Huawei HCIA-Access V2.5 H35-210_V2.5 Exam Practice Test

Answer : A

Answer : A, B, C

VLAN link types define how VLAN traffic is handled on switch ports. The three common VLAN link types are:

Access Ports :

Used to connect end devices (e.g., PCs, printers) to the switch.

An access port belongs to only one VLAN and carries untagged traffic for that VLAN.

Example: A PC connected to an access port in VLAN 10 sends and receives untagged traffic.

Trunk Ports :

Used to connect switches or routers to carry traffic for multiple VLANs.

Trunk ports tag traffic with VLAN IDs using IEEE 802.1Q encapsulation.

Example: A trunk port connecting two switches carries tagged traffic for VLANs 10, 20, and 30.

Hybrid Ports :

A hybrid port can carry both tagged and untagged traffic.

It is flexible and can be used for scenarios where a mix of tagged and untagged traffic is required.

Example: A hybrid port might send untagged traffic for VLAN 10 and tagged traffic for VLAN 20.

Mix :

This is not a standard VLAN link type and does not exist in Ethernet switch configurations.

Thus, the correct answers are A (Trunk) , B (Access) , and C (Hybrid) .

HCIA Huawei ACCESS Official Documentation , Chapter: VLAN Link Types.

IEEE 802.1Q VLAN Tagging Standards .

Answer : A

Upstream Transmission Overview :

The MA5800 is a next-generation OLT platform that supports multiple upstream transmission options, including 10 GE (Gigabit Ethernet) and GE (Gigabit Ethernet).

Default Configuration :

By default, the upstream ports on the MA5800 are configured for 10 GE transmission. However, administrators can adjust the speed using the speed command to match the requirements of the interconnected device.

Matching Port Rates :

For successful communication, the upstream port rate on the MA5800 must match the rate of the port on the upper-layer device (e.g., switch or router). Mismatched rates can lead to communication failures.

Why TRUE?

The statement accurately describes the default configuration and the importance of matching port rates to ensure proper communication.

Thus, the correct answer is A .

HCIA Huawei ACCESS Official Documentation , Chapter: MA5800 Upstream Configuration.

MA5800 Product Manual by Huawei.

Answer : A, C, D

Dynamic Bandwidth Assignment (DBA) :

DBA is a key mechanism in GPON systems that dynamically allocates upstream bandwidth among ONUs based on their traffic demands.

Functions of DBA :

To provide high-bandwidth services : DBA ensures that ONUs can access sufficient bandwidth for high-priority or bursty traffic, such as video streaming or large file uploads.

To avoid optical signal conflicts : This is achieved through TDMA (Time Division Multiple Access), not directly by DBA. DBA focuses on bandwidth allocation rather than collision avoidance.

To improve upstream bandwidth utilization : By dynamically allocating bandwidth, DBA ensures efficient use of the limited upstream capacity of a PON port.

To dynamically allocate upstream bandwidth : DBA operates in real-time, adjusting bandwidth allocations within microseconds or milliseconds to meet changing traffic demands.

Why A, C, D?

These options accurately describe the functions of DBA. Option B is incorrect because avoiding optical signal conflicts is handled by TDMA, not DBA.

Thus, the correct answers are A, C, D .

HCIA Huawei ACCESS Official Documentation , Chapter: GPON DBA Mechanism.

ITU-T G.984.x Standards for GPON .

Answer : B, C, D

B:Single-tagging requires matching service/user VLAN IDs.

C:VLAN-to-GEM mapping enables service segregation.

D:QinQ uses outer VLAN for aggregation and inner VLAN for user identification.

Answer : A, B, C, D

Comprehensive and Detailed Step by Step All options are valid VLAN types in Huawei access networks:

MUX VLAN: Isolates users within the same VLAN.

Smart VLAN: Dynamically assigns VLANs based on MAC/IP addresses.

Super VLAN: Aggregates multiple sub-VLANs into one logical VLAN.

Answer : B