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Huawei H12-811_V2.0 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Network O&M and Troubleshooting: Covers network operation and maintenance practices, common diagnostic tools, and methodologies for identifying and resolving network faults.
Topic 2
  • Data Center Network Basics: Covers the architecture and key technologies used in modern data center networks including virtualization and high-availability design concepts.
Topic 3
  • Network Security and Services: Covers essential network security mechanisms including ACLs, AAA, NAT, and basic firewall concepts to protect network infrastructure.
Topic 4
  • Typical Campus Networking Solution: Covers end-to-end campus network design scenarios, integrating switching, routing, security, and wireless technologies into a unified solution.

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Huawei HCIA-Datacom V2.0 Sample Questions (Q23-Q28):

NEW QUESTION # 23
On the switched network shown in the figure, STP is enabled on all devices. SW1 is the root bridge. The port costs are shown in the figure. Other parameters retain the default values. After the network is stable, which of the following RPC values is calculated by SW4 for the path to SW1?

Answer: B

Explanation:
SW1 is the root bridge, so SW4 calculates its Root Path Cost (RPC) based on the lowest cumulative STP cost path to SW1. The direct link from SW4 to SW1 has a cost of 50, which is lower than all alternative paths through SW3 or SW2. Therefore, SW4 selects the direct path, resulting in an RPC of 50.


NEW QUESTION # 24
On the network shown in the figure, R1 serves as the gateway for PC2 and PC3, and directly connects to S1 through a physical link. GE1/0/1 on S1 is configured as a trunk interface and permits traffic of VLANs 2 and
3. Its PVID retains the default value. Which of the following statements are true if PC2 and PC3 can communicate with each other? (Select all that apply)

Answer: A,B,D

Explanation:
This scenario describes the classic router-on-a-stick inter-VLAN routing design. A single physical interface on R1 connects to switch S1, and multiple sub-interfaces are created on that physical interface to serve as gateways for multiple VLANs. Therefore, if R1 provides Layer 3 gateway functions for VLAN 2 and VLAN
3, sub-interfaces such as GE0/0/1.2 and GE0/0/1.3 must be configured, so option A is correct.
Because PC2 and PC3 are connected to switch S1, S1 learns their source MAC addresses dynamically and stores them in its MAC address table, making option B correct. R1 receives tagged frames from different VLANs on the trunk link and, through its sub-interfaces, can identify and terminate frames for VLAN 2 and VLAN 3, so option C is also correct. Option D is incorrect because hosts in different VLANs do not need to be connected to different physical switches; VLAN separation is logical, not necessarily physical. HCIA- Datacom uses this deployment to explain inter-VLAN communication, 802.1Q trunking, and flexible campus gateway design using limited router interfaces.


NEW QUESTION # 25
Which of the following hosts are reachable to the host at 192.168.1.200/27 at Layer 2? (Select all that apply)

Answer: A,B,C

Explanation:
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.


NEW QUESTION # 26
On the network shown in the figure, all switches run STP. All links have a path cost of 20, and SW1 is the root bridge. What is the root path cost (RPC) of SW4?

Answer: C

Explanation:
The root path cost (RPC) of a switch is the total path cost from that switch to the root bridge along the selected spanning-tree path. Since SW1 is given as the root bridge, its RPC is 0. Each link in the topology has a path cost of 20. To determine SW4's RPC, you identify the shortest active STP path from SW4 to SW1.
Based on the topology used in the question, SW4 reaches SW1 through a path containing two links. Therefore, the total root path cost is 20 + 20 = 40, which makes option B correct. This is a standard STP calculation. HCIA-Datacom uses RPC as one of the main comparison parameters in root-port election on non-root switches. A lower RPC means a better path toward the root bridge. If multiple candidate ports have the same RPC, the switch then compares the sender's bridge ID and port ID. This question checks whether the learner understands that RPC is cumulative across the spanning-tree forwarding path and is not simply the cost of a single directly connected link unless the switch is directly attached to the root bridge.


NEW QUESTION # 27
When Telnet or the web system is used to manage a device, which of the following mechanisms can be deployed to allow only fixed user IP addresses to log in to the device?

Answer: C

Explanation:
An Access Control List (ACL) can filter packets based on specified matching conditions, including source and destination IP addresses.
Huawei ' s HCIA-Datacom training material explains that ACLs provide traffic classification and access- control capabilities.
To restrict remote management access, an administrator can configure ACL rules that permit connections originating from authorized management IP addresses and deny connections from other sources.
The ACL must be applied to the appropriate management service or user interface for the restrictions to take effect.
Option A is incorrect because telemetry is primarily used for collecting and reporting operational data.
Option C is incorrect because SNMP is designed for network monitoring and management rather than implementing the specified login-source filtering mechanism.
Option D provides authentication, authorization, and accounting, but it is not the direct mechanism requested for filtering specific source IP addresses.
Therefore, option B is correct.


NEW QUESTION # 28
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