Mod5.3

Question 1

The latest standard for spanning tree is contained in

Answer 1

IEEE-802-1D-2004

Question 2

What are the different versions of STP?

Answer 2

STP
PVST+ (Per-VLAN Spanning Tree)
RSTP (Rapid Spanning Tree Protocol)
8002.1D-2004,
Rapid PVST+
MSTP (Multiple Spanning Tree Protocol)
MST (Multiple Spanning tree)

Question 3

This is the original IEEE 802.1D version (802.1D-1998 and earlier) that provides a loop-free topology in a network with redundant links. Also called Common Spanning Tree (CST), it assumes one spanning tree instance for the entire bridged network, regardless of the number of VLANs.

Answer 3

STP

Question 4

____is a Cisco enhancement of STP that provides a separate 802.1D spanning tree instance for each VLAN configured in the network. It supports PortFast, UplinkFast, BackboneFast, BPDU guard, BPDU filter, root guard, and loop guard.

Answer 4

PVST+ (Per-VLAN Spanning Tree)

Question 5

__or IEEE 802.1w is an evolution of STP that provides faster convergence than STP.

Answer 5

Rapid Spanning Tree Protocol (RSTP)

Question 6

This is an updated version of the STP standard, incorporating IEEE 802.1w.

Answer 6

802.1D-2004

Question 7

This is a Cisco enhancement of RSTP that uses PVST+ and provides a separate instance of 802.1w per VLAN.

Answer 7

Rapid PVST+

Question 8

____is an IEEE standard inspired by the earlier Cisco proprietary Multiple Instance STP (MISTP) implementation.

Answer 8

MSTP

Question 9

___ is the Cisco implementation of MSTP, which provides up to 16 instances of RSTP and combines many VLANs with the same physical and logical topology into a common RSTP instance.

Answer 9

Multiple Spanning Tree (MST)

Question 10

__ increases the speed of the recalculation of the spanning tree when the Layer 2 network topology changes.

Answer 10

RSTP

Question 11

PORT STATES: The three state of STP (Disabled, Blocking, Listening) is considered as ___ in RSTP. Other states such as learning and forwarding are the same

Answer 11

Discarding

Question 12

PORT ROLES: Root port and Designated port is the same in both STP and RSTP. But the Blocked port in STP is considered as ____ and ____ in RSTP.

Answer 12

Backup Port and Alternate Port

Question 13

The __ port is a backup to s shared medium, such as a hub

Answer 13

backup port

Question 14

When a switch port is configured with ___, that port transitions from blocking to forwarding state immediately, bypassing the usual 802.1D STP transition states (the listening and learning states) and avoiding a 30 second delay

Answer 14

PortFast

Question 15

Because the purpose of PortFast is to minimize the time that access ports must wait for spanning tree to converge, it should only be used on ___

Answer 15

access ports (EX: Pc)

Question 16

PortFast is only for use on switch ports that connect to ___

Answer 16

end devices

Question 17

___should never be received on PortFast-enabled switch ports because that would indicate that another bridge or switch is connected to the port.

Answer 17

BPDUs

Question 18

___ immediately puts the switch port in an errdisabled (error-disabled) state on receipt of any BPDU. This protects against potential loops by effectively shutting down the port.

Answer 18

BPDU guard

Question 19

___ was and still is an Ethernet loop-prevention protocol.

Answer 19

STP