 5)

Purpose of the BackboneFast feature in Cisco switches

• To detect a link failure and transition a port the the forwarding state quickly

• To detect indirect topology changes and recover from link failures quickly

• To prevent a switch from becoming a root bridge in a network

• To disable a port if it stops receiving BPDUs to prevent a loop

Purpose of the UplinkFast feature in Cisco switches

• To detect a link failure and transition a port the the forwarding state quickly

• To detect indirect topology changes and recover from link failures quickly

• To prevent a switch from becoming a root bridge in a network

• To disable a port if it stops receiving BPDUs to prevent a loop

Purpose of the RootGuard feature in Cisco switches

• To detect a link failure and transition a port the the forwarding state quickly

• To detect indirect topology changes and recover from link failures quickly

• To prevent a switch from becoming a root bridge in a network

• To disable a port if it stops receiving BPDUs to prevent a loop

Purpose of the LoopGuard feature in Cisco switches

• To detect a link failure and transition a port the the forwarding state quickly

• To detect indirect topology changes and recover from link failures quickly

• To prevent a switch from becoming a root bridge in a network

• To disable a port if it stops receiving BPDUs to prevent a loop

Which command is used to enable Loop Guard globally on a Cisco switch?

• spanning-tree guard root

• spanning-tree loopguard default

• spanning-tree guard loop

• spanning-tree uplinkfast

What does the BPDU Filter feature do in a network?

• It prevents BPDUs from being transmitted or received

• It blocks unauthorized devices from accessing the network

• It increases the speed of BPDU transmission

• It allows BPDUs to be transmitted but not received

Which command is used to configure Loop Guard on an interface level?

• spanning-tree guard root

• spanning-tree loopguard default

• spanning-tree guard loop

• spanning-tree uplinkfast

What is the main difference between BPDU Filter and BPDU Guard?

• BPDU Filter puts the port in err-disabled mode, BPDU Guard enables traffic to still transmit.

• BPDU Guard puts the port in err-disabled mode, BPDU Filter enables traffic to still transmit and ignores the BPDU.

• BPDU Filter increases transmission speed, while BPDU Guard decreases it.

• BPDU Filter is used for wireless networks, while BPDU Guard is for wired networks.

Which feature protects Layer 2 networks from loops if a switch stops receiving BPDUs from its neighbor?

• BackboneFast

• UplinkFast

• Root Guard

• Loop Guard

What is the command to prevent a switch from becoming a root bridge?

• spanning-tree guard root

• spanning-tree loopguard default

• spanning-tree guard loop

• spanning-tree uplinkfast