Free Practice Questions for Huawei H35-210_V2.5 Exam

Comprehensive and Detailed Step by Step Explanation:

A (Incorrect): XGS-PON encrypts the payload, not the entire packet.

GPON Wavelengths :

GPON networks use specific wavelengths for upstream and downstream transmission:

Downstream (OLT to ONU) : 1490 nm.

Upstream (ONU to OLT) : 1310 nm.

Optional CATV overlay : 1550 nm (used for video services).

Why 1490 nm?

The ITU-T G.984.x standards specify 1490 nm as the wavelength for downstream data transmission in GPON networks. This wavelength is chosen for optimal performance in fiber-optic communication.

Other Options :

850 nm : Used in multimode fiber for short-distance communication, not in GPON.

1310 nm : Used for upstream transmission in GPON.

1550 nm : Optional wavelength for CATV overlay, not for standard downstream data.

Thus, the correct answer is A .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: GPON Wavelengths.

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

Comprehensive and Detailed Step by Step Explanation: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.

ONT Line Profile Overview :

An ONT line profile defines the mapping and configuration of services for an ONU (Optical Network Unit) on the OLT.

Key Parameters :

Mapping between GEM ports and data packets : Specifies how data packets are mapped to GEM (GPON Encapsulation Method) ports for transmission.

GEM ports : Logical ports used to encapsulate and transmit data over the GPON network.

T-CONT (Transmission Containers) : Allocates upstream bandwidth for different service flows.

Number of Ethernet ports on the ONT : This is a hardware attribute of the ONT and is not defined in the line profile.

Why A, B, C?

These parameters are directly related to the configuration of services and are included in the ONT line profile.

The number of Ethernet ports is unrelated to the line profile and is determined by the ONT hardware.

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

References:

HCIA Huawei ACCESS Official Documentation , Chapter: ONT Line Profiles.

GPON Service Configuration Guide by Huawei.

DHCP Relay Agent Functionality :

A DHCP relay agent forwards DHCP packets between clients and servers located in different subnets.

It modifies the packet headers to ensure proper delivery:

Converts broadcast packets from clients into unicast packets to forward them to the DHCP server.

Converts unicast responses from the DHCP server back into broadcast packets for delivery to clients.

Why C?

The DHCP relay agent performs bidirectional conversion between broadcast and unicast packets to facilitate communication between clients and servers in different subnets.

Other Options :

A : Incorrect because DHCP relay agents do not convert packet types (e.g., Ethernet vs. non-Ethernet).

B : Incorrect because the relay agent handles both broadcast-to-unicast and unicast-to-broadcast conversions.

D : Incorrect because the relay agent modifies unicast packets during forwarding.

Thus, the correct answer is C .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: DHCP Relay Agent.

RFC 2131: DHCP Protocol Specification .

The MA5600T/MA5680T is a Huawei Optical Line Terminal (OLT) device used in GPON networks. The status of the control board's indicator lights provides critical information about the device's operational state.

Option A :

Incorrect : If the green light is on and off repeatedly without a specific pattern, it may indicate an unstable or faulty state.

Option B :

Correct : A steady green light indicates that the control board is running properly and is in a normal operating state. This is the expected status for a healthy control board.

Option C :

Incorrect : A blinking pattern of 0.5s on and 0.5s off typically indicates that the control board is in a transitional state, such as booting up or initializing.

Option D :

Incorrect : A rapid blinking pattern of 0.25s on and 0.25s off usually signifies an alarm or error condition.

Thus, the correct answer is B , as a steady green light indicates normal operation.

References:

HCIA Huawei ACCESS Official Documentation , Chapter: OLT Device Indicators.

MA5600T/MA5680T Maintenance Manual by Huawei.

Testing Board Reset :

Testing the reset functionality of an OLT board ensures that the board can recover from failures or configuration changes.

Methods for Testing Reset :

Hot Swap : Physically removing and reinserting the board tests its ability to initialize and function after a reset.

RESET Button : Pressing the physical RESET button on the board forces a hardware reset, verifying recovery capabilities.

Reset Command : Using CLI commands (e.g., reset board) resets the board remotely, allowing verification of software-based recovery.

Why D?

All three methods are valid ways to test the reset functionality of an OLT board. Each method addresses different scenarios and ensures comprehensive testing.

Thus, the correct answer is D .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: OLT Maintenance.

OLT Hardware and Software Reset Procedures by Huawei.