STP Configuration and Management 2

Question 1

Which command sets a Cisco switch as the root bridge for VLAN 10 using the preferred method?

Accepted Answer

spanning-tree vlan 10 root primary

Answer

spanning-tree vlan 10 priority 0

Answer

spanning-tree vlan 10 root-bridge

Answer

spanning-tree vlan 10 forward-time 0

Question 2

What is the default STP hello time on Cisco switches?

Accepted Answer

2 seconds

Answer

1 second

Answer

4 seconds

Answer

10 seconds

Question 3

When configuring PVST+, what is the valid range for the spanning-tree port priority value?

Accepted Answer

0–240 in increments of 16

Answer

0–255 in increments of 1

Answer

0–255 in increments of 16

Answer

0–65535 in increments of 4096

Question 4

Which Cisco IOS command enables Rapid PVST+ globally on a switch?

Accepted Answer

spanning-tree mode rapid-pvst

Answer

spanning-tree mode rstp

Answer

spanning-tree rapid enable

Answer

spanning-tree mode 802.1w

Question 5

What happens to a port configured with 'spanning-tree bpduguard enable' when it receives a BPDU?

Accepted Answer

The port is placed in err-disabled state

Answer

The port transitions to blocking state

Answer

The port discards the BPDU and continues forwarding

Answer

The port sends a topology change notification

Question 6

Which command verifies the STP root bridge and port roles on a Cisco switch for VLAN 1?

Accepted Answer

show spanning-tree vlan 1

Answer

show spanning-tree brief

Answer

show spanning-tree root

Answer

show spanning-tree summary

Question 7

What is the purpose of 'spanning-tree vlan 10 root secondary'?

Accepted Answer

Sets priority to 28672 to become backup root if the primary fails

Answer

Sets priority to 0 to become backup root

Answer

Configures the switch as a backup designated bridge

Answer

Sets priority to 32768 as a secondary root backup