Point to Point Tunneling Protocol (PPTP) belongs to which group?

Point to Point Tunneling Protocol (PPTP) belongs to which group?

• A. Internet Protocol Security (IPsec)
• B. Layer Two Tunneling Protocol (L2TP)
• C. Point to Point Tunneling Protocol (PPTP)
• D. Simple Mail Transfer Protocol (SMTP)

Answer: (C)

PPTP is a tunneling protocol used to create VPN connections by encapsulating PPP frames inside GRE to carry them over an IP network. That places it in the group of tunneling/VPN protocols, which are designed to transport data by forming a secure or semi-secure tunnel across an untrusted network. The other options describe different concepts: IPsec is a security framework for securing IP traffic, not a tunneling method by itself; L2TP is another tunneling protocol (often used with IPsec for security); SMTP is an email transfer protocol. So PPTP is the correct grouping because it itself defines how tunneling is performed.

PPTP is a tunneling protocol used to create VPN connections by encapsulating PPP frames inside GRE to carry them over an IP network. That places it in the group of tunneling/VPN protocols, which are designed to transport data by forming a secure or semi-secure tunnel across an untrusted network. The other options describe different concepts: IPsec is a security framework for securing IP traffic, not a tunneling method by itself; L2TP is another tunneling protocol (often used with IPsec for security); SMTP is an email transfer protocol. So PPTP is the correct grouping because it itself defines how tunneling is performed.