Sub-Protocols
Generic Routing Encapsulation (GRE) Point-to-Point Tunneling Protocol (PPTP) Layer Two Tunnel Protocol (L2TP) Ascend Tunnel Management Protocol (ATMP) Mobile IP Layer Two Forwarding (L2F) Rate Based Satellite Control Protocol (RBSCP) Bisync Serial Tunnelling (BSTUN) X25 Over TCP (XOT) Serial Tunneling - Synchronous Data Link Control (STUN-SDLC) Serial Tunnel (STUN)
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Point-to-Point Tunneling Protocol (PPTP)
Serial Tunnel (STUN)
Design
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Layer Two Tunnel Protocol (L2TP)
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Generic Routing Encapsulation (GRE)
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