MST

Question 1

In MST, what does IST refer to?

Answer 1

Internal spanning tree–the area within a MST region. It resides on instance 0, and sends the actual MST BPDUs.

Question 2

Briefly describe MST.

Answer 2

Multiple spanning tree allows multiple VLANs to be mapped to instances, allowing the control of PVST+ without the strain on the CPU.

Question 3

What must the switches in a MST region agree upon?

Answer 3

MST region name, VLAN-instance mapping, and MST configuration number.

Question 4

Which protocol defines MST?

Answer 4

802.1s.

Question 5

In MST, switches are divided into ___.

Answer 5

Regions.

Question 6

How many instances can exist in a MST region?

Answer 6

16, 0-15.

Question 7

When CST interacts with MST, what instance is it placed into?

Answer 7

0.

Question 8

In MST, when a VLAN is not assigned to an instance, what will it be placed into automatically?

Answer 8

0.

Question 9

In MST, which instance will BPDUs actually be sent on?

Answer 9

0.

Question 10

How many VLANs can be mapped to MSTI 0?

Answer 10

As many as you want, 0-4096.