STP

Question 1

SPT (Spanning Tree Protocol) 802.1d

Answer 1

• Permits redundant links between switches
• Prevents looping of network trafficc

Question 2

SPB (Shortest Path Bridging)

Answer 2

Used instead of STP for larger network environments

Question 3

Root Bridge

Answer 3

• Switch acts as a reference point for STP
• Lowest BID (Bridge ID)

Question 4

BID (Bridge ID)

Answer 4

• Made up of a Priority Value and a MAC
• Lowest value is the Root Bridge

Question 5

Root Port

Answer 5

• Assigned on every non-root bridge
• Port cloest to the root bridge in cost and port number

Question 6

Designated Port

Answer 6

• Every network segment has a designated port which is the closes to the root bridge in terms of cost
• All ports on the root bridge are designated ports

Question 7

Non-Designated Ports

Answer 7

• Block traffic loops
• If a link in the topology goes down it will detect that failure and determine whether or not to transition itself into a forwarding state and become a designated port or a root port.

Question 8

Blocking

Answer 8

BPDUs are received but not forwarded

Question 9

Listening

Answer 9

Populates the MAC address table but does not forward frames

Question 10

Learning

Answer 10

• Processes BPDUs
• This is where it determins its role in the spanning tree

Question 11

Forwarding

Answer 11

Forwards frames for opertations

Question 12

Link Cost

Answer 12

• Associated with the speed of the link
• The lower the speed the higher the cost