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The questions for H35-210_V2.5 were last updated on Mar 5, 2026.
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Which method is not used for VLAN categorization?
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.
Which type of dynamic bandwidth assignment (DBA) is usually used for configuring AR services?
Dynamic Bandwidth Assignment (DBA) :
DBA dynamically allocates upstream bandwidth among ONUs based on their traffic demands. Different DBA types are used for different service requirements.
DBA Types :
Type 1 : Fixed bandwidth allocation, suitable for constant bit-rate services like voice.
Type 3 : Mixed allocation, combining fixed and assured bandwidth. It is commonly used for AR (Assured Rate) services, which require guaranteed minimum bandwidth with flexibility for additional bandwidth.
Type 4 : Best-effort allocation, suitable for non-critical services like web browsing.
Why B?
Type 3 is specifically designed for AR services, providing both guaranteed and flexible bandwidth allocation.
Thus, the correct answer is B .
HCIA Huawei ACCESS Official Documentation , Chapter: GPON DBA Mechanism.
ITU-T G.984.x Standards for GPON .
The FTP, TFTP, or SFTP mode can be used to transfer files during the upgrade of the access network. The FTP mode is recommended.
File Transfer Protocols :
FTP (File Transfer Protocol) : Provides reliable file transfer with high speed and ease of use.
TFTP (Trivial File Transfer Protocol) : Lightweight but lacks security and reliability features.
SFTP (Secure File Transfer Protocol) : Secure but slower due to encryption overhead.
Recommendation for Upgrades :
During access network upgrades, large files (e.g., firmware images) need to be transferred quickly and reliably.
FTP is recommended because it balances speed, reliability, and ease of use.
Why TRUE?
The statement correctly identifies FTP as the recommended protocol for file transfers during upgrades.
Thus, the correct answer is A .
HCIA Huawei ACCESS Official Documentation , Chapter: Network Upgrade Procedures.
File Transfer Protocols Comparison by Huawei.
The Ethernet technology is a widely used technology. According to different transmission rates, the Ethernet technology is classified into 10 Mbit/s, 100 Mbit/s, and 1000 Mbit/s. The 10 Mbit/s and 100 Mbit/s Ethernet transmission media are twisted pairs, but the 1000 Mbit/s Ethernet is too fast and requires optical fibers as the transmission media.
In a GPON system, dynamic bandwidth assignment (DBA) needs to be configured for ONU upstream transmission. What are the functions of DBA?
Dynamic Bandwidth Assignment (DBA) :
DBA is a key mechanism in GPON systems that dynamically allocates upstream bandwidth among ONUs based on their traffic demands.
Functions of DBA :
To provide high-bandwidth services : DBA ensures that ONUs can access sufficient bandwidth for high-priority or bursty traffic, such as video streaming or large file uploads.
To avoid optical signal conflicts : This is achieved through TDMA (Time Division Multiple Access), not directly by DBA. DBA focuses on bandwidth allocation rather than collision avoidance.
To improve upstream bandwidth utilization : By dynamically allocating bandwidth, DBA ensures efficient use of the limited upstream capacity of a PON port.
To dynamically allocate upstream bandwidth : DBA operates in real-time, adjusting bandwidth allocations within microseconds or milliseconds to meet changing traffic demands.
Why A, C, D?
These options accurately describe the functions of DBA. Option B is incorrect because avoiding optical signal conflicts is handled by TDMA, not DBA.
Thus, the correct answers are A, C, D .
HCIA Huawei ACCESS Official Documentation , Chapter: GPON DBA Mechanism.
ITU-T G.984.x Standards for GPON .
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