Company uses MSTP within their switched LAN. What is the main purpose of Multiple Instance Spanning Tree Protocol (MSTP)?
A.
To enhance Spanning Tree troubleshooting on multilayer switches
B.
To reduce the total number of spanning tree instances necessary for a particular topology
C.
To provide faster convergence when topology changes occur in a switched network
D.
To provide protection for STP when a link is unidirectional and BPDUs are being sent but not received
Explanation:
MST is built on the concept of mapping one or more VLANs to a single STP instance. Multiple instances of STP can be used (hence the name MST), with each instance supporting a different group of VLANs.
Each could be tuned to result in a different topology, so that Instance 1 would forward on the left uplink, while Instance 2 would forward on the right uplink. Therefore, VLAN A would be mapped to Instance 1,and VLAN B to Instance 2. To implement MST in a network, you need to determine the following:
1. The number of STP instances needed to support the desired topologies.
2. Whether to map a set of VLANs to each instance.