STP STP Fundamentals

Question 1

What is the primary purpose of Spanning Tree Protocol?

Accepted Answer

To prevent Layer 2 switching loops in networks with redundant paths

Answer

To route IP packets

Answer

To encrypt network traffic

Answer

To manage DHCP addresses

Question 2

What is a bridge ID in STP?

Accepted Answer

A combination of bridge priority and MAC address used to elect the root bridge

Answer

An IP address assigned to switches

Answer

A physical label on the switch

Answer

A VLAN identifier

Question 3

What is the root bridge in STP?

Accepted Answer

The switch with the lowest bridge ID that serves as the reference point for all path calculations

Answer

The switch with the most ports

Answer

The fastest switch

Answer

The newest switch on the network

Question 4

What are the STP port states in 802.1D?

Accepted Answer

Blocking, Listening, Learning, Forwarding, Disabled

Answer

Active, Inactive

Answer

Open, Closed

Answer

On, Off, Standby

Question 5

What is the STP path cost?

Accepted Answer

A value assigned to each port based on link speed, used to determine the best path to the root bridge

Answer

The price of the network cable

Answer

The physical distance between switches

Answer

The number of VLANs on a link

Question 6

How often does the root bridge send BPDUs?

Accepted Answer

Every 2 seconds by default (hello timer)

Answer

Every 10 seconds

Answer

Every 30 seconds

Answer

Only once during initialization