H12-311: HCIA-WLAN V3.0Demo

By Huawei · Question Mode

QuestionQ21

高级路由交换技术

Which statements about the AC discovery phase while establishing a CAPWAP tunnel are true?

  • A On a Layer 2 WLAN, an AP can discover ACs using DHCP Option 43.
  • B An AC can have the MAC address of an AP pre-configured so that the AP can discover the AC through ARP.
  • C An AP can have the IP addresses of ACs pre-configured.
  • D On a Layer 3 WLAN, an AP can discover ACs by broadcasting Discovery messages.
Explanation

An AP can be configured with the IP addresses of its ACs, allowing it to contact those controllers directly during CAPWAP discovery. Layer 2 discovery uses broadcast discovery messages, whereas Layer 3 discovery requires a routable controller-address discovery mechanism such as static configuration, DHCP option data, or DNS.

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