Which are correct in the following statement about the WLAN bypass side of the network? (Multiple choice)

Which are correct in the following statement about the WLAN bypass side of the network? (Multiple choice)
A . Bypass the networking cannot modify the existing physical topology of the case of WLAN deployment to facilitate network transformation
B . When the network is connected, AC can no longer assume the gateway of the service VLAN
C . The use of "next to the network + direct forwarding" network architecture can reduce the burden on the AC to improve network forwarding performance
D . When the VPN is connected, the AC can be connected to the aggregation layer or the core layer switch, but the AP and the AP are the same network segment.

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Answer: AC