Pass the Huawei HCIP-Datacom H12-821_V1.0 Questions and answers with ValidTests

Based on the MSTP configuration shown, the role of the switch in MSTI 1 cannot be determined without additional details about the topology or priority values of other switches in the instance. The role could be a root switch, secondary root, or non-root, depending on these factors ​.

IS-IS uses a two-level hierarchy:

Level-1 routersoperate within a single area and cannot exchange routing information with routers in other areas directly.

To reach external areas (the IS-IS backbone or other areas), Level-1 routers rely onLevel-1-2 routers, which perform inter-area route redistribution.

Therefore, a Level-1 routermust use a Level-1-2 routeras a gateway to reach destinations outside its own area.

Network Types and Corresponding Link Layer Protocols

Broadcast: Ethernet

Point-to-Point (P2P): PPP, HDLC

Point-to-Multipoint (P2MP): PPP

Non-Broadcast Multi-Access (NBMA): Frame Relay

 OSPF Network Types:

OSPF classifies networks based on link layer protocols into the following types:

Broadcast: This type assumes that all routers on the network can communicate directly with one another using multicast or broadcast frames. Ethernet networks are typical examples.

Point-to-Point (P2P): This type is used for links that connect two routers directly. Common protocols include PPP (Point-to-Point Protocol) and HDLC.

Point-to-Multipoint (P2MP): This type simulates multiple point-to-point connections over a single physical network, often used in WAN scenarios where PPP is employed.

Non-Broadcast Multi-Access (NBMA): These networks connect multiple devices but lack native broadcast capability, such as Frame Relay.

The CAPWAP heartbeat detection interval is typically multiplied by a predefined factor to determine the switchover time. For instance, in Huawei devices, a common default is three missed heartbeats before a switchover is triggered. With a detection interval of 20 seconds, the switchover occurs after 60 seconds (20 x 3). This ensures that transient network issues do not cause unnecessary switchovers ​.

On Huawei devices, multiple BGP processes can be configured on the same router, but they are typically used for specific use cases such as multi-instance deployments or virtual routers. This flexibility is supported by Huawei's routing protocols ​.

A is correct– Removing unused accounts helpsminimize the risk surface.

B is false– Email isnot a secure methodfor transferring sensitive information like passwords, even if encrypted.

C is correct–Unique administrator accountshelp with accountability and tracking.

D is false–Long-term password validityreduces security. Passwords should be rotated regularly.

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

“To secure admin access, avoid account sharing, delete inactive users, and periodically update credentials through secure channels.”

(Chapter: Device Security – Section: Account Management)

 Link fault alarm

 The BFD session goes down.

 Interrupted OSPF neighbor relationship

BFD (Bidirectional Forwarding Detection)is a lightweight protocol that providesrapid detectionof faults in the forwarding path between two routers or switches.

It worksin conjunction with routing protocolsand provides fast failure detection to enable quick route convergence.

Protocol support:

B. BFD for static routes– Supported. BFD tracks the reachability of next-hop addresses and can trigger route removal upon failure.

C. BFD for OSPF– Supported. BFD can be associated with OSPF to accelerate the detection of neighbor failures.

D. BFD for BGP– Supported. BFD enables sub-second detection of BGP peer failures.

A. BFD for PIM–Not supported. PIM (Protocol Independent Multicast) typically does not use BFD for neighbor failure detection.

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

“BFD can be associated with static routes, OSPF, IS-IS, BGP, and other protocols to quickly detect link or device faults and trigger fast rerouting.”

(Chapter: High Availability Technologies – Section: BFD Principles and Applications)

 Transitive vs. Non-Transitive Attributes

The Community attribute is atransitive optional attribute, meaning that if a router receives a route with this attribute and does not understand its purpose, the router retains and propagates it to other peers.

Other options, such as AS_Path and MED, are well-defined mandatory or optional attributes with specific purposes.

 HCIP-Datacom-Core Reference

The behavior of optional transitive attributes is detailed in the BGP protocol and attribute chapters​​.

The Forwarding Information Base (FIB) is derived from the router's routing table and contains the exact forwarding entries used to route packets. It directly guides packet forwarding decisions by matching incoming packets with the correct output interface or next-hop address ​.