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[General] Valid H12-891_V1.0 Test Forum & Trustworthy H12-891_V1.0 Practice

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【General】 Valid H12-891_V1.0 Test Forum & Trustworthy H12-891_V1.0 Practice

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Huawei H12-891_V1.0 (HCIE-Datacom V1.0) Certification Exam is a challenging exam that requires a significant amount of preparation. Candidates are expected to have a deep understanding of data communication technologies, including network protocols, routing, switching, and security. They should also be familiar with the latest industry trends and best practices. To pass the exam, candidates must demonstrate their ability to design, implement, and troubleshoot complex data communication networks.
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Huawei HCIE-Datacom V1.0 Sample Questions (Q245-Q250):NEW QUESTION # 245
An SRLB is a set of user-specified local labels reserved for SR-MPLS. These labels are locally configured and have only local significance. Therefore, they are not advertised through the IGP.
  • A. TRUE
  • B. FALSE
Answer: A
Explanation:
Understanding SRLB (Segment Routing Local Block)
# What is SRLB?
* SRLB (Segment Routing Local Block) is a range of local MPLS labels used by Segment Routing (SR-MPLS).
* These labels are only relevant to the local router and are not advertised to other routers.
# Key SR-MPLS Label Blocks:# SRGB (Segment Routing Global Block) - Globally significant labels shared among routers.# SRLB (Segment Routing Local Block) - Locally significant labels, not shared.
Why is the Answer TRUE?
# SRLB labels are only locally defined and are NOT distributed via IGP (OSPF or IS-IS).# They are used for local forwarding decisions within an SR-enabled router.# Only SRGB labels are advertised to ensure consistent global label assignment.
Real-World Application:
* Traffic Engineering (TE): Uses SRLB for custom local path optimizations.
* Segment Routing Networks: Ensures scalable MPLS forwarding without requiring full LDP signaling.
# Reference: Huawei HCIE-Datacom Guide - Segment Routing Label Blocks (SRGB & SRLB)

NEW QUESTION # 246
During the evolution from OSPFv2 to OSPFv3, LSA formats and functions remain unchanged, except that the network layer addresses in LSAs are changed from IPv4 to IPv6.
  • A. TRUE
  • B. FALSE
Answer: B
Explanation:
OSPFv3 (for IPv6) introduces significant changescompared toOSPFv2 (for IPv4).
While both versions share similarrouting mechanisms, there are keyLSA format and functional differencesbeyond just address changes.
Major Differences Between OSPFv2 and OSPFv3:
Address Independence (LSA Format Changes)
OSPFv3 LSAs do not contain IP addresses directly; they rely onLink-LSA and Intra-Area Prefix LSAto advertise addresses.
InOSPFv2, IP addresses were included in LSA headers.
New LSA Types in OSPFv3
LSA Type 8 (Link-LSA): Advertises a router's IPv6 address to neighbors.
LSA Type 9 (Intra-Area Prefix LSA): Replaces the address information in Router-LSAs and Network-LSAs.
Support for Multiple Address Families (AF)
OSPFv3 can supportboth IPv4 and IPv6in newer implementations (RFC 5838).
Authentication Mechanism Removed
OSPFv3 relies on IPsec for authentication, whereas OSPFv2 hadbuilt-in authentication mechanisms.
Incorrect Statement Explanation:
#The statement"LSA formats and functions remain unchanged"isfalsebecause:
LSA structures were modifiedin OSPFv3.
New LSA types were introducedto handle IPv6 addresses separately.
Reference from Huawei HCIE-Datacom Documentation:
Huawei OSPFv3 Configuration Guide - LSA Differences from OSPFv2
HCIE-Datacom Study Material - OSPFv3 Evolution & IPv6 Implementation

NEW QUESTION # 247
A client sends an HTTP request to a server, and the server sends back an HTTP response. Which of the following parameters isnotcarried in the HTTP response?
  • A. Protocol version
  • B. Status code
  • C. URI
  • D. Reason phrase
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
AnHTTP responsefrom the server to the client typically includes the following components:
Protocol version (C):Specifies the HTTP version used (e.g., HTTP/1.1).
Status code (B):Indicates the response result (e.g., 200 for OK, 404 for Not Found).
Reason phrase (A):A textual description associated with the status code (e.g., "OK", "Not Found").
Headers and Body:Contain additional information and the actual response content.
URI (D):TheUniform Resource Identifieris part of theHTTP requestand not theHTTP response. Therefore,Dis the correct answer.

NEW QUESTION # 248
InSRv6, each time a packet passes through anSRv6 endpoint node, theSegments Leftfield valuedecrements by
1, and theIPv6 DA changes.
  • A. TRUE
  • B. FALSE
Answer: A
Explanation:
Comprehensive and Detailed Explanation:
#SRv6 (Segment Routing over IPv6)works byencoding a segment list in the IPv6 header.
#How SRv6 Works:
TheSegments Leftfield indicates theremaining segmentsin the path.
Eachendpoint node processes the next segmentand decrementsSegments Leftby 1.
TheIPv6 Destination Address (DA) is updatedto the next segment.
Thus, the statement isTRUE.
#Reference:Huawei HCIE Datacom - SRv6 Packet Forwarding

NEW QUESTION # 249
DHCPv6 servers support additional configuration information such as DNS server addresses for hosts.
  • A. TRUE
  • B. FALSE
Answer: A

NEW QUESTION # 250
......
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