In a wireless network, when a STA moves from one AP coverage area to another AP coverage area, WLAN roaming technology can be used to achieve smooth switching of terminal user services. Which of the…

Question

Options

• AConfigure the same service VLAN
• BConfigure the same data forwarding mode
• CConfigure the same SSID
• DConfigure the same security policy

• A
  13% (4)
• B
  16% (5)
• C
  72% (23)

Explanation

WLAN roaming requires that both APs present themselves as the same logical network to the client device. The SSID (C) must match because a STA identifies a Wi-Fi network by its SSID - if the two APs broadcast different SSIDs, the client sees them as completely separate networks and roaming cannot occur transparently. The security policy (D) must also match because the client authenticates using specific credentials or encryption methods; mismatched policies would force the client to re-authenticate from scratch or fail to associate entirely, breaking seamless service.

Option A (same service VLAN) is incorrect because VLAN assignment is a backend traffic-handling detail - roaming can still occur across different VLANs depending on the WLAN architecture and controller configuration. Option B (same data forwarding mode) is also incorrect because whether traffic is forwarded locally or tunneled through a controller is an infrastructure-level decision that doesn't prevent the client from completing the roaming handshake itself.

Memory tip: Think of what the client device sees and cares about - it looks for the same network name (SSID) and needs to pass the same security gate (security policy). VLAN and forwarding mode are "behind the scenes" decisions the network infrastructure handles, invisible to the roaming client.

No community discussion yet for this question.