2.0 Protocol

There are two basic packet types: data packets and control packets. Data packets contain user data that must be sent to the WAN or was received from the WAN. Data packets are PPP packets encapsulated using the Internet Generic Routing Encapsulation protocol, version 2 (GRE v2).

Control packets are used strictly for status inquiry and signaling information. Control packets are transmitted and received over a TCP connection. Each Windows NT Server and FEP pair will have exactly one TCP connection used for the control channel.

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