Huawei H35-210_V2.5 Exam Questions Instant Access

Question 1

The OLT supports multiple protection switching modes for GPON lines. The ( ) technology is supported by the OLT to protect the backbone and branch optical fibers at the same time.

AType C

BType D

CType A

DType B

Answer : A

GPON networks use various protection mechanisms to ensure high availability and reliability. These mechanisms are classified into different types based on their scope and functionality:

Type A :

Protects only the trunk fiber (between the OLT and the splitter).

Does not protect branch fibers (between the splitter and ONUs).

Type B :

Protects the trunk fiber but does not provide simultaneous protection for branch fibers.

Type C :

Provides full protection for both the trunk and branch fibers.

Uses redundant fibers and splitters to ensure continuity in case of a failure.

Type D :

Not a standard GPON protection type.

Since the question specifies protection for both the backbone (trunk) and branch fibers, the correct answer is Type C .

HCIA Huawei ACCESS Official Documentation , Chapter: GPON Protection Mechanisms.

GPON Redundancy and Protection Schemes by Huawei.

Question 2

Which of the following statements are incorrect ?

AWDM1r multiplexers can be deployed close to the CO or user as required.

BGPON and XGS-PON have different rates but the same network architecture. Therefore, to ensure that the device supports XGS-PON, you only need to change the optical modules on an ONU.

CThe deployment of WDM1r multiplexers does not affect the calculation of optical link attenuation.

DBecause the center wavelengths of XGS-PON and GPON are different and do not overlap or conflict with each other, they can share an optical distribution network (ODN).

Answer : B, C

Let us analyze each statement:

Option A :

Correct : WDM1r multiplexers can be flexibly deployed close to the Central Office (CO) or closer to the user, depending on network design requirements.

Option B :

Incorrect : While GPON and XGS-PON share the same ODN architecture, simply changing the optical modules on an ONU is insufficient to support XGS-PON. The ONU hardware and software must also be compatible with XGS-PON standards.

Option C :

Incorrect : The deployment of WDM1r multiplexers introduces additional optical loss, which must be accounted for in the calculation of optical link attenuation.

Option D :

Correct : GPON (1490 nm downstream, 1310 nm upstream) and XGS-PON (1577 nm downstream, 1270 nm upstream) use non-overlapping wavelengths, allowing them to coexist on the same ODN using WDM.

Thus, the incorrect statements are B and C .

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

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

Question 3

The customer needs to access the following information points: AP, PC, IP camera, and IPTV. The AP is powered by the ONU. The types of ONU interfaces include:

AGE, GE (PoE), Wi-Fi

BGE, GE (PoE), RF

CGE, GE (PoE), POTS

DGE, GE (PoE)

Answer : A

GE (PoE):Powers the AP.

GE:Connects to PC, IP camera, and IPTV.

Question 4

Which of the following statements about IP routes are correct?

AIn a LAN, a route consists of the following parts: IP address and MAC address.

BIP routes are used to guide IP packet forwarding.

CRouting is a concept at the second layer of the OSI model.

DAny route must contain the following information: source address, destination address, and next hop.

Answer : B

Let us analyze each option:

Option A : Incorrect. A route does not include MAC addresses. It typically consists of a destination network, subnet mask, next-hop address, and outgoing interface.

Option B : Correct. IP routes are essential for guiding the forwarding of IP packets from the source to the destination. Routers use routing tables to determine the best path for packet delivery.

Option C : Incorrect. Routing is a concept at the network layer (Layer 3) of the OSI model, not the data link layer (Layer 2).

Option D : Incorrect. A route does not require the source address. It only needs the destination network, subnet mask, and next-hop information.

Thus, the correct answer is B .

HCIA Huawei ACCESS Official Documentation , Chapter: IP Routing Basics.

Routing Fundamentals in IP Networks by Huawei.

Question 5

In a GPON system, which of the following statements about T-CONTs are correct? (Select All that Apply)

AAll GEM ports must be mapped to T-CONTs.

BAll ONUs/ONTs connected to the same PON port can use T-CONTs with the same Alloc-ID.

CThe OLT transmits services upstream in dynamic bandwidth assignment (DBA) scheduling mode.

DCarrier that carries services in the GPON upstream direction.

Answer : A, C

A:GEM ports must map to T-CONTs for upstream QoS.

C:DBA dynamically allocates upstream bandwidth to T-CONTs.

B (Incorrect):Alloc-IDs must be unique per ONU.

Question 6

When carrying services, the GEM port needs to map services to the T-CONT units for upstream service scheduling. Each ONU supports multiple T-CONTs, and different types of T-CONTs can be selected for different service types.

ATRUE

BFALSE

Answer : A

Question 7

The OLT is interconnected with a LAN switch through the GE optical port. The working modes of the two ports can be either auto-negotiation or forced.

ATRUE

BFALSE

Answer : B

Huawei HCIA-Access V2.5 H35-210_V2.5 Exam Questions