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[General] Exam H12-891_V1.0 Simulations - H12-891_V1.0 Latest Braindumps Free

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【General】 Exam H12-891_V1.0 Simulations - H12-891_V1.0 Latest Braindumps Free

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Huawei HCIE-Datacom V1.0 Sample Questions (Q12-Q17):NEW QUESTION # 12
In thefirewall hot standby scenario, in which of the following conditions will the local deviceproactively send VGMP packets?
  • A. Hot standby being disabled
  • B. Link detection packet timeout
  • C. Priority increase
  • D. Hot standby being enabled
Answer: D
Explanation:
Comprehensive and Detailed Explanation:
VGMP (Virtual Group Management Protocol)is used inHuawei firewallsforhot standby and high availability.
When is VGMP Activated?#Whenhot standby is enabled, firewalls must synchronize their states to maintain failover capability.##VGMPsends packets periodicallyto check if the standby firewall is operational.
Why Other Options Are Incorrect?#Priority increase (B)oes not trigger VGMP packets directly.#Link detection timeout (C):Affects failover but does not initiate VGMP packets.#Hot standby being disabled (A):
Disables VGMP, preventing packets from being sent.
Thus, the correct answer isD.
#Reference:Huawei HCIE Datacom - Firewall Hot Standby and VGMP

NEW QUESTION # 13
A VGMP packet is encapsulated with a UDP header and a VGMP header. By default, a VGMP packet uses UDP port _____.
Answer:
Explanation:
512
Explanation:
Understanding VGMP (Virtual Gateway Management Protocol)
#What is VGMP?
VGMP (Virtual Gateway Management Protocol) is used in Huawei firewalls to manage hot standby (HRP - Hot Standby Routing Protocol).
Ensures that theactive and standby firewalls synchronize their statesfor high availability.
#How Does VGMP Work?
TheActive and Standby firewalls exchange VGMP packetsto maintain state synchronization.
These packets are encapsulatedwithin UDPfor transport.
Thedefault UDP port for VGMP is 512.
Why is the Answer 512?
#Huawei firewalls use UDP port 512 by default for VGMP communication.
#This ensures that VGMP heartbeats and synchronization messages are correctly processed.
Real-World Application:
Enterprise Firewalls:VGMP ensuresfailover between active and standby firewalls.
Carrier-Grade Firewalls:UsesVGMP with HRP to achieve zero-downtime firewall redundancy.
#Reference:Huawei HCIE-Datacom Guide - VGMP and HRP High Availability Mechanisms

NEW QUESTION # 14
0SPFV2 is running on the IPV4 network IGP: OSPF3 is running in the IPV6 network, OSPF35 OSPFV2 has the same message type. Includes hello messages, DOD messages, LSR messages, LAU messages, and SAX messages about OSPP The following statement is correct?
  • A. The hello packet of OSPFv3 carries the IPV6 address prefix of the router interface
  • B. OSPFv3 uses the link-local address as the source address for sending packets, which can be forwarded outside the range of the originating link
  • C. OSPFv3 uses the authentication field of the packet header to complete the packet authentication
  • D. OSPFv3 sends OSPFv3 packet using the IPV6 multicast addresses FF02::5 and FF02
Answer: D

NEW QUESTION # 15
An LSR (Label Switching Router) supports various label retention modes. Which of the following statements regarding the liberal mode are correct?
  • A. An LSR retains labels from a neighboring LSR only when the neighbor is its next hop.
  • B. An LSR reserves all labels distributed by its neighbor.
  • C. The liberal mode requires more memory and label space.
  • D. This label retention mode saves memory and label space.
Answer: B,C
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 # 16
What are the problems with manually creating static VXLAN tunnels in campus networks? Multi-select
  • A. VTEP can only learn remote MAC addresses in a way that relies on data flooding
  • B. Although the static VXLAN tunnel mode can support distributed gateway application scenarios, the configuration workload is large and the configuration adjustment is complex
  • C. Static VLAN tunnel also uses related protocols on the control plane, which will cause equipment resource loss
  • D. N devices to establish static VXLAN tunnels, you need to manually configure up to N(N-1)/2 tunnels, the amount of configuration is large
Answer: A,B,D

NEW QUESTION # 17
......
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