Free Practice Questions for Huawei H12-811_V2.0 Exam

The correct answer is C. In the command output, the AP state is shown as ver-mismatch. This state directly indicates a version mismatch between the AP and the WAC. In Huawei WLAN deployment, a Fit AP must use a software version that is compatible with the WAC version. If the versions do not match, the AP may be discovered by the WAC and appear in the AP list, but it cannot successfully complete the online process.

Option A is incorrect because blacklist-related failures are displayed with blacklist-related status information, not ver-mismatch. Option B is also incorrect because authentication failures normally generate authentication-related fault indications. Option D is incorrect because configuration initialization failure would not be identified by the specific ver-mismatch state.

HCIA-Datacom troubleshooting knowledge emphasizes reading AP online states carefully. Common causes of AP online failure include IP address acquisition failure, CAPWAP tunnel establishment failure, insufficient licenses, authentication problems, and version mismatch. When the state explicitly shows ver-mismatch, the troubleshooting direction is clear: check AP and WAC software compatibility and upgrade or align the software version as needed.

The source key marks this statement TRUE, but the topology makes that answer technically incorrect. R1 is shown with interface address 10.0.12.1/24, which automatically installs a directly connected route to 10.0.12.0/24. On Huawei VRP, a direct route has preference 0, whereas a static route has preference 60 unless another value is configured. The two commands do configure two static routes with the same preference, and equal-preference static routes can support load balancing when they are the best routes to a destination. Here, however, both static routes are for the same prefix that R1 already owns as a connected network. The direct route has a higher priority because its preference value is smaller, so it is selected in the active IP routing table instead of the two preference-60 static routes. Therefore the assertion that R1 has two active equal-cost routes to 10.0.12.0/24 is FALSE as the question and exhibit are written. The verified answer is B, and the original source key A should be corrected.

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.

This question tests the difference between Layer 3 addressing and Layer 2 encapsulation during routing. The IP packet originated by PC1 keeps PC1 ' s IP address as its source IP and PC2 ' s IP address as its destination IP as it traverses the routers. Ethernet MAC addresses, however, are rewritten at every routed hop. When R1 forwards the packet across the link toward R2, R1 builds a new Ethernet frame on its outgoing interface. According to the exhibit, R1 ' s outgoing interface on the R1-R2 link uses MAC_C, so MAC_C is the source MAC address. The next-hop device on that link is R2, whose receiving interface uses MAC_D, so MAC_D is the destination MAC address. MAC_A belongs to PC1 and was relevant only on the first local Ethernet segment. MAC_F belongs to PC2 and is used on the final Ethernet segment from R2 to PC2, not on the R1-R2 link. Therefore the correct statements are B and D. The uploaded key B, C is incorrect.

Huawei ' s HCIA-Datacom V2.0 Training Material explicitly explains that STelnet is an application operating over SSH 2.0, not an entirely new protocol. Therefore, statement B is false according to the training material.

STelnet provides encrypted remote terminal access through SSH authentication, encryption, and integrity protection.

Statement C correctly describes the client/server architecture. The administrator ' s terminal operates as the client, while the managed device functions as the STelnet server.

Statement A reflects the requirement for sufficient command privileges when modifying device configurations.

Statement D requires qualification. Huawei supports changing the SSH server listening port, and port 1026 is a possible non-default value. However, describing the configurable value as any port is too broad because allowable values are subject to platform restrictions.

The explicit source-supported false statement is B.

A directly connected route is automatically generated when a router interface has a valid IP address and the interface is operational.

In this topology, R2 connects directly to two networks: 10.0.0.0/24 through GE0/0/1 and 20.1.1.0/24 through S1/0/0.

Therefore, R2 already has the necessary routing information to forward packets between these two directly connected networks. Additional static routes are not required on R2.

However, R1 initially knows only its directly connected network, so it requires a static route toward 20.1.1.0/24 using R2 as its next hop.

Similarly, R3 requires a static route toward 10.0.0.0/24 through R2.

These routes provide bidirectional connectivity between interfaces on R1 and R3.

Therefore, the router that does not require additional static routes is R2.

The authentication-mode radius local configuration defines an authentication sequence in which RADIUS is attempted first and local authentication is used as a fallback under the conditions defined by Huawei AAA processing. A critical distinction exists between a RADIUS service being unavailable and a RADIUS server explicitly rejecting the credentials. If the RADIUS server is unreachable, times out, or otherwise cannot perform the authentication service, local authentication may be used as the backup method. However, when the device successfully contacts the RADIUS server and receives an explicit authentication failure or Access-Reject response, that is a definitive authentication result rather than a server-unavailable condition. The device does not simply bypass the rejection and retry the same user against the local database, because doing so would undermine centralized authentication policy. The question explicitly states that R1 is properly connected to the RADIUS server and that the server sends an authentication failure message. Therefore, the claimed fallback to local authentication does not occur in this situation. The statement is FALSE and option B is correct.

The exhibit assigns SW1 GE1/0/1 to VLAN 10 and GE1/0/2 to VLAN 20, while the trunk between SW1 and SW2 carries the required VLANs. When PC1 is connected to GE1/0/1, its untagged frames are classified into VLAN 10. PC2 is also in VLAN 10, so PC1 can communicate with PC2 at Layer 2, whereas PC3 is in VLAN 20 and is separated by the VLAN boundary. SW1 learns PC1 ' s source MAC address together with VLAN 10 and ingress interface GE1/0/1. When PC1 is moved to GE1/0/2, its untagged frames are now placed in VLAN 20. After MAC relearning occurs, PC1 can communicate with PC3, which is also in VLAN 20, but not directly with PC2 in VLAN 10 unless Layer 3 inter-VLAN routing is provided. Consequently, statement A is false because PC1 is not isolated from both hosts after the move; it can communicate with PC3.

This statement is true. ARP is a Layer 2 broadcast-based protocol used to resolve an IPv4 address into a MAC address within the same broadcast domain. If two PCs are connected to the same switch but cannot learn each other’s ARP entries, one likely reason is an incorrect VLAN configuration.

For example, if PC1 and PC2 are placed in different VLANs, or if one interface is configured with the wrong access VLAN, ARP broadcast frames from one PC will not reach the other PC because VLANs separate Layer 2 broadcast domains. As a result, the ARP request will not be received by the peer, and the MAC address cannot be resolved. Other causes may also exist, such as incorrect IP addressing, port isolation, or security policies, but VLAN misconfiguration is a very common and valid cause in campus switching scenarios. HCIA-Datacom teaches that ARP communication depends on correct Layer 2 domain membership, and VLAN planning or interface configuration errors often directly affect host-to-host communication even when both hosts are physically connected to the same switch.

STP and link aggregation are not mutually exclusive technologies. They solve different problems and can coexist on the same switch. Link aggregation combines multiple physical Ethernet links into a logical Eth-Trunk, increasing available bandwidth and providing member-link redundancy. STP or a related spanning-tree protocol prevents Layer 2 loops by calculating a loop-free active topology and can treat an Eth-Trunk as a logical interface. In a well-designed campus network, several physical links between two switches may first be aggregated into one Eth-Trunk, while STP operates over that logical link together with other Layer 2 paths. Conversely, if separate redundant links are not aggregated, STP may block one or more paths to prevent a loop. Choosing link aggregation can use parallel member links more efficiently than allowing STP to block individual links, but enabling one function does not prohibit use of the other elsewhere on the device. Therefore, the assertion that only STP or link aggregation can be configured on a device at one time is incorrect. The verified answer is FALSE, option B.