PPTP protocol is a point-to-point tunneling protocol. It separates the control packet from the data packet. The control packet is controlled by TCP and used for strict status query and signaling information. The data packet is encapsulated by PPP protocol first, and then by GREV2 protocol.

L2TP is an international standard tunnel protocol. It combines the advantages of PPTP protocol and Layer 2 forwarding L2F protocol, and can tunnel PPP packets through various network protocols, including ATM, SONET and Frame Relay. However, L2TP does not have any encryption measures, and it is more used in combination with IPSec protocol to provide tunnel verification.

1. network environment comparison

PPTP is the most widely used protocol, which has fast and stable connection speed and is suitable for most networks. L2tp is a secure and compatible protocol, which is suitable for special networks and attaches importance to network security.

2. Speed comparison during connection

PPTP connection speed is very fast. If the server is close and powerful, the connection speed will be much faster than l2tp.

3. Safety comparison

L2TP will be much higher than pptp.

PPTP is suitable for most networks, while L2TP is suitable for special network environments, such as Internet cafes, education networks, Tietong networks, enterprise LANs, etc. These do not support PPTP well, or even support it, and can be used without mapping ports. L2TP can also be used to block PPTP in some areas.