People in the United States in the nineteenth century were haunted by the prospect that unprecedented change in the nation' s economy would bring about social chaos.
【多选题】You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec, which two parameters are required when defining the tunnel interfaceinformation?()
A.
The crypto ACL number
B.
The IPSEC mode (tunnel or transport)
C.
The GRE tunnel interface IP address
D.
The GRE tunnel source interface or IP address, and tunnel destination IP address