STP STP Fundamentals 2

Question 1

What is a designated port in STP?

Accepted Answer

A port on each segment that provides the best path to the root bridge and forwards traffic

Answer

A port that is always blocked

Answer

A port connected to end devices only

Answer

A management port

Question 2

What is an STP root port?

Accepted Answer

The port on each non-root switch that has the lowest cost path to the root bridge

Answer

A port on the root bridge

Answer

A port that is always in blocking state

Answer

A port used for management access

Question 3

What causes an STP topology change?

Accepted Answer

A port transitioning to or from the forwarding state

Answer

A new VLAN being created

Answer

A change in IP addresses

Answer

A DNS server update

Question 4

What is the STP max age timer?

Accepted Answer

The maximum time a switch stores BPDU information before discarding it, default 20 seconds

Answer

The maximum age of a switch

Answer

The maximum uptime allowed

Answer

The maximum number of VLANs

Question 5

What is the convergence time for 802.1D STP?

Accepted Answer

30 to 50 seconds typically

Answer

Less than 1 second

Answer

5 minutes

Answer

10 minutes

Question 6

What is a BPDU guard?

Accepted Answer

A feature that disables a port if it receives a BPDU, protecting against unauthorized switches

Answer

A physical lock on a switch port

Answer

Firewall protection

Answer

Password protection for BPDUs