Download HCIP-Datacom-Core Technology V1.0.H12-821.ExamTopics.2026-07-18.45q.vcex

Vendor: Huawei
Exam Code: H12-821
Exam Name: HCIP-Datacom-Core Technology V1.0
Date: Jul 18, 2026
File Size: 2 MB
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Demo Questions

Question 1
See the network shown in the following figure. R1 and R2 run IS-IS, and establish an adjacency. IS-IS is enabled on Loopback0 of R2 but disabled on Loopback3 of R2. The configurations shown in the figure are performed in the IS-IS process of R2. Which of the following statements are true? (Choose all that apply.)
  1. The routing table of R1 contains the route 10.0.2.3/32.
  2. The routing table of R1 does not contain the route 10.0.2.3/32.
  3. The routing table of R1 does not contain the routes 10.0.2.2/32 and 10.0.2.3/32.
  4. The routing table of R1 contains the route 10.0.2.2/32.
Correct answer: B, D
Question 2
As shown in the figure, VRRP is associated with a BFD session. When a backup device detects a fault through BFD, the backup device immediately assumes the master role after the Master_Down_Timer timer expires.
  1. TRUE
  2. FALSE
Correct answer: A
Question 3
IS-IS and OSPF are both link-state IGPs, but they have some differences. Which of the following statements are true about the comparison between IS-IS and OSPF? (Choose all that apply.)
  1. IS-IS has higher scalability than OSPF and supports network layer protocols including IPv4 and IPv6.
  2. IS-IS and OSPF work at different layers. IS-IS works at the data link layer, whereas OSPF works at the network layer.
  3. Each IS-IS router belongs to only one area. The backbone area consists of Level-1-2 and Level-2 routers.
  4. IS-IS supports more network types than OSPF.
Correct answer: A, D
Question 4
A router uses an advanced ACL to filter data. The ACL configuration is shown below. Which of the following statements is false about the configuration?
[Huawei] ad 3001
[Huawei-ad-adv-3001] rule permit icmp source 192.168.1.3 0 destination 192.168.2.0 0.0.0.255
  1. The ACL denies ICMP packets from host 192.168.1.2 to network segment 192.168.2.0/24.
  2. The ACL permits IP packets from host 192.168.1.3 to network segment 192.168.2.0/24.
  3. The ACL is a numbered ACL whose number is 3001.
  4. The ACL permits ICMP packets from host 192.168.1.3 to host 192.168.2.200.
Correct answer: D
Question 5
In inter-AC roaming scenarios, an AC can function as the mobility server of multiple mobility groups, but can be added only to one mobility group.
  1. TRUE
  2. FALSE
Correct answer: B
Question 6
On a broadcast IS-IS network shown in the following figure, a DIS needs to be elected to create and update pseudonodes. Which of the following routers is elected as the DIS?
  1. R1
  2. R2
  3. R3
  4. R4
Correct answer: A
Question 7
On an MSTP network, multiple MSTIs are created on four switches to implement load balancing. After the configuration is complete, the display stp brief command is run on the four switches. The figure shows the command outputs. Which of the following statements is true about the network?
  1. Ethernet0/0/1 on SW3 is an edge port.
  2. SW1 is the root bridge of MSTI 1.
  3. Three MSTIs are created.
  4. GigabitEthernet0/0/2 on SW2 cannot forward data.
Correct answer: D
Question 8
The following figure shows the 0SPF network of an enterprise and the OSPF configurations of R1. Which of the following statements is false about the network?
  1. R2 can access the server.
  2. GE 0/0/1 of R1 cannot accept OSPF packets.
  3. GE 0/0/1 of R1 cannot send OSPF packets.
  4. The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.
Correct answer: B
Question 9
ACLs are a common tool for matching routes. ACLs are classified into multiple types based on ACL rule functions. An ACL can be identified by a number, and the number range for each type of ACLs is different. Which of the following type of ACLs are numbered from 4000 to 4999?
  1. User-defined ACL
  2. Advance ACL
  3. Basic ACL
  4. Layer 2 ACL
Correct answer: B
Question 10
The VRID of the VRRP virtual router is 3 and the virtual IP address is 100.1.1.10. What is the virtual MAC address?
  1. 01-00-5Е-00-01-64
  2. 01-00-5Е-00-01-03
  3. 00-00-5Е-00-01-64
  4. 00-00-5Е-00-01-03
Correct answer: A
Question 11
Which of the following scenarios is not suitable for deploying interface PBR?
  1. A core switch needs to forward traffic between the intranet and extranet to an AC device that connects to the core switch in off-path mode.
  2. A core switch needs to forward the traffic between the intranet and extranet to a security detection device that connects to the core switch in off-path mode.
  3. A device needs to modify the next-hop IP address for locally originated traffic.
  4. On an enterprise network with multiple ISP outbound interfaces, each internal network segment accesses the Internet through a particular ISP outbound interface.
Correct answer: D
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