H35-211_V2.5 Exam Dumps : HCIP-Access V2.5

Ethernet VLAN identifiers provide a practical limit of about 4K per broadcast domain. As user counts and services grow toward this boundary, Huawei recommends dual-layer VLAN (QinQ) to extend scale and maintain service isolation. Hence the planning threshold is ~4K.

Type B protection (OLT-side + feeder protection via 2×2 optical splitter) is designed for automatic protection switching (APS) upon detecting faults such as LOS/LOF on the working port or feeder. The system automatically switches to the standby PON port/feeder without manual intervention (manual cutover is optional but not required for protection).

(Reference: HCIP-Access V2.5 – GPON Type A/B/C protection definitions, trigger conditions, and APS behavior.)

XG-PON (10G GPON) adopts XGEM framing. Compared with GPON’s 12-bit GEM Port-ID, XGEM expands the Port-ID field to 16 bits, increasing the number of logical data flows that can be identified per ONU/OLT and improving service granularity. Hence the correct length is 16 bits.