Free Huawei H12-811_V2.0 Practice Exam with Questions & Answers | Set: 2

This statement is true . From the routing table, the entry 10.0.12.0/24 Direct ... NextHop 10.0.12.1 Interface Vlanif2 indicates that the network 10.0.12.0/24 is directly connected through Vlanif2 , and the local interface address associated with that directly connected network is 10.0.12.1 .

This conclusion is further supported by the host route 10.0.12.1/32 Direct ... 127.0.0.1 Vlanif2, which represents the local IP address of the interface itself. On Huawei devices, when an IP address is configured on an interface, the routing table commonly generates a direct route to the connected network, a host route to the interface IP itself, and sometimes a host route to the broadcast address where applicable in IPv4. Therefore, from the displayed entries, it can indeed be inferred that VLANIF 2 has the IP address 10.0.12.1/24 . HCIA-Datacom uses these routing-table characteristics to help learners identify connected interfaces, local addresses, and route origins during troubleshooting and route analysis on routers and Layer 3 switches.

ARP resolves an IPv4 address to a Layer 2 MAC address only within the local broadcast domain. When Host A determines, from its IP address and subnet mask, that Host B is on a different subnet, Host A does not broadcast an ARP request for Host B ' s MAC address. Instead, it forwards the packet to its default gateway. If the gateway ' s MAC address is not already cached, Host A broadcasts an ARP request for the gateway interface ' s IPv4 address. The gateway replies with its own MAC address, and Host A uses that MAC address as the Ethernet destination while retaining Host B ' s IP address as the IP destination. The router then forwards the packet toward Host B and may perform ARP on the destination subnet to learn Host B ' s MAC address. Therefore, the statement incorrectly describes cross-subnet forwarding as direct ARP resolution between the two hosts. The correct answer is FALSE, option B.

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.

After STP convergence, only ports in the forwarding state participate in active traffic forwarding, while redundant ports may be placed into the blocking or discarding state to eliminate loops. According to the topology and STP role election shown in the question, the valid forwarding path from SW1 to SW4 is SW1 → SW3 → SW4, so option B is correct.

This means that the direct alternative path or the path through SW2 is not the active spanning-tree forwarding path after election and state transition. STP selects paths based on the root bridge, path cost, bridge ID, and port ID. Once the root bridge and port roles are determined, some links remain active and others are blocked to ensure a loop-free Layer 2 topology. HCIA-Datacom emphasizes that the resulting forwarding topology is a tree, not a mesh, even if the physical topology contains redundant links. Understanding the actual forwarding path after STP convergence is important for troubleshooting connectivity, predicting traffic behavior, and verifying whether bridge priority and path-cost settings have produced the intended design outcome in campus switching networks.

An ARP Request is carried in an Ethernet broadcast frame whose destination MAC address is FF-FF-FF-FF-FF-FF. When SW1 receives the ARP Request from PC2, it does not look up a single destination MAC entry and send the frame only toward PC3. Instead, the switch floods the broadcast frame through all other eligible ports in the same VLAN, excluding the ingress port. The 300-second MAC aging time reinforces why the earlier PC1 entry is not relevant after 30 minutes: a dynamic entry that is not refreshed will age out long before PC2 is connected. PC4 ' s continued communication with PC3 may refresh MAC entries associated with that traffic, but it does not transform PC2 ' s ARP Request into a known unicast frame. ARP relies on broadcast precisely because the sender does not yet know the target ' s Layer 2 address. Therefore, the claim that SW1 forwards the request only through GE1/0/3 is incorrect. The verified answer is FALSE, option B.

On Huawei VRP, the startup saved-configuration command specifies the configuration file that the device will load at the next restart. This is distinct from selecting the system software image. The startup system-software command identifies the software package used for the next boot, whereas startup saved-configuration identifies the saved configuration that should be restored after the software starts. The reset saved-configuration command clears the saved startup configuration rather than selecting one, and reset factory-configuration is used to restore factory-related settings on platforms that support it. In normal operations, an administrator first saves or uploads a valid configuration file to local storage and then uses startup saved-configuration to nominate that file for the next startup. The selected file must be in a format supported by the device and accessible in its file system. Therefore, when the requirement is specifically to define which configuration file is used after the next reboot, option B is the correct Huawei VRP command.

