H12-811_V1.0 Huawei HCIA-Datacom V1.0 Exam Free Practice Exam Questions (2026 Updated)

Detailed Explanation:Using DHCP provides several advantages:

It helps prevent IP address conflicts because the DHCP server dynamically assigns IP addresses, ensuring each device gets a unique one.

IP addresses can be reused by setting lease times, allowing the DHCP server to recycle addresses from devices that no longer need them.

Centralized configuration management is also possible. If network configuration details such as the DNS server change, the administrator can update these settings on the DHCP server, and all DHCP clients will automatically receive the new information​​.

IPv6 Anycast Address Characteristics:

Option A: True. Packets are delivered to the nearest interface based on routing distance.

Option B: False. Anycast addresses are not designed for load balancing.

Option C: True. Anycast addresses share the same address space as unicast.

Option D: True. Anycast provides redundancy by allowing multiple endpoints to share the same address​​.

Detailed Explanation:

The subnet 200.200.200.200/30 allows two usable IP addresses, 200.200.200.201 and 200.200.200.202. These two addresses can communicate with each other directly, without the need for routing .

Comprehensive and Detailed In-Depth Explanation:

In Huawei switches:

" port hybrid tagged vlan X " → VLAN X traffic remains tagged when forwarded.

" port hybrid untagged vlan Y " → VLAN Y traffic is sent without a tag (untagged).

Correct Answer:

VLAN 4 and 6 will be untagged before leaving the port.

Incorrect Options:

VLANs 1, 5 are not mentioned in the configuration, so they are not untagged.

Private vs Public IPs:

192.168.1.2 belongs to the private IP range (192.168.0.0/16).

Private IP addresses cannot be routed on the Internet and must be translated.

Network Address Translation (NAT):

NAT converts private IP addresses to a public IP so that the device can access the Internet.

Conclusion:

NAT is required to access the Internet from a private IP, making the statement TRUE.

Comprehensive and Detailed Explanation:

STP (Spanning Tree Protocol) Port States:

Blocking → Listens for BPDUs but does NOT forward traffic.

Listening → Starts sending BPDUs but still does NOT forward traffic.

Learning → Learns MAC addresses but still does NOT forward traffic.

Forwarding → Learns MAC addresses and forwards traffic.

Explanation of options:✅ A is correct → Forwarding ports can send BPDUs.✅ B is correct → Forwarding ports can receive BPDUs.❌ C is incorrect → Forwarding ports do learn MAC addresses.✅ D is correct → Forwarding ports can forward frames.

✅ Reference: HCIA-Datacom Switching Guide – STP Port States

Detailed Explanation:RSTP (Rapid Spanning Tree Protocol) combines the Blocking, Listening, and Disabled states into Discarding, reducing the number of states to Discarding, Learning, and Forwarding. RSTP does not use a separate Listening state, as in standard STP. (Reference: HCIA-Datacom Training Material, RSTP Port States)

Router A would have three TCP connections in this scenario:

One for the Telnet session from host A to router A.

One for the FTP control connection to router B.

One for the FTP data connection to transfer the configuration file. These TCP connections facilitate the remote login and file transfer across the network​.

A Layer 2 ACL primarily matches Layer 2 information, such as source and destination MAC addresses. However, it does not match Layer 3 information like IP addresses, as Layer 2 ACLs are designed to control traffic based on MAC addresses rather than IP-based criteria. Layer 3 ACLs would be used to match IP addresses​.

In DHCP (Dynamic Host Configuration Protocol):

The client starts renewal at 50% (0.5) of the lease time to extend its lease with the DHCP server.

If unsuccessful, it tries again at 87.5% (0.875) before the lease expires.

Option A (Incorrect - 0.875): This is the second attempt if the first renewal fails.

Option B (Correct - 0.5): The first renewal attempt occurs when the lease reaches 50% of its duration.

Option C (Incorrect - 0.25): No renewal attempt happens at 25%.

Option D (Incorrect - 1): At 100% lease expiration, the IP is released and a new request is needed.

Thus, the correct answer is B.

Detailed Explanation:

Dynamic routing protocols, such as OSPF and RIP, automatically discover and generate routes, adjusting when network topology changes occur. This helps in reducing the manual configuration required by static routes and ensures that the network adapts efficiently to changes such as link failures or the addition of new routes.

Statement A (Correct): DR and BDR must form an adjacency relationship to maintain routing information exchange.

Statement B (Incorrect): The router with the higher priority is elected as DR, not the lower one.

Statement C (Incorrect): DR is elected by routers within a broadcast/multi-access network, not necessarily all routers in the same network segment.

Statement D (Correct): If two routers have the same priority, the one with the higher Router ID becomes the DR.

If host A already has host B’s MAC address in its ARP cache, it can send packets directly to host B without needing to perform an ARP request. This cached information allows immediate packet delivery, assuming no network changes have occurred that would invalidate the ARP entry​.

LACP Active Interface Election Overview:In LACP mode, active interfaces are elected based on interface priorities. If the interface priorities are identical, the system compares the interface numbers, and the one with the smaller number is preferred.

Analysis of Options:

Option A: Incorrect because interface priorities alone are insufficient when multiple interfaces share the same priority.

Option B: Device priorities are not used in this scenario for selecting active interfaces.

Option C: Correct. This process aligns with the behavior described for LACP, where interface priorities are compared first, and interface numbers are used as a tie-breaker.

Option D: Incorrect because interface numbers are only used as a secondary criterion.

Correct Answer:C. Interface priorities are compared first. If priorities of interfaces on the Actor are the same, interfaces with smaller interface numbers are elected as active interfaces​​.

The BSSID (Basic Service Set Identifier) serves as the MAC address identifier for each Virtual Access Point (VAP) on an AP. Each BSSID uniquely identifies an SSID on a specific radio of an AP, allowing clients to associate with the correct access point in a multi-AP environment​.