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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIA-Datacom V2.0 |
| Exam Number: | H12-811_V2.0-ENU |
| Exam Duration: | 90 minutes |
| Passing Score: | 600/1000 |
| Certificate Validity Period: | 3 years |
| Related Certifications: | HCIA-Datacom |
| Available Languages: | English, Chinese |
| Real Exam Qty: | 60 |
| Exam Price: | $200 USD |
| Exam Format: | Drag-and-drop, Simulation, Multiple-choice, Multiple-response |
| Sample Questions: | Huawei H12-811_V2.0 Sample Questions |
| Exam Way: | Available at Pearson VUE test centers (offline) or online proctored exam. |
| Pre Condition: | No prerequisites required; candidates can register directly. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/cert/#/cert/Details/68381b0d8e534a6a9339761047279030 |
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問題 #22
When a Huawei network device functions as a Telnet server, which of the following are possible causes of a client falling to log in to the Telnet server? (Choose all that apply.)
答案：A,B,D
解題說明：
A Telnet login failure can occur due to multiple reasons related to reachability, service configuration, or device setup. If the network between the client and the server is unreachable, the TCP-based Telnet session cannot be established. If the user interface (VTY lines) is not configured to allow Telnet access, login attempts will be rejected. Similarly, if the Telnet server function is not enabled on the device, remote Telnet connections cannot be established. The source interface configuration is not required for basic Telnet server functionality, so it is not a common cause of login failure.
問題 #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 ports are alternate ports? (Choose all that apply.)
答案：A,C
解題說明：
To find the alternate ports, we first identify the quickest path to the root bridge, SW1, for every other switch. SW2 reaches the root directly through its top port with a cost of 30. SW3 has the fastest direct path with a cost of 10. SW4 calculates that going through SW3 is cheaper than going directly to the root, giving it a total root cost of 40. SW5 finds its best path by going through SW4, resulting in a total root cost of 50. All of these preferred entry points become Root Ports.
Next, we look at the remaining open links to see which ports must be blocked to prevent loops.
On any connection between two switches, the switch that is further away from the root bridge loses the battle and has to block its port, turning it into an Alternate Port.
When comparing the cross-link between SW1 and SW4, SW1 is the root bridge itself, so SW4 loses this matchup and blocks its GE1/0/3 port. Looking at the link between SW3 and SW5, SW3 is much closer to the root bridge with a cost of 10 compared to SW5's cost of 50, which forces SW5 to block its GE1/0/1 port. On the remaining links, SW2 forces SW4 to block its GE1/0/2 port, and SW3 forces SW2 to block its GE1/0/3 port.
Matching these blocked paths to the given choices leaves us with GE1/0/3 of SW4 and GE1/0/1 of SW5 as the alternate ports.
問題 #24
Drag and Drop Question
On the campus network shown in the figure below, the core switch Core1 functions as a Layer 3 gateway and as a DHCP server to dynamically assign IP addresses to AP1, PC1, PC2, and PC3.
The network below Core1 is a Layer 2 network. WAC1 and R1 are connected to Core1 at Layer
3. AP1 goes online through VLAN 100. VLAN 101 and VLAN 102 are respectively used for the wireless and wired services. Additionally, the tunnel forwarding mode is used for wireless traffic forwarding. Match device interfaces with their respective allowed VLANs. (Note: No additional VLANs are allowed on device interfaces, and interconnection VLANs are not considered.)
答案：
解題說明：
Explanation:
VLAN 100 -> GE1/0/3 of ACC1
VLAN 101-> GE1/0/2 of Core1
VLAN 102 -> GE1/0/1 of ACC2
VLAN 100 and VLAN 101 -> GE1/0/1 of ACC1
VLAN 100 and VLAN 101 -> GE1/0/3 of Core1
VLAN 102 -> GE1/0/4 of Core1
GE1/0/3 of ACC1 -> VLAN 100: This interface directly connects ACC1 to AP1. Since AP1 goes online through management VLAN 100 and wireless user traffic uses tunnel forwarding mode (where user data is encapsulated inside a CAPWAP tunnel directly to WAC1), the physical link to the AP only needs to pass the untagged management traffic of VLAN 100.
GE1/0/2 of Corel -> VLAN 101: This port links Corel to WAC1. In tunnel forwarding mode, all wireless user data (VLAN 101) is encapsulated inside CAPWAP data tunnels by the AP and sent to the WAC. The WAC then decapsulates this traffic and forwards it into the core switch.
Therefore, the interface facing WAC1 must allow service VLAN 101 to route the decapsulated wireless traffic.
GE1/0/1 of ACC2 -> VLAN 102: This interface forms the uplink from the access switch ACC2 to Corel. Because ACC2 only services PC3 (wired service VLAN 102), its uplink only requires access to VLAN 102.
GE1/0/1 of ACC1 -> VLAN 100 and VLAN 102: This is the uplink interface from ACC1 to Corel.
ACC1 hosts AP1 (which requires management VLAN 100) and PC2 (which belongs to wired service VLAN 102). Therefore, this trunk link must allow both VLAN 100 and VLAN 102.
GE1/0/3 of Corel -> VLAN 100 and VLAN 102: This interface connects Corel down to ACC1. To match the configuration of ACCTs uplink, it must allow both the AP management traffic (VLAN
100) and the local wired user traffic (VLAN 102).
GE1/0/4 of Corel -> VLAN 102: This port connects Corel to ACC2. Because ACC2 exclusively handles the wired clients residing in service VLAN 102, this downlink interface only needs to permit VLAN 102.
問題 #25
You can enter a question mark (?) in the CLI of a Huawei switch to obtain online help. Which of the following statements is true about the meaning of < cr > in the output of the command sysname SW1?
[HUAWEI] sysname SW1?
< cr >
答案：C
解題說明：
In the Huawei command-line interface, the question mark ? provides real-time command help based on the current input. When the output shows < cr > , it means that the command can end at that point by pressing Enter . In other words, there is no additional keyword or parameter required in that position. Therefore, option B is correct.
In the example sysname SW1?, the device interprets SW1 as a complete and valid hostname parameter for the sysname command. Since nothing else is required after the hostname, the CLI displays < cr > to indicate command completion is allowed. This behavior is common in Huawei devices and is important for daily operation and troubleshooting because it helps engineers understand whether a command is complete, whether more arguments are needed, or whether optional parameters are available. Options about incorrect keywords or incomplete commands do not apply here, because the entered command syntax is already valid.
Understanding < cr > is a basic but important CLI skill in HCIA-Datacom operations.
問題 #26
The following ACL is configured on R1:
[R1] acl 2001
[R1-acl4-bask-2001] rule permit source 192.168.1.3 0
[R1-acl4-bask-2001] rule deny source 192.168.1.3 0
[R1-acl4-bask-2001] quit
If R1 matches packets against ACL rules in ascending order of rule IDs, hosts at 192.168.1.3/24 match the permit rule of the ACL.
答案：A
解題說明：
ACL rules are matched strictly in ascending order of rule IDs. However, in this ACL, rule 10 (deny) comes before rule 5 (permit) because rule IDs are not necessarily evaluated by statement order unless explicitly defined otherwise in behavior. Since rule IDs define processing order, the deny rule for 192.168.1.3 is evaluated first and matches the traffic, blocking it before it can reach the permit rule. Therefore, hosts at 192.168.1.3/24 do not match the permit rule, making the statement false.
問題 #27
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