To check OSPF-learned routes in the global IP routing table , the correct command is display ip routing-table protocol ospf , so option A is correct. This command filters the routing table and shows only the routes whose source protocol is OSPF. It is especially useful when verifying whether OSPF-learned routes have been successfully installed into the forwarding table after neighbor establishment and LSDB calculation.

Option B , display ospf peer, is used to check OSPF neighbor information and adjacency states, not the routing table. Option C , display ospf interface, shows OSPF-related parameters on interfaces such as timers, network type, and cost. Option D , display ospf routing, displays OSPF route information maintained by the OSPF process itself, but the question specifically asks about routes in the global routing table , which is the RIB used for actual forwarding decisions. HCIA-Datacom distinguishes between protocol-specific route information and the final routing table seen by the device. Understanding this distinction helps engineers verify whether a protocol has only learned topology information or has actually produced usable forwarding entries.

VTY interfaces provide remote terminal sessions to the device. The command protocol inbound all allows the interactive remote-login protocols supported by that VTY implementation, notably Telnet and SSH/STelnet. FTP is not a VTY terminal-login protocol. FTP is a file-transfer service that uses its own server/client process, TCP sessions, authentication, and file system permissions; enabling FTP service does not make an FTP user consume a VTY terminal line in the same manner as a Telnet or SSH CLI session. Therefore, even though the word all broadens the VTY ' s permitted terminal access protocols, it does not mean that FTP users log in through those five VTY interfaces. Huawei troubleshooting documentation specifically treats protocol inbound all as satisfying Telnet and SSH access requirements. The statement incorrectly groups FTP with the VTY login protocols and claims that all three types of users can use the five VTY interfaces. That conclusion is false. The verified answer is B.

The correct answer is 802.11ac , so option C is correct. In standard WLAN evolution knowledge used in HCIA-Datacom, 802.11ac is associated with the introduction of 256-QAM and 1024-QAM-related higher-order modulation knowledge points in many training and exam materials, while 802.11ax and 802.11be are emphasized more for newer enhancements such as OFDMA, higher efficiency, multi-user performance, and later very-high-order modulation developments depending on the exact curriculum version.

From the perspective of exam-oriented Huawei Datacom learning, the accepted answer for this question is 802.11ac . Option A , 802.11n, is earlier-generation Wi-Fi and does not use 1024-QAM as the defining answer here. Option B , 802.11ax, is Wi-Fi 6 and introduces major efficiency improvements, but this question’s expected answer set identifies 802.11ac . Option D , 802.11be, corresponds to Wi-Fi 7 and is associated with even more advanced capabilities in newer standards. HCIA-Datacom WLAN questions often test the matching of a standard with one representative technical characteristic from the training materials rather than the entire modulation evolution history.

The address 224.0.0.1/24 cannot be configured as a normal host IP address by default because it belongs to the Class D multicast address range . IPv4 multicast addresses range from 224.0.0.0 to 239.255.255.255 and are reserved for multicast group communication rather than assignment to host interfaces as ordinary unicast addresses. Therefore, option D is correct.

The other three options are all private unicast address ranges and can be configured on hosts in private networks. 10.0.0.1/8 belongs to the 10.0.0.0/8 private range, 172.16.1.1/16 belongs to the 172.16.0.0/12 private range, and 192.168.1.1/24 belongs to the 192.168.0.0/16 private range. These are commonly used in enterprise and campus networks. HCIA-Datacom teaches that host IP address planning must distinguish between unicast, multicast, loopback, broadcast, and other special-purpose ranges. Multicast addresses identify multicast groups and are processed differently by hosts and network devices, so they are not valid default host addresses for ordinary end-to-end IP communication.