The difference between SSL VPN and IPSec VPN is that IPSec VPN requires installation of a resident VPN client and SSL VPN requires only an installed browser5 . IPSec VPN uses a pre-shared key or certificates to authenticate the endpoints and encrypts the data at the network layer. SSL VPN uses SSL/TLS protocols to authenticate the endpoints and encrypts the data at the application layer. References: Check Point Remote Access VPN Administration Guide R81, [Free Check Point CCSA Sample Questions and Study Guide]