Free H35-210-V2-5 sample questions

Correct answer: The ONT is from a different vendor and is not interoperable with the Huawei OLT.

While sufficient optical power is necessary, it is not the only requirement for successful registration. The GPON standard includes a management protocol called OMCI (ONT Management and Control Interface) for the OLT to manage the ONT. If the ONT is from a non-certified third-party vendor, its OMCI implementation may be incompatible with the Huawei OLT, leading to a failure during the ranging and provisioning process, even with perfect optical levels. A -22 dBm signal is a healthy level, not too high. A rogue ONT would typically cause issues for other ONTs on the same PON port. Incorrect VLAN configuration affects service provisioning after registration, not the ranging process itself.

Correct answers: The customer premises equipment (CPE) modem must support the G.993.5 (G.vector) standard.; All lines in the same cable binder group must be processed by the same vectoring processing engine (VPE).

VDSL2 vectoring works by having the DSLAM calculate and generate anti-phase signals to cancel out the crosstalk between lines. For this to be effective, two key conditions must be met: 1) The VPE must be able to 'see' and process all the lines within a single cable binder group, as these are the lines that significantly interfere with each other. If lines are split across different VPEs or DSLAMs, system-level vectoring is required, which is more complex. 2) The CPE modem must also be vectoring-compliant (G.993.5) to cooperate with the DSLAM in the crosstalk estimation and cancellation process. Annex type and profile matching are important for basic connectivity and speed, but are not the primary requirements for vectoring itself.

Correct answer: Bind the HSI service to LAN1 with VLAN 100, VoIP service to the POTS port with VLAN 200, and IPTV service to LAN2 with VLAN 300.

The best practice for triple-play service delivery is to use separate VLANs for each service. This allows for logical separation of traffic, enabling distinct QoS policies, security rules, and routing paths for each service type. Binding each service to a specific port (or group of ports) and a unique VLAN ID (e.g., VLAN 100 for HSI, 200 for VoIP, 300 for IPTV) is the standard and most effective method. Using a single VLAN makes QoS differentiation difficult. Using QinQ on the ONT is unnecessary and overly complex for this common residential scenario. Binding all services to a single port would require a managed switch at the customer premise to separate them.

Correct answer: The shared secret configured on the BNG does not match the shared secret on the RADIUS server.

While other options can cause PPPoE issues, the symptom of a correct username/password resulting in an 'Access-Reject' from RADIUS strongly points to a mismatch in the shared secret. The shared secret is used to encrypt the password in the RADIUS Access-Request packet. If the BNG and RADIUS server have different secrets, the server cannot decrypt the password correctly, leading to an authentication failure even if the user typed the correct password. An MTU issue would typically cause problems after the session is established. DHCP Option 82 is unrelated to PPPoE authentication. A faulty RADIUS server would likely affect all users, not just a specific group.

Correct answer: A mechanical connector pair

A mechanical connector pair (like an SC or LC connector) introduces a small air gap between the fiber end faces, which causes a strong reflection (Fresnel reflection). This appears as a sharp reflective spike on the OTDR trace. The connector pair also has insertion loss, meaning less light continues down the fiber, resulting in a visible drop in the backscatter signal level immediately after the spike. A fusion splice is non-reflective and shows only a small loss step. A macrobend is also non-reflective and appears as a gradual loss or a localized drop without a spike. The end of the fiber shows a strong reflective peak but is followed by the noise floor, not a continuing backscatter level.

Correct answer: False

This statement is false. Downstream traffic in a GPON system is broadcast from the OLT to all ONTs on a PON port. Each ONT filters out the frames not addressed to it based on the GEM Port ID. There are no collisions in the downstream direction. Dynamic Bandwidth Allocation (DBA) is used exclusively for managing upstream traffic, where multiple ONTs share the same fiber and must transmit in assigned time slots (TDMA - Time Division Multiple Access) to avoid collisions.

Correct answer: A service-port configured with `user-vlan 10 20` and `port-vlan 500` using the `vlan-stacking` parameter.

To achieve the goal of transparently carrying the customer's internal VLANs (C-VLANs 10 and 20) within the service provider's S-VLAN 500, a QinQ or VLAN stacking configuration is required. On the Huawei MA5800, this is achieved by defining a service-port that specifies which user VLANs (`user-vlan 10 20`) are to be accepted and then stacks the provider's port VLAN (`port-vlan 500`) on top of them. The `vlan-stacking` keyword enables this double-tagging functionality. VLAN translation would replace the customer's VLANs, not transport them transparently. Transparent mode would pass the C-VLANs but wouldn't add the necessary S-VLAN for provider network transport. A simple trunk port is not sufficient for the provider-level encapsulation required.

Correct answer: To allow subscribers in different VLANs to access the same multicast stream without duplicating the stream on each VLAN.

The primary purpose of MVR is to efficiently distribute multicast streams across multiple VLANs. A single multicast VLAN is configured to carry the IPTV streams from the source. Other user VLANs are then configured as MVR receiver VLANs. This allows users in, for example, VLAN 100, VLAN 101, and VLAN 102 to send IGMP join requests and receive the multicast stream from the dedicated multicast VLAN (e.g., VLAN 999), without requiring the multicast router to replicate the stream into each individual user VLAN. This conserves bandwidth and simplifies configuration.

Correct answer: 255.255.255.192

The original network is /24. To create subnets, we need to borrow bits from the host portion. To get at least four subnets, we need to borrow 'n' bits such that 2^n >= 4. Borrowing 2 bits (n=2) gives exactly 2^2 = 4 subnets. Borrowing 2 bits from the host portion of a /24 network results in a new subnet mask of /26. A /26 mask in binary is 11111111.11111111.11111111.11000000. Converting the last octet (11000000) to decimal gives 128 + 64 = 192. Therefore, the correct subnet mask is 255.255.255.192.

Correct answers: Provisioning VLANs and service ports on an OLT.; Maintaining an inventory of network devices and their software versions.

The FCAPS model defines five functional areas of network management. The 'Configuration' component is responsible for gathering and storing device configurations, provisioning new devices and services, and tracking inventory. Therefore, provisioning VLANs and maintaining a device inventory are core configuration management tasks. Monitoring CPU/memory is part of 'Performance' management. Tracking bandwidth for billing is part of 'Accounting' management. Detecting link failures is part of 'Fault' management.