单选题Which statement is true regarding IPsec VPNs?（）AThere are five phases of IKE negotiation.BThere are two phases of IKE negotiation.CIPsec VPN tunnels are not supported on SRX Series devices.DIPsec VPNs require a tunnel PIC in SRX Series devices.
单选题
Which statement is true regarding IPsec VPNs?（）
A
There are five phases of IKE negotiation.
B
There are two phases of IKE negotiation.
C
IPsec VPN tunnels are not supported on SRX Series devices.
D
IPsec VPNs require a tunnel PIC in SRX Series devices.
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