Huawei H12-811_V2.0 Practice Exam Questions & Answers (2026)

A /27 subnet mask is 255.255.255.224, which means each subnet contains 32 IP addresses. The subnet increments in blocks of 32 in the last octet: 0, 32, 64, 96, 128, 160, 192, 224. The address 192.168.1.200/27 belongs to the subnet 192.168.1.192/27.

For this subnet, the network address is 192.168.1.192, the broadcast address is 192.168.1.223, and the valid host range is from 192.168.1.193 to 192.168.1.222. Therefore, 192.168.1.221/27, 192.168.1.193/27, and 192.168.1.222/27 are all valid host addresses in the same subnet and are reachable at Layer 2 without routing. That makes A, C, and D correct.

Option B is not correct because 192.168.1.192/27 is the network address of the subnet and cannot be assigned to a host by default. This question checks IP subnetting and the ability to identify valid hosts within the same broadcast domain.

All four addresses can successfully ping 10.0.23.3, so the correct answer is A, B, C, D.

The key point is that the traffic policy is applied outbound on GE0/0/1 of R1, which is the interface facing S1. When S1 pings 10.0.23.3, the echo request travels from S1 to R1 and then to S2. The return echo reply from 10.0.23.3 comes back to R1 and is then sent outbound on GE0/0/1 toward S1. Therefore, the traffic policy examines the reply packets, not the original ping request packets.

In those reply packets, the source IP address is 10.0.23.3, and the destination is one of S1's loopback addresses. The ACL rules denying 10.0.1.1 and 10.1.1.1 as source addresses do not match these reply packets, because those addresses appear as destination addresses, not source addresses. In addition, the ACL contains rule permit ip, which permits all remaining IP traffic. As a result, replies to all four S1 addresses are forwarded successfully, so every listed address can ping 10.0.23.3.

According to the original topology and service-planning question, the required VLANs are VLAN 100, VLAN 101, and VLAN 102, so options A, B, and C are correct. In HCIA-Datacom campus design questions, VLAN planning is usually based on service separation, such as user services, voice services, wireless services, management services, or specific departmental segmentation. Each service type is assigned an appropriate VLAN so that broadcast domains are separated and policies can be applied more effectively.

The reason option D is not selected is that it does not match the service requirements shown in the original figure. VLAN planning must follow the actual service design rather than arbitrary numbering. HCIA-Datacom emphasizes that campus VLAN planning should align with traffic isolation, gateway design, security policy deployment, and future scalability. Proper VLAN assignment helps simplify troubleshooting, reduce unnecessary broadcasts, and support service-based policy enforcement. This question tests the ability to read a service topology and identify which VLANs are actually required by the depicted design rather than choosing extra VLANs that are not part of the planned campus solution.

On a non-root bridge, the root port is the port that receives the best BPDU toward the root bridge. STP selects the root port by comparing several parameters in order. The first important parameter is the root path cost (RPC), so option B is correct. If multiple ports have the same RPC, the switch then compares the bridge ID (BID) of the upstream device sending the BPDU, making option C correct. If those are still equal, the switch compares the port ID (PID) of the upstream sending port, so option D is also correct.

If all of those values remain identical from the switch's perspective, the device can finally compare the local port ID to determine which local interface becomes the root port, so option A is also correct. HCIA-Datacom teaches this comparison logic as part of STP election rules. The process ensures deterministic selection of a single root port on every non-root switch. Understanding the comparison sequence is essential for predicting STP topology behavior and for influencing port roles through path cost tuning or bridge-priority adjustments during campus network design and troubleshooting.

This statement is true. On a Huawei WAC, the number of APs that can go online is controlled by the available license resources. If a Fit AP fails to come online and the command display ap online-fail-record shows Insufficient license resources, it means the controller does not currently have enough licensed capacity to allow additional APs to register successfully.

In this case, the administrator must expand the license capacity or adjust existing license allocation so that the AP can be admitted. This is a common WLAN deployment issue, especially when new APs are added without first verifying the current AP license limit on the WAC. HCIA-Datacom troubleshooting methodology emphasizes interpreting controller diagnostics and fault records accurately. An AP can fail to go online for many reasons, including CAPWAP reachability problems, version mismatch, authentication issues, or licensing limitations. When the failure reason explicitly indicates insufficient license resources, the troubleshooting direction is clear: the controller's AP license capacity must be checked and, if necessary, increased. This question tests the ability to map a specific WAC alarm record to the correct operational response.