What is L2TP (Layer 2 Tunneling Protocol)?

Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol utilized to assist virtual private networks (VPNs). It utilizes encryption just for its own control messages and does not provide any encryption of content by itself. A User Datagram Protocol (UDP) port is utilized for L2TP correspondence. Since it doesn’t give any security to information like encryption and classification, an encryption convention like Internet Protocol security (IPsec) is regularly utilized with L2TP.