ICND1 Spanning Tree Protocol (STP) 3

Question 1

Which IEEE standard defines Rapid Spanning Tree Protocol (RSTP)?

Accepted Answer

IEEE 802.1W

Answer

IEEE 802.1D

Answer

IEEE 802.1Q

Answer

IEEE 802.1S

Question 2

What is the primary improvement that RSTP provides over traditional STP?

Accepted Answer

Significantly faster convergence time

Answer

Support for a greater number of VLANs

Answer

Built-in traffic encryption

Answer

Reduced memory usage on switches

Question 3

In RSTP, which port role provides a redundant path to the Root Bridge and can quickly replace the Root Port if it fails?

Accepted Answer

Alternate Port

Answer

Backup Port

Answer

Designated Port

Answer

Root Port

Question 4

What does Cisco's Per-VLAN Spanning Tree Plus (PVST+) do differently from standard 802.1D STP?

Accepted Answer

It runs a separate STP instance for each VLAN, allowing per-VLAN Root Bridge placement

Answer

It runs a single STP instance shared across all VLANs

Answer

It disables STP on all trunk links to improve performance

Answer

It combines STP operation with routing protocols for redundancy

Question 5

What does the Cisco STP PortFast feature do when configured on a switch access port?

Accepted Answer

It allows the port to bypass Listening and Learning and go directly to Forwarding

Answer

It increases the physical link speed to maximum

Answer

It enables the port to participate in Root Bridge elections

Answer

It permanently places the port in a blocking state

Question 6

What action does BPDU Guard take when a BPDU is received on a PortFast-enabled port?

Accepted Answer

It places the port into an err-disabled state

Answer

It increases the port priority to absorb the BPDU

Answer

It logs the event and alerts the network administrator only

Answer

It converts the port to a trunk port automatically

Question 7

In RSTP, which port role is functionally equivalent to the Root Port in traditional 802.1D STP?

Accepted Answer

Root Port

Answer

Alternate Port

Answer

Designated Port

Answer

Backup Port