Huawei H35-210_V2.5 Exam Questions Instant Access

Question 1

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 2

In the downstream direction of the GPON, all ONUs receive the same data because the broadcast mode is adopted. In the upstream direction, because the same optical splitter is used, the data of a branch fiber can also be received by another branch fiber.

ATRUE

BFALSE

Answer : B

Downstream Transmission :

In GPON, downstream data is broadcast to all ONUs. However, each ONU only processes the data intended for it, identified by a unique identifier (ONU ID).

Upstream Transmission :

In the upstream direction, GPON uses TDMA (Time Division Multiple Access) to prevent collisions. Each ONU transmits data during its allocated time slot, and the optical splitter does not allow data from one branch fiber to interfere with another.

Why FALSE?

The second part of the statement is incorrect. Data from one branch fiber cannot be received by another branch fiber due to the TDMA mechanism and the design of the passive optical splitter.

Thus, the correct answer is B .

HCIA Huawei ACCESS Official Documentation , Chapter: GPON Upstream and Downstream Transmission.

GPON System Architecture by Huawei.

Question 3

Which one of the following can effectively reduce the number of entries in a routing table?

ADeploy bidirectional forwarding detection (BFD) to accelerate network monitoring.

BAggregate routes.

CConfigure VLANs.

DIncrease the update frequency of dynamic routes.

Answer : B

Question 4

The parameters required for setting the NMS workstation include: (Select All that Apply)

AName

BCommunity name

CIP address

DRoute

Answer : A, B, C

NMS configuration requires:

A:Device name for identification.

B:SNMP community string for authentication.

C:IP address for communication.

D (Incorrect):Routing is handled by network devices, not NMS parameters.

Question 5

Which of the following statements about XGS-PON key technologies are incorrect? (Select All that Apply)

ATo ensure data security, XGS-PON uses the AES encryption algorithm to encrypt an entire packet.

BThe dynamic threshold adjustment function enables the OLT to adjust the threshold when receiving optical signals.

CThe OLT retains equalization delay parameters unchanged after initial ONU registration.

DThe optical module on the OLT side must support burst transmission.

Answer : A, C

Comprehensive and Detailed Step by Step

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

Question 6

Generally, a Layer 3 switch forwards IP packets more efficiently than a common router. Which one of the following reasons is true?

AAn ASIC chip is used to forward packets, and the forwarding technology of 'one-time routing and multiple-time switching' is used.

BVLANs are configured to suppress broadcast storms, saving bandwidth and system resources.

CHardware with lower specifications is used.

DThe packet-to-packet forwarding technology is used.

Answer : A

Question 7

A school uses the POL networking and has only one campus. During VLAN design, VLANs are divided by service type and services are identified by a single VLAN tag. In this case, which VLAN attribute should be used?

ACommon

BQinQ

CSub

DStacking

Answer : A

VLAN Attributes :

Common VLAN : Used for standard VLAN tagging, where a single VLAN tag identifies the VLAN.

QinQ VLAN : Adds an additional VLAN tag for double-tagging, typically used in carrier networks.

Sub VLAN : Part of a Super VLAN configuration, used for IP address conservation.

Stacking VLAN : Similar to QinQ, used for double-tagging.

Scenario Analysis :

The school uses a single VLAN tag to identify services by type (e.g., student, faculty, administration).

Since only one VLAN tag is used, the appropriate VLAN attribute is Common .

Why A?

Common VLAN is the simplest and most suitable choice for scenarios requiring single-tag VLAN identification.

Thus, the correct answer is A .

HCIA Huawei ACCESS Official Documentation , Chapter: VLAN Design.

IEEE 802.1Q VLAN Tagging Standards .

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