A.It allows L2F tunnels across the network.
B.It allows GRE tunnels across the network.
C.It allows PPTP tunnels across the network.
D.It allows PPP to be tunneled across a network
参考答案:D
A.It allows L2F tunnels across the network.
B.It allows GRE tunnels across the network.
C.It allows PPTP tunnels across the network.
D.It allows PPP to be tunneled across a network
参考答案:D