Spanning Tree Protocol Q/A's Flashcards Preview

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Flashcards in Spanning Tree Protocol Q/A's Deck (31)
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1

Rapid Per-VLAN Spanning Tree Protocol (RPVST+) prevents routing loops for each what in Spanning Tree Protocol?

Individual VLAN instance.

2

Rapid Per-VLAN Spanning Tree blocks what two states for faster convergence?

blocking and listening

3

The root port in Spanning Tree Protocol is directly connected to a?

The root bridge is selected by the highest or lowest path cost?

Root Bridge Switch

Lowest path cost

4

The designated port in Spanning Tree Protocol forward frames to what?

each LAN-Local area Network

5

The alternate port in Spanning Tree Protocol is the next available what, to the root bridge?

backup port

6

The blocking port in Spanning Tree Protocol does what with all frames received on that port?

discards

7

In order what are the five transitioning states of Spanning Tree Protocol?

Disabled
Blocking
Listening
Learning
Forwarding
Broken

8

In order what are the three transitioning states of RSTP-Rapid Spanning Tree Protocol?

Discarding "aka blocking port"
Learning
Forwarding

9

The Bridge Protocol Data Units-BPDU's contain what type of information frames in Spanning Tree Protocol?

spanning tree topology

10

The two things that determine the root bridge switch are the two lowest what?

Bridge ID

Priority

11

Spanning Tree Protocol takes about how long before port forwarding starts?

15 Seconds for Listening and 15 Seconds for Learning (30 seconds)

12

The default Bridge Priority Value for Spanning Tree Protocol is?

32768

13

When the priority value is tied in Spanning Tree Protocol, what is used instead for the selection process?

lowest MAC address

14

Is Spanning Tree Protocol a routing protocol and does it perform load balancing?

What are the two main purposes of Spanning Tree Protocol?

no

prevent loops + best forwarding path

15

In Spanning Tree Protocol the ports that face away from the Root Bridge are called what type of ports?

Designated Ports

16

Spanning Tree Protocol sends BPDU's to/from?

all ports

17

The main purpose of Spanning Tree "Root Guard"?

Prevent switch from becoming a root bridge

18

The ports on the root bridge are all what type of ports?

Designated ports

19

What are the two types of BPDU's?

Configuration BPDU
TCN (Topology Change Notification) BPDU

20

The root path cost is always zero on the root bridge? True/False

True

21

Root port is selected in what order?

lowest path cost
lowest system priority
lowest mac address
lowest port priority

22

What is a P2P port type?

port that connects to another network device (PC or Switch)

23

What is P2P edge port type?

port that specifies port fast is enabled

24

When root guard is enabled and a superior BPDU is received on a configured port what happens?

Port goes into a Err-Disabled state

25

Does Portfast disable TCN Topology Change Notifications for access ports. True/False

True

26

The use of spanning-tree portfast trunk should only be used when?

What should this command not be use with?

With ports that are connecting to a single host, ex server with on NIC.

switches, bridges, etc

27

What is the purpose of using BPDU filter?

block BPDU's from being transmitted out of a port

28

What is the purpose of STP Loop Guard?

prevent any alternative or root ports from becoming designated ports

29

What role does designated ports have?

forward data downstream to other switches/LANs

30

Why shouldn't loop guard be enabled on portfast-enabled ports?

conflicts with the root/alternative port logic