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

The default Link Aggregation Control Protocol (LACP) system priority on Huawei switches is 32768. This priority helps determine which device takes the active role in link aggregation when multiple switches are involved. A lower value indicates a higher priority for managing the aggregated link​.

Detailed Explanation:Static MAC address entries are manually configured and stored in the switch ' s configuration file, making them persistent across reboots. These entries remain in the MAC address table after a restart, unlike dynamic entries, which are lost. (Reference: HCIA-Datacom Training Material, MAC Address Table Types)

Comprehensive and Detailed Explanation:

In PPP (Point-to-Point Protocol) connections, a static route can be configured using:

Next-hop IP address

Outbound interface

Since PPP links are point-to-point, the router can directly forward packets without needing an explicit next-hop address.

Example configurations:

ip route-static 10.1.1.0 24 Serial0/0/0

ip route-static 10.1.1.0 24 192.168.1.2

✅ Reference: HCIA-Datacom Routing Guide – Static Route Configuration on PPP

The PVID (Port VLAN ID) specifies the default VLAN for untagged frames.

The command port trunk pvid vlan 10 means that VLAN 10 is the default VLAN.

When untagged frames arrive, they are assigned to VLAN 10.

When the switch forwards frames from VLAN 10, it removes the VLAN tag.

VLANs 20, 30, and 40 remain tagged.

Thus, the correct answer is D (VLAN 10).

Detailed Explanation:OSPF (Open Shortest Path First) has several key advantages:

It can load balance traffic among equal-cost routes.

OSPF supports hierarchical area structures, allowing for network scalability and reduced routing table sizes.

OSPF supports strong security measures through packet authentication (MD5 or plain text).

It supports Classless Inter-Domain Routing (CIDR), allowing for more efficient IP address allocation and route aggregation.

Restoring factory defaults on an AR2200 router requires both clearing the current configuration and resetting saved configurations. These steps ensure that any custom settings are removed, reverting the router to its original state. Simply restarting or specifying a startup file without clearing configurations would not remove custom settings​.

Comprehensive Explanation: The user-interface maximum-vty command is used on Huawei devices to configure the maximum number of simultaneous VTY (Virtual Terminal Line) users who can log in via Telnet. By limiting the number of VTY sessions, the administrator can control how many users are able to access the device at the same time, preventing excessive connections that may overwhelm the device or reduce security.

The wildcard mask 0.0.254.255 means:

The first and third octets are checked exactly.

The second and fourth octets can vary.

This results in a match for IPs in the range 10.0.2.0 - 10.0.2.255.

Only option D (10.0.2.1) falls within this range.

Thus, the correct answer is D (10.0.2.1).

To ensure communication between Host A and Host B, we need to analyze the network topology, VLAN configuration, and the role of SWC as an intermediate switch. Let’s break it down step by step, based on VLAN and trunking principles as outlined in HCIA Datacom documentation:

Understanding the Current Network Configuration:

Host A and Host B: Both are connected to SWA and SWB, respectively, via access ports assigned to VLAN 2. Access ports carry untagged traffic for a single VLAN (in this case, VLAN 2), so Host A and Host B are part of VLAN 2.

SWA and SWB Trunk Interfaces: G0/0/1 on SWA and G0/0/2 on SWB are configured as trunk interfaces allowing all VLANs. Trunk ports carry tagged traffic for multiple VLANs (including VLAN 2 in this case) and are used to interconnect switches, enabling VLAN traffic to pass between them. Since these trunk ports allow all VLANs, VLAN 2 traffic can traverse between SWA and SWB.

SWC: SWC is the intermediate switch connecting SWA and SWB via its G0/0/1 (connected to SWA’s G0/0/1) and G0/0/2 (connected to SWB’s G0/0/2). However, the diagram and question do not specify SWC’s current VLAN or port configurations. By default, if no VLAN or trunk configuration exists on SWC, VLAN 2 traffic cannot pass through SWC, preventing communication between Host A and Host B.

Requirements for Communication Between Host A and Host B:

For Host A and Host B (both in VLAN 2) to communicate across the network, VLAN 2 traffic must be able to traverse SWC. This requires:

VLAN 2 to be created on SWC so that the switch recognizes and processes traffic for that VLAN.

The interfaces on SWC (G0/0/1 and G0/0/2) connecting to SWA and SWB must be configured as trunk ports to carry tagged VLAN 2 traffic, matching the trunk configuration on SWA’s G0/0/1 and SWB’s G0/0/2.

Trunk ports are necessary because they can carry traffic for multiple VLANs (tagged) and are typically used between switches to maintain VLAN consistency across the network.

Evaluating Each Option:

A. Create VLAN 2 on SWC.

Creating VLAN 2 on SWC is necessary, but it alone is insufficient. Without configuring the ports (G0/0/1 and G0/0/2) as trunk interfaces allowing VLAN 2, the VLAN traffic cannot pass through SWC. This option is incomplete and incorrect.

B. Configure G0/0/1 on SWC as a trunk interface that allows packets from VLAN 2 to pass through.

Configuring G0/0/1 as a trunk interface allowing VLAN 2 is part of the solution, but it only addresses the connection to SWA. G0/0/2 (connected to SWB) also needs to be configured as a trunk interface allowing VLAN 2 for bidirectional communication between Host A and Host B. This option is incomplete and incorrect.

