New H12-821_V1.0 Test Duration - H12-821_V1.0 Exam Overview

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q123-Q128):

NEW QUESTION # 123
Which of the following BGP attributes must not be included in the Update message of a BGP route? (Multiple choice)

A. Local-Preference
B. Origin
C. MED
D. AS_PATH

Answer: A,C

NEW QUESTION # 124
When the forwarding table entry is stored in the main control board, after the packet enters the interface board, the query and forwarding of the packet can be completed directly on the interface board, thereby improving the packet forwarding efficiency.

A. FALSE
B. TRUE

Answer: A

NEW QUESTION # 125
OSPF supports multiple processes. Multiple different OSPF processes can run on the same router. They do not affect each other and are independent of each other. The routing interaction between different OSPF processes is equivalent to the routing interaction between different routing protocols.

A. TRUE
B. FALSE

Answer: A

NEW QUESTION # 126
When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?

A. 1.1.1.2/16
B. 1.1.1.1/32
C. 1.1.1.1/24
D. 1.1.1.1/26

Answer: A,C

Explanation:
The prefix list permits the prefix 1.1.1.1/24 with a mask length greater than or equal to /26 and less than or equal to /32. This means only prefixes with the base 1.1.1.1 and mask lengths between /26 and /32 will be permitted. Routes like 1.1.1.2/16 and 1.1.1.1/24 do not meet the mask length criteria, so they will be denied.
Conversely, routes like 1.1.1.1/26 and 1.1.1.1/32 satisfy the condition and will be permitted .

NEW QUESTION # 127
OSPF neighbors have multiple states, such as Down, Init, 2-way, Loading, or Full. In which of the following states do OSPF routers negotiate the master and slave roles?

A. Exchange
B. 2-way
C. ExStart
D. Init

Answer: C

Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:
OSPF routers establish neighbor relationships and progress through various states during the adjacency formation process. TheExStart stateis where routers negotiate the master and slaveroles. This negotiation is critical because the master initiates the Data Description (DD) packet exchange process.
Here's a breakdown of the relevant OSPF states:
ExStart State:
This is the phase where the routers determine which one will act as the master and which will be the slave.
The decision is based on theRouter IDsof the two routers. The router with the higher Router ID becomes the master.
Exchange State:
After the master-slave roles are established, the routers exchange DD packets. These packets contain summaries of the LSAs in their respective LSDBs.
2-way State:
This state indicates that bidirectional communication has been established between the two routers, but it occurs before master-slave negotiation.
Init State:
This is an early state where a router has sent a Hello packet to its neighbor but has not yet received a Hello packet in response.
Key Point:
The negotiation of master and slave roles happens exclusively in theExStart state, makingD. ExStartthe correct answer.
References:
Huawei HCIA-Datacom Study Guide, Chapter on "OSPF Neighbor States".
RFC 2328 - OSPF Version 2 (Section 10.8).

NEW QUESTION # 128
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