A Linux user uses a VPN to securely access the company's systems from a laptop. Which of the following protocols are MOST likely used to secure the VPN connection? (Choose two.)

IPSec (Internet Protocol Security) is a widely used suite of protocols that provides cryptographic security for IP networks. It works at the network layer to secure communication between two endpoints, commonly used for site-to-site and remote access VPNs.

HTTP (Hypertext Transfer Protocol) is an application layer protocol for transmitting hypermedia documents, primarily used for web browsing, and does not provide VPN security.

SFTP (SSH File Transfer Protocol) is a secure file transfer protocol that operates over an SSH connection, specifically for transferring files, not for creating a VPN tunnel.

VNC (Virtual Network Computing) is a graphical desktop sharing system that allows remote control of a computer, not a protocol for securing a VPN tunnel itself.

SSL/TLS (Secure Sockets Layer/Transport Layer Security) is a cryptographic protocol designed to provide communication security over a computer network. Modern VPN solutions like OpenVPN and WireGuard heavily rely on TLS for secure data transmission and authentication.

SELinux (Security-Enhanced Linux) is a security architecture for Linux operating systems that provides mandatory access control, but it is not a networking protocol used for VPN connections.