ICND1 Spanning Tree Protocol (STP)

Question 1

What is the primary purpose of Spanning Tree Protocol (STP)?

Accepted Answer

To prevent switching loops in Layer 2 networks

Answer

To enable dynamic routing between VLANs

Answer

To provide load balancing across multiple uplinks

Answer

To encrypt traffic between switches

Question 2

Which IEEE standard defines the original Spanning Tree Protocol?

Accepted Answer

IEEE 802.1D

Answer

IEEE 802.1Q

Answer

IEEE 802.3

Answer

IEEE 802.1W

Question 3

What is the default bridge priority value used by Cisco switches in STP?

Accepted Answer

32768

Answer

4096

Answer

61440

Answer

65535

Question 4

In STP, which port state actively forwards user traffic and learns MAC addresses?

Accepted Answer

Forwarding

Answer

Blocking

Answer

Listening

Answer

Learning

Question 5

How is the Root Bridge elected in an STP topology?

Accepted Answer

The switch with the lowest Bridge ID wins

Answer

The switch with the highest MAC address wins

Answer

The switch with the most active ports wins

Answer

The switch configured as the default gateway wins

Question 6

Which STP port state immediately follows the Listening state in the port state transition?

Accepted Answer

Learning

Answer

Forwarding

Answer

Blocking

Answer

Disabled

Question 7

What is the default STP Hello timer interval at which the Root Bridge sends BPDUs?

Accepted Answer

2 seconds

Answer

1 second

Answer

5 seconds

Answer

10 seconds