The correct answer is C. Point to Point Tunneling Protocol.
PPTP is a protocol that allows two computers to connect to each other over a public network, such as the Internet, and create a secure, private connection. This is done by creating a tunnel between the two computers, which is a secure, encrypted connection. PPTP is often used to connect to a remote VPN server, but it can also be used to connect to other computers directly.
A. Point to Point Transmission Protocol is incorrect. This is a protocol that is used to transmit data between two computers that are connected directly to each other. It is not used to create a secure, private connection over a public network.
B. Point to Point Transfer Protocol is incorrect. This is a protocol that is used to transfer data between two computers that are connected directly to each other. It is not used to create a secure, private connection over a public network.
D. Point to Point Traffic Protocol is incorrect. This is not a real protocol.