Pass the Huawei HCIP-Access H35-210_V2.5 Questions and answers with CertsForce

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.

Let us analyze each statement carefully:

Option A :

Incorrect : In inter-VLAN communication, hosts in different VLANs cannot directly communicate with each other because VLANs are isolated at Layer 2. Communication between VLANs requires a Layer 3 device (e.g., a router or Layer 3 switch).

Hosts do not learn the MAC addresses of devices in other VLANs. Instead, they communicate through a gateway (router or VLANIF interface), and the gateway handles the forwarding.

Option B :

Correct : A VLAN is indeed a broadcast domain . Devices within the same VLAN share the same broadcast traffic, while devices in different VLANs do not.

Option C :

Incorrect : A VLAN is not a collision domain. Collision domains are defined at the data link layer (Layer 2) and are associated with individual switch ports or hubs. VLANs are logical groupings that span multiple switch ports and do not represent collision domains.

Option D :

Correct : VLANIF interfaces (also called Switch Virtual Interfaces, SVIs ) are logical Layer 3 interfaces configured on switches to enable inter-VLAN routing. These interfaces allow communication between VLANs by acting as gateways for each VLAN.

Thus, the incorrect statements are A and C .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: VLAN Fundamentals.

Inter-VLAN Routing and VLANIF Interfaces by Huawei.

GPON vs. XGS-PON :

GPON : Provides asymmetric bandwidth (2.5 Gbps downstream, 1.25 Gbps upstream) and supports up to 128 ONUs per PON port.

XGS-PON : Provides symmetric bandwidth (10 Gbps upstream and downstream) and supports up to 256 ONUs per PON port.

ODN Compatibility :

XGS-PON operates over the same ODN (Optical Distribution Network) as GPON, meaning no changes are required to the existing fiber infrastructure.

XGS-PON uses different wavelengths (1577 nm downstream, 1270 nm upstream) to coexist with GPON on the same ODN using wavelength division multiplexing (WDM).

Why TRUE?

XGS-PON supports higher bandwidth and more users while maintaining compatibility with the existing GPON ODN architecture.

Thus, the correct answer is A .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: GPON vs. XGS-PON.

ITU-T G.9807.1 Standards for XGS-PON .

Routing decisions prioritize the longest prefix match. The destination 9.1.4.5 matches both 9.0.0.0/8 (subnet mask 255.0.0.0) and 9.1.0.0/16 (subnet mask 255.255.0.0). The /16 mask is longer, so the second route (9.1.0.0/16) is selected. Protocol priority (OSPF’s 10 vs. RIP’s 100) and metrics (cost) are irrelevant here because the longest prefix takes precedence.

DHCP Overview :

DHCP (Dynamic Host Configuration Protocol) is used to automate the assignment of IP addresses and other network configuration parameters (e.g., subnet mask, default gateway, DNS servers).

It centralizes IP address management, reducing manual configuration errors.

Key Components :

DHCP Server : Allocates IP addresses and other parameters to clients.

DHCP Client : Requests and receives configuration from the DHCP server.

DHCP Relay : Forwards DHCP packets between clients and servers in different subnets.

Conflict Detection Mechanism :

DHCP includes a mechanism to detect and resolve IP address conflicts.

Before assigning an IP address, the DHCP server sends an ICMP Echo Request to check if the address is already in use. If no response is received, the address is considered available.

Why TRUE?

The statement accurately describes the functionality of DHCP, including centralized management, parameter distribution, and conflict detection.

Thus, the correct answer is A .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: DHCP Protocol.

RFC 2131: DHCP Protocol Specification .