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[General] Latest H12-891_V1.0 Exam Duration | Simulations H12-891_V1.0 Pdf

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【General】 Latest H12-891_V1.0 Exam Duration | Simulations H12-891_V1.0 Pdf

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Huawei HCIE-Datacom V1.0 Sample Questions (Q75-Q80):NEW QUESTION # 75
Collecting information before a cutover helps you determine whether services are normal before and after the cutover.
  • A. TRUE
  • B. FALSE
Answer: A
Explanation:
Before performing anetwork cutover (migration or upgrade), it is essential to collectbaseline datato ensure that services operate normally before and after the change.
Importance of Pre-Cutover Information Collection:
Identifies Network Baseline- Helps comparepre-cutover and post-cutover performance.
Detects Hidden Issues- Ensures that no existing network issues interfere with the cutover process.
Prevents Service Interruptions- Ensures all dependent services are accounted for.
Provides Rollback Plan- If issues arise, administrators canrestore previous configurations.
Reference from Huawei HCIE-Datacom Documentation:
Huawei Network Change Management Guide - Pre-Cutover & Post-Cutover Best Practices HCIE-Datacom Training Material - Service Assurance & Risk Analysis

NEW QUESTION # 76
Drag theIPsec functionson the left to the corresponding function description on the right.

Answer:
Explanation:

Explanation:
A screenshot of a computer AI-generated content may be incorrect.

IPsec (Internet Protocol Security) provides secure communication over IP networks through several essential functions. Let's explain each function and its purpose:
1. Data Origin Authentication:
Description:The receiver verifies the identity of the sender.
This function ensures that the data received actually comes from the claimed source.
IPsec achieves this usingIKE (Internet Key Exchange)anddigital signatures.
TheAuthentication Header (AH)andEncapsulating Security Payload (ESP)support authentication.
Use Case:Verifying that a message claiming to be from a specific IP address is genuinely from that source.
2. Data Encryption:
Description:The sender encrypts the data, and the receiver decrypts the data.
Encryption ensuresdata confidentialityby transforming readable data (plaintext) into unreadable data (ciphertext).
Only the intended receiver with the correct decryption key can convert the ciphertext back to plaintext.
Common encryption algorithms used includeAES (Advanced Encryption Standard)andDES (Data Encryption Standard).
Use Caserotecting sensitive data transferred over public networks.
3. Data Integrity:
Description:The receiver verifies received data to determine whether the data has been tampered with.
Ensures that the data was not altered during transmission.
Uses cryptographichash functions(e.g.,SHA-1, SHA-256) to generate amessage digest.
The digest is sent with the data and verified on the receiving side.
Use Caseetecting any changes made to the data packet during transmission.
4. Anti-Replay:
Description:The receiver rejects duplicate data packets.
Prevents attackers from capturing packets and replaying them later.
Usessequence numbersto detect replayed or duplicated packets.
The receiver keeps asliding windowof sequence numbers to compare incoming packets.
Use Case:Blocking malicious actors from sending previously intercepted packets to disrupt communication.
Why This Mapping Is Correct:
The functions and descriptions are aligned based on the core concepts of IPsec and the roles they play in ensuring secure data transmission.
Each function addresses a specific aspect of security:authentication, confidentiality, integrity, and replay protection.

NEW QUESTION # 77
Which of the following are used in Ethernet?
  • A. 8025 encapsulated frames
  • B. CSMA/CD in multiplexed interviews
  • C. A MAC address in a non-canonical format
  • D. Mac address in canonical format
  • E. 8023 Encapsulated Frame
Answer: B,D,E

NEW QUESTION # 78
In Huawei's NAC solution, which of the following cannot be used for Portal authentication?
  • A. Passcode
  • B. SMS verification code
  • C. User name and password
  • D. User's MAC address
Answer: D
Explanation:
Huawei'sNetwork Access Control (NAC)Portal authentication supports various identity authentication methods for user login via a web page. These include:
Username and password- standard method.
Passcode- one-time password or PIN.
SMS verification code- users receive a dynamic code via SMS for identity verification.
However:
MAC addressauthentication is used inMAC-based authentication, not Portal. MAC authentication allows a device to be authenticated using its MAC address without user interaction (i.e., not via a Portal page).
Correct answer: D. User's MAC address

NEW QUESTION # 79
The following is correct about the LSA of OSPFv3
  • A. The Link State ID of inter-area prefix-SA, which contains prefix information
  • B. Inter-Area PrefirLSA also contains LinkLocal Information
  • C. Router-LSA and Network-LSA do not contain routing information
  • D. When the Referenced Link State Type-2 of the Intra-AreaPrefixLSA, referenced Link State ID Contains the interface ID of the DR
Answer: C,D

NEW QUESTION # 80
......
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