C. Create VLAN 2 on SWC, and configure G0/0/1 and G0/0/2 as trunk interfaces that allow packets from VLAN 2 to pass through.

This option addresses all requirements:

Creating VLAN 2 on SWC ensures the switch recognizes VLAN 2 traffic.

Configuring both G0/0/1 and G0/0/2 as trunk interfaces allowing VLAN 2 ensures that tagged VLAN 2 traffic can pass between SWA and SWB through SWC, enabling communication between Host A and Host B.

This is the complete and correct solution, aligning with VLAN and trunking principles in HCIA Datacom.

D. On SWC, configure G0/0/1 as a trunk interface that allows packets from VLAN 2 to pass through, configure G0/0/2 as an access interface, and set the PVID to 2.

Configuring G0/0/1 as a trunk interface allowing VLAN 2 is correct for the connection to SWA. However, configuring G0/0/2 as an access interface with PVID 2 (Port VLAN ID) is incorrect for this scenario:

Access ports carry untagged traffic for a single VLAN and are typically used for end devices, not for interconnecting switches. Since SWB’s G0/0/2 is a trunk interface allowing all VLANs, G0/0/2 on SWC must also be a trunk interface to match and carry VLAN 2 traffic.

Using an access port on G0/0/2 would prevent VLAN 2 traffic from passing correctly, as it would expect untagged traffic only for VLAN 2, which conflicts with SWB’s trunk configuration.

This option is incorrect because it mixes access and trunk port types inappropriately for inter-switch links.

Conclusion:

To ensure communication between Host A and Host B (both in VLAN 2), SWC must:

Create VLAN 2.

Configure G0/0/1 and G0/0/2 as trunk interfaces allowing VLAN 2 traffic.

Option C fulfills these requirements, making it the correct answer.

Answer: C

References from HCIA Datacom Documents:

HCIA Datacom V3.0, Chapter 4: VLAN Technologies – Access and Trunk Port Configurations

HCIA Datacom V3.0, Chapter 4: VLAN Trunking and Inter-VLAN Routing – Configuring Trunk Ports for VLAN Traffic

Huawei VLAN Configuration Guide (HCIA Datacom Certification Material) – VLAN Creation and Port Link Types

In STP, the root bridge is elected based on the lowest bridge priority. If there is a tie in bridge priority, the device with the lowest MAC address is selected as the root bridge. This process ensures a stable, predictable root bridge selection in the network​.

Comprehensive Explanation: When Router A forwards the packet to Router B, the destination IP address (11.0.12.1) remains unchanged as it is still meant for Host B. However, the destination MAC address changes to MAC-B, which belongs to Host B, since MAC addresses are only used for local network hops​

In Huawei’s VRP, the default preference value for OSPF routes is generally 10, but this value can be adjusted based on configuration requirements. Therefore, it is not necessarily always set to 10, as network administrators may alter the preference to prioritize different routes. This flexibility allows customization based on the network ' s specific routing needs​.

Switch Forwarding Behavior:

If the destination MAC is not found in the MAC address table, the switch floods the frame.

Broadcasting Within VLANs:

VLAN tagging ensures the frame remains within its designated VLAN.

The frame is not sent to all interfaces but only within the VLAN.

Why Other Options Are Incorrect:

A: Does not consider VLAN segmentation.

C: Switches do not discard unknown unicast frames unless configured to do so.

D: Includes access interfaces only, but flooding happens on all VLAN interfaces.

Conclusion:

The switch floods the frame within the VLAN, making the correct answer B.

Understanding ARP Entries:

Each ARP entry associates a MAC address with an IP address dynamically or statically.

In the table, the MAC address 00e0-fc99-9999 is linked to multiple IP addresses across different interfaces.

Dynamic MAC Address Assignment:

As the host changes its IP address, the MAC address remains consistent.

Conclusion:

The statement is TRUE because the MAC address 00e0-fc99-9999 appears with three different IP addresses dynamically.

An access port is a switch port assigned to a single VLAN and used to connect end devices (such as PCs or printers).

Access ports do not send VLAN tags. They remove the VLAN tag before forwarding frames to the connected device because most end devices do not support VLAN tagging.

Option A (Incorrect): Tagged frames are sent only by trunk ports, not access ports.

Option B (Correct): The access port strips the VLAN tag before forwarding the frame to ensure compatibility with non-VLAN-aware devices.

Option C (Incorrect): VLAN tags are not exchanged between inbound and outbound ports.

Option D (Incorrect): The access port does not attach PVID information to the frame when sending it out.

Thus, the correct answer is B.

Comprehensive Explanation: The quit command is used to return from the system view to the user view in Huawei ' s VRP (Versatile Routing Platform). This command allows users to exit the current configuration mode and revert to the default user view. For example, when you are in the system view and you want to return to the user view, typing quit takes you back to the initial prompt without saving the current configuration​​.

Comprehensive Explanation: In this configuration, LSW1 and LSW2 have trunk links that allow VLAN 10 to pass between them. When a ping is sent from R1, the frame is tagged with VLAN 10 on LSW2, and this tagged frame is forwarded to LSW1. Since the trunk allows VLAN 10, the tagged data frame is successfully received and processed by LSW1.