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Huawei HCIE-Datacom V1.0 Sample Questions (Q242-Q247):
NEW QUESTION # 242
Network Quality Analysis (NQA) is a real-time network performance detection and measurement technology.
It monitors the performance of multiple protocols running on a network. Which of the following protocols can be monitored by NQA?
Answer: A
Explanation:
Huawei'sNQA (Network Quality Analysis)provides tools to test and monitor network performance such as latency, jitter, and packet loss. The supported test types include:
ICMP- For reachability and round-trip time testing.
UDP,TCP,HTTP,FTP, etc.
DNS,VoIP,DHCP(limited to simulation, not monitoring protocol status itself) Protocols likeSNMPandOSPFarenot directly monitored by NQA, as these aremanagement or control plane protocols, not data-path or performance-measurable protocols.
Correct answer: C. ICMP
NEW QUESTION # 243
An LSR (Label Switching Router) supports various label retention modes. Which of the following statements regarding the liberal mode are correct?
Answer: B,D
Explanation:
Understanding MPLS Label Retention Modes
In MPLS (Multiprotocol Label Switching), a Label Switching Router (LSR) can operate in one of two label retention modes:
1## Liberal Label Retention Mode (LLRM)
* Stores all labels received from neighbors, even if they are not immediately used.
* Advantage: Fast convergence during link failures.
* Disadvantage: Consumes more memory & label space.
2## Conservative Label Retention Mode (CLRM)
* Only keeps labels for the best next-hop path.
* Advantage: Saves memory & label space.
* Disadvantage: Slower convergence when topology changes.
Why are C and D Correct?
# C. An LSR reserves all labels distributed by its neighbor.
* Correct: In Liberal Mode, the router accepts and stores all labels received, even for non-best paths.
# D. The liberal mode requires more memory and label space.
* Correct: Since the router keeps all labels, it requires higher memory & storage.
Why are A and B Incorrect?
# A. An LSR retains labels from a neighboring LSR only when the neighbor is its next hop.
* Incorrect: This describes Conservative Mode, not Liberal Mode.
# B. This label retention mode saves memory and label space.
* Incorrect: Liberal Mode consumes more memory, not less.
Real-World Application
* Liberal Mode is used in large-scale MPLS networks where fast failover is critical.
* Conservative Mode is preferred in memory-constrained environments.
# Reference: Huawei HCIE-Datacom Study Guide - MPLS Label Retention Modes
NEW QUESTION # 244
How do IGMPv2 routers maintain cinderband group membership? Multi-select
Answer: C,D
NEW QUESTION # 245
When the IPv6 address of a host is configured with a stateless address configuration, and other parameters other than the address are obtained through DHCPv6, how to set the M and 0 bits in the RA message ?
Answer: C
NEW QUESTION # 246
In OSPF, an ABR translates all Type 7 LSAs in a Not-So-Stubby Area (NSSA) into Type 5 LSAs.
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
InOSPF, a Not-So-Stubby Area (NSSA) is a type of area that allows for the injection ofexternal routes(like a standard area) while maintaining some stub area characteristics.
Type 7 LSAs (NSSA External LSAs)are generated by ASBRs within an NSSA.
AnABRat the NSSA boundary translates theseType 7 LSAs into Type 5 LSAsto propagate them into the rest of the OSPF domain.
This translation is necessary becauseType 5 LSAsare the standard method for advertising external routes in OSPF.
Therefore, the statement isTRUE.
NEW QUESTION # 247
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