Point to Point Tunneling Protocol (PPTP) is one of the oldest protocols by Microsoft. It is the fastest of all VPN protocols. It is ideal for applications where speed is important such as streaming and gaming. But, PPTP is not as secure because of its weak encryption.
When used for remote access over the Internet, PPTP uses the TCP port 1723 for communication. In turn, it uses the GRE protocol. The data packets transmitted through the tunnel are encapsulated. When initiated from the client side, PPTP tunneling doesn’t need devices like routers, etc.
PPTP is not only very easy to set up but also compatible with most desktop and mobile operating systems. Use the protocol when speed is more important than security. It is because because it has many well-known vulnerabilities.
The PPTP protocol uses the GRE and TCP port 1723 for smooth data transmission.
128 bit encryption is the maximum supported using RSA RC4 algorithm.
Due to low level encryption, it offers highest speed as compared to other protocols.