Tunneling Protocol layer 2. Tunneling Protocol is on computer networks to support virtual private network (VPN) goes to work. In this way, no encryption or security is your protocol doesn't provide, but LT2Pto create privacy relies on the protocol encryption inside the tunnel that passes through it.
although there is LT2P operates in Kurdish the same protocol layer in the OSI model. but in fact, a layer protocol of the meeting and from the port, UDP registered 1701 uses.