Huawei HCIA-Access V2.5 H35-210_V2.5 Exam Practice Test

Answer : B

The first 24 bits (OUI) of a MAC address are purchased by manufacturers from the IEEE. The remaining 24 bits are assigned by the manufacturer and are not customizable by end-users. While some advanced systems allow temporary MAC address changes, the statement isfalsebecause the OUI is fixed and tied to the manufacturer.

Answer : A

Answer : C

Answer : C

Vectoring in VDSL2 :

Vectoring is a technology used to mitigate crosstalk (interference between adjacent copper lines) in VDSL2 systems, improving data rates and stability.

Crosstalk occurs when signals from one line interfere with signals on another line, especially in bundled copper cables.

Pre-coder Technology :

Pre-coding is a key technique used in vectoring for downstream transmission.

It works by pre-distorting the transmitted signal at the DSLAM (Digital Subscriber Line Access Multiplexer) to cancel out the expected crosstalk at the receiver (CPE).

This ensures that the received signal at each CPE is free from interference caused by other lines.

Other Options :

fdps : Not a recognized term in the context of vectoring or VDSL2.

Canceller : While cancellation is part of vectoring, the specific term 'Canceller' is not used in this context.

Postponed : This is unrelated to vectoring or crosstalk mitigation.

Why C?

Pre-coding is the correct technology used in vectoring to cancel downstream crosstalk in VDSL2.

Thus, the correct answer is C .

HCIA Huawei ACCESS Official Documentation , Chapter: VDSL2 Vectoring.

ITU-T G.993.5 Standards for Vectoring in VDSL2 .

Answer : B

Answer : C

VLANs (Virtual Local Area Networks) are used to logically segment a network into smaller broadcast domains. VLANs can be categorized using various methods:

Port-Based VLANs :

VLAN membership is determined by the switch port to which a device is connected.

Example: Ports 1--10 belong to VLAN 10, and ports 11--20 belong to VLAN 20.

Protocol-Based VLANs :

VLAN membership is determined by the protocol type (e.g., IPv4, IPv6, or AppleTalk) in the packet header.

MAC Address-Based VLANs :

VLAN membership is determined by the MAC address of the device.

Example: Devices with specific MAC addresses are assigned to VLAN 10.

Physical Location-Based VLANs :

VLANs are not categorized based on physical locations. While VLANs can be used to group devices in different physical locations, this is not a standard method of VLAN categorization.

Thus, the correct answer is C , as VLANs are not categorized based on physical locations.

HCIA Huawei ACCESS Official Documentation , Chapter: VLAN Technologies.

VLAN Segmentation Methods by Huawei.

Answer : A

Huawei's broadband access network devices are designed to support multiple technologies for providing connectivity to end users. These devices primarily include:

Copper Line Access Devices : These devices use xDSL (Digital Subscriber Line) technology, which is widely used for broadband access over traditional telephone lines. Examples include ADSL, VDSL, and G.fast.

Optical Access Devices : These devices use PON (Passive Optical Network) technology, which is a fiber-optic-based access technology. GPON (Gigabit Passive Optical Network) and XGS-PON (10-Gigabit Symmetric Passive Optical Network) are examples of PON technologies.

The statement aligns perfectly with the HCIA Huawei ACCESS documentation, which emphasizes the role of access-layer devices in supporting both copper and fiber-based technologies.

HCIA Huawei ACCESS Official Documentation , Chapter: Access Technologies Overview.

GPON and xDSL Technology Whitepaper by Huawei.