Section 4.2 Spanning Tree Overview

You have just connected four switches as shown in the Exhibit. Assuming the default switch configuration, which switch will become the root bridge?

B

A switch running STA is a backup bridge. What state is it in?

Blocking

You just connected four switches as shown in the Exhibit. Assuming the default switch configuration, how can you force switch C to become the root bridge?

Configure a priority number of 4096 for switch C.

You have three switches configured as shown in the Exhibit. How could you guarantee that switch C becomes the root bridge?

Configure switch C with a lower priority value.

What problem does the Spanning Tree Protocol prevent?

It prevents message loops from developing when a switch or bridge is connected to the same location more than once.

You have two switches connected as shown in the Exhibit. You would like to configure rapid spanning tree on switch A. On which ports would you use the portfast feature?

Fa0/1 and Fa0/2

A switch running STA is in the listening state. A message arrives at the switch destined for a different network segment. Which of the following best describes what the switch will do?

It does not record address or segment information. It does not forward the message.

A switch running the STA is in the learning state. A message arrives at the switch destined for a different network segment. Which of the following best describes what the switch will do?

It places the source address and segment in its database, but does not forward the message.

Switches running the STA are in the process of exchanging BPDUs and defining their roles. In what state are the switches?

Listening

Which statements accurately describe port states of both bridges and switches? (Select two.)

Ports in a blocked state still receive BPDUs. In the learning state, the MAC address table can be populated but frames are not forwarded.

Which of the following are advantages of using the Spanning Tree Protocol (STP) in the network segmented bridges? (Select three.)

STP prevents message loops from forming. STP lets you provide redundancy by using more than one connection between devices, which makes your network more stable. STP identifies the most efficient path through a bridged network.