2025年最新の実際に出ると確認された 無料Huawei H12-821_V1.0試験問題
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質問 # 105
Which of the following statements regarding BGP route advertisement are false?
- A. All the BGP routes learned from all BGP peer will be advertised to other BGP peers.
- B. Only the optimal routes preferred by BGP can be advertised to other BGP peers.
- C. By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.
- D. Only the routes learned from IGPs can be advertised to other BGP peers.
正解：B
質問 # 106
Which of the following statements regarding different LSA types is false?
- A. LS Update packets contain complete LSA information.
- B. LS Request packets contain only LS Type, LS ID, and Advertising Router.
- C. DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.
- D. LS Ack packets contain complete LSA information.
正解：D
解説：
LS Ack (Link State Acknowledgment) packets are used to acknowledge received LSAs and do not contain complete LSA information. Instead, they contain only the headers of LSAs being acknowledged. This contrasts with LS Update packets, which carry full LSA details. The misunderstanding of LS Ack functionality makes this statement false .
質問 # 107
Which of the following routing protocols support the default route through command configuration?
- A. IS-IS
- B. ICMP
- C. BGP
- D. OSPF
正解：C
質問 # 108
Which of the following statements is false?
- A. If two devices have the same router priority, the device with a larger router ID has a higher election priority.
- B. If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.
- C. A device with a higher router priority has a higher election priority.
- D. When a router with the highest router priority joins an OSPF network, this router will become the new DR.
正解：B
質問 # 109
A Huawei firewall by default creates security zones named untrust, dmz, _________ and local. (Use Lowercase letters.)
正解：
解説：
TRUST
Explanation:
By default, Huawei firewalls create security zones named untrust, dmz, trust, and local. These zones facilitate security policies for inbound, outbound, and inter-zone traffic control .
質問 # 110
What is the correct procedure for a VLAN pool to assign terminals to VLANs.
正解：
解説：
質問 # 111
Which of the following statements regarding multicast MAC addresses are false?
- A. One multicast MAC address maps to 32 multicast IP addresses.
- B. One multicast MAC address maps to only one multicast IP address.
- C. The high 24 bits of the multicast MAC address are 0x01005E, the 25th bit is fixed to 1, and the lower
23 bits of the MAC address map to the lower 23 bits of the multicast IP address. - D. A multicast MAC address identifies receivers of a multicast group on the data link layer.
正解：B
解説：
One multicast MAC address maps to 32 multicast IP addresses due to the limited number of bits used in the mapping process. Specifically, the lower 23 bits of the MAC address map to the lower 23 bits of the multicast IP address, while the high 24 bits of the MAC address are fixed as 0x01005E. Thus, Option B is false .
質問 # 112
Which of the following statements regarding the display bgp routing-table command output is true?
- A. The route to the destination address 192.168.1.0 is learned through AS 200.
- B. The route to the destination address 192.168.1.0 is injected into the BGP routing table using the network command.
- C. The MED value of the route to the destination address 192.168.1.0 is 100.
- D. The route to the destination address 192.168.1.0 is not the optimal route in the BGP routing table.
正解：B
解説：
The Origin attribute in the display bgp routing-table output is marked as i, indicating that the route was injected into the BGP routing table using the network command. The other options are incorrect because the AS path is not displayed, the MED is 0, and the route is marked as the best (>), meaning it is the optimal route
.
質問 # 113
According to BGP route selection rules, the route with the higher Local_Pref is preferred.
- A. FALSE
- B. TRUE
正解：B
質問 # 114
Four routers run IS-IS and have established adjacencies. The area IDs and router levels are marked in the following figure. Which of the following statements is true?
- A. The LSDB of R1 does not contain the LSP of R4.
- B. The LSDB of R3 does not contain the LSP of R4.
- C. The LSDB of R2 does not contain the LSP of R3.
- D. The LSDB of R2 does not contain the LSP of R4.
正解：A
解説：
R1 is a Level-1 router in Area 49.0001, while R4 is in Area 49.0004. Level-1 routers only maintain LSDBs for their own area and do not contain LSPs from other areas, such as R4's LSP.
