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

ACL 2001 is a basic IPv4 ACL because Huawei numbered basic ACLs use the range 2000 to 2999. A basic ACL can match relatively simple conditions such as source IP address and an effective time range, but it does not support matching the IP protocol, destination IP address, or TCP/UDP source and destination port numbers. The attempted rule includes tcp, destination-port eq telnet, and a destination network, all of which require an advanced ACL. Huawei advanced ACLs use the 3000 to 3999 range and can match protocol type, source and destination addresses, and Layer 4 port values. Therefore, even after correcting the obvious command typo from ad 2001 to acl 2001, the rule syntax is still incompatible with a basic ACL 2001 and cannot be successfully configured in that ACL view. To implement the intended policy, the administrator should create an advanced ACL and express the TCP Telnet and destination conditions there. Consequently, the statement that the rule cannot be configured successfully is TRUE, option A.

STP elects the root bridge using the lowest Bridge ID, which consists of bridge priority and MAC address.

All switches have the same priority, but SW1 has the lowest bridge MAC address. Therefore, SW1 becomes the root bridge, making B true.

All active ports on the root bridge operate as designated ports, so C is also true.

SW3 selects its direct connection to SW1 as its root port because this provides the lowest root path cost. Its connection toward SW2 becomes an alternate port, while its connection toward SW4 is designated. Therefore, SW3 does not have two alternate ports, making A false.

The forwarding path from SW2 to SW4 follows SW2 → SW1 → SW3 → SW4, not the path stated in D.

Therefore, A and D are false.

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When two OSPF routers reach the Full state, it means that adjacency establishment has been successfully completed and the routers have synchronized the necessary link-state information for that area. For this to happen, the two routers must have different router IDs, so option A is correct. They must also belong to the same OSPF area on the interfaces used to form the adjacency, making option B correct. Once adjacency reaches Full state, the routers have synchronized their link-state databases for that area, so option D is also correct.

Option C is incorrect because the OSPF process ID is only locally significant on a device. Two neighboring routers do not need to use the same process ID to establish adjacency. HCIA-Datacom teaches that OSPF neighbor formation depends on matching parameters such as area ID, network type, hello/dead timers, authentication settings, and subnet consistency, but not on the locally configured process number. This question is important because many learners mistakenly believe the process ID must match between devices, while in fact OSPF uses protocol parameters exchanged in packets rather than local process labels to form neighbor relationships.

Modern cloud data centers require horizontal scalability, high east-west bandwidth, virtualization support, and flexible tenant network extension. A spine-leaf physical topology provides predictable low-hop connectivity between leaf switches by connecting each leaf to the spine layer. VXLAN provides an overlay that can create large numbers of logical Layer 2 segments over the Layer 3 underlay and is well suited to virtualized and multi-tenant cloud environments. The combination of Spine-Leaf and VXLAN is therefore a standard architecture for cloud-based general-purpose data center networks. M-LAG with Eth-Trunk can provide device and link redundancy but does not by itself provide the scalable overlay architecture expected for a cloud fabric. PFC and ECN are lossless-network and congestion-management technologies rather than a complete general-purpose data center architecture. STP with VRRP represents more traditional Layer 2 redundancy and gateway protection and does not offer the same cloud-fabric scalability. Consequently, the architecture described in the question is Spine-Leaf + VXLAN, making option B correct.

This statement is false because the receiver is one of the fundamental elements of communication. In basic communication theory, a complete communication process requires at least four essential elements: the sender, the information or message content, the transmission medium or channel, and the receiver. If the receiver is missing, communication cannot be completed because there is no endpoint to accept, interpret, or respond to the transmitted information.

In datacom networks, this concept maps directly to real networking scenarios. A source host generates data, the data is carried over some medium such as copper, fiber, or wireless, and a destination host receives the data. Network devices such as switches and routers assist the forwarding process, but the fundamental communication model still includes both communicating endpoints. HCIA-Datacom emphasizes the complete sender-to-receiver process when introducing network communication basics, protocol encapsulation, and forwarding. Therefore, excluding the receiver from the communication elements is conceptually incorrect. The correct understanding is that sender, receiver, information content, and channel together form the essential basis of communication.

OSPF divides a large routing domain into areas so that link-state information can be contained and the processing burden on individual routers can be reduced. Within a given OSPF area, routers exchange LSAs and synchronize the area ' s link-state database. After the network has converged and the participating routers have full adjacency where required, routers in the same area maintain a consistent view of that area ' s topology. Each router then runs the SPF algorithm independently against that common LSDB, using itself as the root, so the calculated shortest-path tree can differ in perspective even though the underlying area topology database is the same. Area boundaries also limit which detailed LSAs need to be maintained by routers outside the area, which is one reason hierarchical OSPF scales better than a single very large area. The statement should be understood under normal, converged OSPF operation; simply sharing an area number without connectivity would not create synchronization. In the intended HCIA Datacom context, R1 and R2 participating in the same area maintain the same area LSDB. Therefore the answer is TRUE, option A.

On Huawei switches, a physical Ethernet interface usually works as a Layer 2 switch port by default. A Layer 2 interface cannot be assigned an IP address directly. If an administrator wants to configure an IP address on such an interface, the interface must first be converted into a Layer 3 interface. The command used for this is undo portswitch, so option B is correct.

After this command is executed, the interface no longer behaves as a Layer 2 switching port and can then support Layer 3 features such as direct IP address configuration. Options A, C, and D are all Layer 2 port-type commands used to configure the interface as a trunk, access, or hybrid port. These commands do not solve the problem because they keep the interface operating at Layer 2. HCIA-Datacom emphasizes the difference between Layer 2 switching interfaces and Layer 3 routed interfaces on switches. Understanding when to use undo portswitch is important in campus network deployment, especially when configuring routed uplinks, management interfaces, or inter-device Layer 3 links on switches.

Comprehensive and Detailed 150 to 200 words of Explanation From Datacom knowledge:

The false statement is B. From the AAA configuration output, the value of Remote-admin-user block time is clearly shown as 5 Min(s), which means the account lockout duration is 5 minutes, not 30 minutes.

Option A is true because Remote-admin-user block retry-time : 3 indicates that after 3 consecutive authentication failures, the account will be blocked. Option C is also true because the displayed Domain Name Delimiter is @, which is the separator used in usernames such as user@huawei.com. Option D is true as well because the output shows Local-user : total: 512 used: 2, meaning that the device supports a maximum of 512 local users, and currently 2 local users have been created.

This question checks the ability to correctly read AAA configuration output on Huawei devices. In HCIA-Datacom knowledge, it is important to distinguish between retry interval, retry count, and block time, because these values represent different security control parameters and are often confused during troubleshooting or configuration review.

Both switch ports shown in the exhibit are configured as trunk ports and VLAN 10 is permitted, but the configuration does not change the trunk PVID from its default value of VLAN 1. On Huawei switches, untagged frames received on a trunk interface are associated with the interface PVID. A normal PC sends untagged Ethernet frames, so traffic from both PC1 and PC2 is classified into VLAN 1. VLAN 1 is permitted on a trunk by default unless it is explicitly removed with an undo port trunk allow-pass vlan 1 command. As a result, the two PCs remain in the same Layer 2 broadcast domain through VLAN 1 and can exchange ARP and ICMP traffic. Merely adding VLAN 10 to the allowed VLAN list does not force untagged host traffic into VLAN 10. Therefore, the statement that pinging 192.168.1.2 from PC1 must fail is incorrect. The correct response is FALSE, option B.