Which of the following description of business VLAN is correct? (Multiple choice)

Question

Options

• AMainly responsible for transmitting data of WLAN users when surfing the Internet
• BPVID VLAN under the WLAN ESS interface
• CService VLAN under the service set template
• DIf data tunnel forwarding is adopted, user data will not be transmitted through the service VLAN

• A
  83% (25)
• D
  17% (5)

Explanation

A is correct because the business VLAN (also called service VLAN) is specifically designed to carry internet-bound data traffic from WLAN users - it is the primary data-plane VLAN for wireless clients.

B is correct because in Huawei WLAN architecture, the business VLAN is assigned as the PVID (Port VLAN ID) on the ESS (Extended Service Set) interface, meaning untagged traffic from wireless users is stamped with this VLAN ID.

C is correct because the same VLAN is configured as the service VLAN within the service set template, tying the wireless service profile to the correct VLAN for user traffic forwarding.

D is incorrect because even when CAPWAP tunnel forwarding is used, user data is still ultimately transmitted through the service VLAN - the tunnel carries traffic between the AP and AC, but the AC decapsulates it and forwards it outbound via the service VLAN. D falsely implies the service VLAN is bypassed entirely.

Memory tip: Think of the business/service VLAN as the "data highway" for wireless users - it exists at the ESS interface (B), inside the service set template (C), and carries internet traffic (A). Tunnel forwarding changes how traffic reaches the AC, not which VLAN ultimately delivers it, so D breaks the rule.

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