[2025年03月24日] H12-821_V1.0 PDFで最近更新された問題です集試験点数を伸ばそう
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質問 # 96
Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.
- A. FALSE
- B. TRUE
正解：A
質問 # 97
Multiple BGP processes cannot be configured on the same router.
- A. FALSE
- B. TRUE
正解：A
解説：
On Huawei devices, multiple BGP processes can be configured on the same router, but they are typically used for specific use cases such as multi-instance deployments or virtual routers. This flexibility is supported by Huawei's routing protocols .
質問 # 98
BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
解説：
BFD control packets are encapsulated in UDP packets, and the destination port number for multi-hop BFD control packets is 4784. This is a standardized port for multi-hop BFD operation .
質問 # 99
In BGP, Notification messages are used to request peers to resend routing information after routing policies are changed.
- A. FALSE
- B. TRUE
正解：A
解説：
Notification Message Purpose
* BGP Notification messages are used to report errors or terminate a connection. They do not request peers to resend routing information after routing policies are changed.
* Routing updates following policy changes require manual resynchronization, not Notification messages.
HCIP-Datacom-Core Reference
* The purpose and usage of Notification messages are discussed in the BGP operation chapters.
質問 # 100
Which of the following statements regarding the BGP error display of a router is false?
- A. The neighbor address of this router is 10.1.1.2.
- B. The error occurred at 11:40:39 on March 22, 2010.
- C. The error may be caused by the incorrect peer AS number.
- D. Error Type indicates that the BGP error is caused by the neighbor relationship error.
正解：B
解説：
The provided BGP error display shows the error timestamp as 12:40:39 on March 22, 2010. The error message confirms a mismatch in the peer AS number, as indicated in the "Incorrect remote AS" error info.
This eliminates options related to other causes, and the timestamp in Option A is incorrect .
質問 # 101
Which of the following PIM protocol packets have unicast destination addresses.
- A. Bootstrap
- B. Assert
- C. Graft
- D. Register Stop
正解：C、D
解説：
In the PIM protocol, Register Stop and Graft messages are sent with unicast destination addresses, typically to specific neighbors or RP (Rendezvous Point) routers. Other messages like Bootstrap and Assert use multicast addresses for broader dissemination across the network .
質問 # 102
In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA.
- A. FLASE
- B. TRUE
正解：A
解説：
Inter-area route calculation in OSPF involves Summary LSAs (Type 3) for summarizing routes across areas and ASBR Summary LSAs (Type 4) for locating ASBRs. While Router LSAs and Network LSAs describe the internal structure of an area, they do not directly participate in inter-area route calculation. Thus, the statement that only Router, Network, and Summary LSAs are involved is false .
質問 # 103
Compress the 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF address.___________(if the answer contains letters, capitalize them.)
正解：
解説：
pending
質問 # 104
Which of the following TLVs is used by ISIS to describe the IP address of an interface?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
質問 # 105
What is the default sending interval of BFD packets?
- A. 10s
- B. 5s
- C. 100ms
- D. 1000ms
正解：C
解説：
The default sending interval for BFD (Bidirectional Forwarding Detection) control packets is 100 milliseconds. This interval ensures rapid detection of link faults, providing fast failover and minimizing downtime in network operations .
質問 # 106
Which of the following statements regarding OSPF route summarization commands are true?
- A. The asbr-summary command is executed in the OSPF view.
- B. Not-advertise is the default parameter of the abr-summary command. That is, if advertise is not specified in the abr-summary command, the not-advertise parameter takes effect by default.
- C. Advertise is the default parameter of the abr-summary command. That is, if not-advertise is not specified in the abr-summary command, the advertise parameter takes effect by default.
- D. The abr-summary command is executed in the OSPF area view.
正解：A、C、D
解説：
The asbr-summary command is executed in the global OSPF view to summarize external routes. The abr- summary command is executed in the OSPF area view to summarize routes between areas. By default, the advertise parameter is enabled unless explicitly overridden by the not-advertise option .
質問 # 107
There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.
正解：
解説：
SPT
* Routing Entries in PIM
* (S, G) entries: Represent the shortest path tree (SPT) from a specific source (S) to a specific multicast group (G). These entries are created after data packets are transmitted directly from the source to the receivers.
* (S, G) entries are used in both PIM-DM and PIM-SM modes.
* PIM-DM and PIM-SM Modes
* In PIM-DM, multicast traffic is initially flooded throughout the network and pruned where no receivers exist. (S, G) entries represent source-specific paths created after the flooding stage.
* In PIM-SM, multicast traffic initially flows through a shared tree, but (S, G) entries are created when the network switches to the SPT for more efficient forwarding.
* HCIP-Datacom-Core Reference
* The functionality and application of (S, G) routing entries are detailed in multicast and PIM configuration chapters.
質問 # 108
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?
- A. AC2
- B. None
- C. AC1
- D. Random access
正解：A
解説：
In dual-link MSB networking with load balancing, the new AP will connect to the AC with the lower number of connected APs. In this case, AC2 has only 20 connected APs, while AC1 has 100. Therefore, the new AP will connect to AC2 .
質問 # 109
IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query.
- A. TRUE
- B. FALSE
正解：A
解説：
IGMPv3 builds on IGMPv1 and IGMPv2 by supporting all previous query types, including General Query and Group-Specific Query, while introducing Source/Group-Specific Query. This enhancement allows finer control over multicast group membership .
質問 # 110
Which of the following statements regarding the firewall zone security level is false?
- A. Two zones cannot be configured with the same security level.
- B. The configured security level cannot be changed.
- C. Only the security level of the user-defined zone can be configured.
- D. The default security level of the new zone is 1.
正解：B
解説：
In Huawei firewalls, the security level of a zone can be reconfigured by an administrator, making the statement that it cannot be changed false. Other statements accurately describe security level restrictions or defaults .
質問 # 111
On an OSPF network, interfaces are classified into four types based on link layer protocols. Which of the following types can interfaces on an IS-IS network be classified into based on physical links?
- A. P2MP
- B. P2P
- C. Broadcast
- D. NBMA
正解：B、C
解説：
IS-IS Interface Types
* IS-IS interfaces are categorized based on physical link characteristics:
* Point-to-Point (P2P): Direct connections between two routers.
* Broadcast: Shared medium networks where multiple routers communicate.
Incorrect Options
* C. P2MP and D. NBMA are not standard interface classifications in IS-IS.
HCIP-Datacom-Core Reference
* IS-IS physical link classifications are elaborated in IS-IS link configuration sections.
質問 # 112
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