HCIP-Datacom H12-821_V1.0 Dumps PDF

The MED (Multi-Exit Discriminator) is an optional, non-transitive attribute used to influence the exit path. MED is considered after attributes such as Local-Preference, AS-Path, and Origin during route selection. By default, if a MED value is missing, it is treated as 0 unless the bestroute med-none-as-maximum command is configured to treat it as 4294967295 ​.

 GMP Snooping Proxy

IGMP snooping proxy allows the switch to substitute for upstream Layer 3 devices and downstream hosts, reducing unnecessary bandwidth consumption by consolidating IGMP messages.

 HCIP-Datacom-Core Reference

The IGMP snooping proxy functionality is described in multicast optimization and IGMP configuration chapters​​

A is false – Ports in MSTP can have different roles and states in different MSTIs. Each MSTI can independently elect a root and compute its own topology, which results in different port states per MSTI .

B is true – MSTIs use the same spanning tree algorithm as STP (and RSTP) for calculating the spanning tree topology.

C is true – Each MSTI may have a different root bridge and separate topology, depending on VLAN mappings.

D is true – MSTIs do not independently send BPDUs; only MSTI 0 (CIST) actually sends BPDUs, and information about other MSTIs is encapsulated within it. So the statement is worded to test conceptual understanding , but not incorrect in MSTP context as framed.

Reference from Huawei HCIP-Datacom-Core Technology Study Guide:

“MSTP allows different MSTIs to have different topologies. A port may be forwarding in MSTI 1 but blocking in MSTI 2. This independence improves VLAN-based traffic engineering.”

(Chapter: MSTP Concepts – Section: MSTI Behavior and Port Roles)