What encryption methods are used by a Point$-$to$-$Site VPN gateway connection for secure communication?

Secure Sockets Layer $($SSL$)$ only

Both Secure Sockets Layer $($SSL$)$ and Internet Protocol Security $($IPsec$)$

Point$-$to$-$Point Tunnelling Protocol $($PPTP$)$ only

Internet Protocol Security $($IPsec$)$ only