R2 is a Level-1-2 router, so it maintains LSDBs for both Area 49.0001 (Level-1) and Level-2 domains, which include LSPs from R4.
R3 and R4, as Level-2 routers, exchange LSPs with each other within the Level-2 domain.
Thus, the LSDB of R1 does not include R4's LSP .
質問 # 115
Which of the following statements about WLAN roaming are false?
- A. APs with which a STA is associated before and after roaming can work on different channels.
- B. During roaming, the STA sends an Association Request frame containing home AP information to the foreign AP.
- C. APs with which a STA is associated before and after roaming must work on the same channel.
- D. During roaming, the STA sends a Reassociation Request frame containing home AP information to the foreign AP.
正解：B、C
解説：
During WLAN roaming, the STA sends a Reassociation Request frame to the foreign AP to maintain connectivity. Association frames are used during initial connections, not roaming.
APs with which a STA is associated before and after roaming can work on different channels, as roaming often occurs across channels in environments like multi-SSID or multi-channel setups.Options C and D are false, as they contradict standard WLAN roaming procedures .
質問 # 116
Compress the 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF address.___________(if the answer contains letters, capitalize them.)
正解：
解説：
2001:DBB:B8:0:C030::9A0:CDEF
Explanation:
The IPv6 address 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF can be compressed by removing leading zeros in each segment and collapsing consecutive zero groups into ::. The result is 2001:DBB:B8:0:
C030::9A0:CDEF .
質問 # 117
STP ensures a loop-free network but has a slow network topology convergence speed, affecting communication quality. RSTP has made some improvements based on STP. Which of the following improvements is not included?
- A. The non-root switch running RSTP sends configuration BPDUs at the interval specified by the Hello timer, which is performed independently by each device.
- B. RSTP deletes three port states and adds two port roles.
- C. If a port does not receive configuration BPDUs from the upstream device within four Hello intervals, the switch considers that the negotiation with the neighbor fails.
- D. RSTP reduces five port states to three port states based on user traffic forwarding and MAC address learning.
正解：C
解説：
RSTP improves convergence by introducing changes to the BPDU handling mechanism and port roles.
However, RSTP does not rely on a fixed timeout of four Hello intervals for negotiation failure. Instead, RSTP uses a more dynamic mechanism to detect topology changes. The other options describe valid RSTP improvements .
質問 # 118
STAs stay on different subnets before and after Layer 3 roaming. To enable the STAs to access the original network after roaming, network engineers need to configure user traffic to be forwarded to the original subnet over a CAPWAP tunnel.
- A. FALSE
- B. TRUE
正解：B
解説：
In Layer 3 roaming scenarios, STAs (stations) remain on different subnets before and after roaming. To ensure that user traffic reaches the original subnet, it must be tunneled back over a CAPWAP tunnel. This technique prevents disruptions in communication and enables seamless roaming. Huawei's Layer 3 roaming design guidelines emphasize the use of CAPWAP tunnels for user traffic forwarding .
質問 # 119
When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit.
- A. FALSE
- B. TRUE
正解：A
質問 # 120
To enable PC1 to access PC2 using the IP address of the firewall's GE0/0/2, you need to configure NAPT for source address translation. In the following figure, fill in the blank to complete the command.
正解：
解説：
Explanation:
pat
trust
12.1.1.0
inner
質問 # 121
OSPF networks are classified into four types of networks by link layer protocol. Drag the following link layer protocols to the corresponding network types.(Token is reusable)
正解：
解説：
Explanation:
Network Types and Corresponding Link Layer Protocols
* Broadcast: Ethernet
* Point-to-Point (P2P): PPP, HDLC
* Point-to-Multipoint (P2MP): PPP
* Non-Broadcast Multi-Access (NBMA): Frame Relay
OSPF Network Types:OSPF classifies networks based on link layer protocols into the following types:
* Broadcast: This type assumes that all routers on the network can communicate directly with one another using multicast or broadcast frames. Ethernet networks are typical examples.
* Point-to-Point (P2P): This type is used for links that connect two routers directly. Common protocols include PPP (Point-to-Point Protocol) and HDLC.
