单选题One of your customers has deployed a Layer 3 gateway in the untrusted network. Which gateway mode is appropriate for this customer？（）A Virtual GatewayB Real-IP GatewayC NAT GatewayD Central Gateway
单选题
One of your customers has deployed a Layer 3 gateway in the untrusted network. Which gateway mode is appropriate for this customer？（）
A
Virtual Gateway
B
Real-IP Gateway
C
NAT Gateway
D
Central Gateway
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