Chapter 4: Multiple Spanning Tree Protocol

Question 1

CST

Answer 1

Common Spanning Tree, A single spanning-tree instance for the entire network, as defined in the 802.1D standard

Question 2

IST

Answer 2

Internal Spanning Tree, the first MSTI in the MST protocol, the IST is responsbile for building a CST across all VLANs, regardless of their VLAN membership. The IST contains advertisements for other MSTIs in its BPDUs

Question 3

MSTI

Answer 3

Multiple Spanning Tree Instance, a single spanning-tree instance for a specified set of VLANs in the MST protocol.

Question 4

MST Region

Answer 4

A collection of MSTIs that operate in the same MST domain

Question 5

MST region boundary

Answer 5

Any switch port that connects to another switch in a different MST region or that connects to a traditional 802.1D or 802.1W STP instance.

Question 6

PVST Simulation Check

Answer 6

The process of ensuring that the MST region is the STP root bridge for all the VLANs or none of the VLANs. If the MST region is a partial STP root bridge, the port is shut down.