* Point-to-Multipoint (P2MP): This type simulates multiple point-to-point connections over a single physical network, often used in WAN scenarios where PPP is employed.
* Non-Broadcast Multi-Access (NBMA): These networks connect multiple devices but lack native broadcast capability, such as Frame Relay.
質問 # 122
Which of the following statements regarding DR/BDR are false?
- A. In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.
- B. All DR others establish neighbor relationships with DR and BDR only.
- C. DR others listen on the multicast address 224.0.0.5.
- D. DR others listen on the network address 224.0.0.6.
正解：B
質問 # 123
The native AC function allows an agile switch to integrate AC capabilities, achieving wired and wireless convergence. The agile switch centrally manages wired and wireless service traffic.
- A. FALSE
- B. TRUE
正解：B
解説：
The native AC (Access Controller) function in Huawei's agile switches enables wired and wireless convergence. This integration allows the agile switch to act as both a wired network switch and a wireless controller, managing all traffic centrally. This architecture simplifies network management and improves efficiency, making the statement true .
質問 # 124
Drag the following VRRP states to the corresponding working mechanisms.
正解：
解説：
Explanation
Master
Backup
Master
Backup
質問 # 125
If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.
- A. FALSE
- B. TRUE
正解：B
解説：
When the router ID is configured in both the system view and the BGP view, the router ID in the BGP view takes precedence because BGP-specific configurations override global settings. This ensures that BGP operates with the most relevant configurations .
質問 # 126
A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane?
- A. Voltage monitoring
- B. System power-on and power-off control
- C. Temperature monitoring
- D. Fan control
正解：C
質問 # 127
On an OSPF network, if a router receives an update of an LSA that exists in the local LSDB, the router updates the LSDB and floods the LSA.
- A. FALSE
- B. TRUE
正解：A
解説：
OSPF LSA Flooding Mechanism
* If a router receives an LSA identical to one already in its LSDB, it does not flood the LSA again unless the LSA has changed (i.e., the sequence number or content has been updated).
* OSPF ensures efficient use of bandwidth by avoiding redundant flooding of unchanged LSAs.
HCIP-Datacom-Core Reference
* The OSPF LSDB synchronization process explains that unchanged LSAs are not reflooded, ensuring stability and resource optimization.
質問 # 128
To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non- backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.
- A. FALSE
- B. TRUE
正解：B
解説：
OSPF (Open Shortest Path First) mandates that the backbone area (Area 0) serves as the central area for routing information exchange. To avoid inter-area routing loops, routing information is only exchanged between the backbone area and non-backbone areas, not directly between two non-backbone areas.
Consequently, each Area Border Router (ABR) must connect to the backbone area to facilitate this routing exchange .
質問 # 129
See the command output of a router below. Which of the following statements is true?
<R2>display ospf interface GigabitEthernet 0/0/0 verbose
OSPF Process 1 with Router ID 10.0.2.2
Interface: 10.0.12.2 (GigabitEthernet 0/0/0)
Cost: 1 State: BDR Type: Broadcast MTU: 1500
Priority: 1
Designated Router: 10.0.12.1
Backup Designated Router: 10.0.12.2
Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1
- A. This router is a BDR.
- B. The interface cost is 1500.
- C. The router ID is 10.0.12.2.
- D. The interface IP address is 10.1.12.1.
正解：A
解説：
The output shows that the router with the IP 10.0.12.2 is the Backup Designated Router (BDR), as indicated in the State: BDR field. The router ID is 10.0.2.2, the interface cost is 1, and the IP address of the interface is
10.0.12.2. Hence, C is the correct answer .
質問 # 130
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Huawei H12-821_V1.0の試験は、60の複数選択の質問で構成されており、候補者はテストを完了するのに90分です。この試験は英語と中国語の両方で利用でき、指定されたテストセンターでオンラインまたは対面で撮影できます。試験に合格すると、候補者はHCIP-Datacom-Core Technology v1.0認定を受け取ります。これは、世界中の多くの大手IT組織や企業によって認められています。
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