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 Layer-3 protocol suite that provides authentication (AH) and encryption (ESP) for IP packets, and is the foundation of IKEv2-based VPNs and site-to-site tunnels.

HTTP is an unencrypted application-layer protocol and provides no confidentiality or authentication suitable for a VPN.

SFTP (SSH File Transfer Protocol) is used for secure file transfers, not for establishing VPN tunnels.

VNC (Virtual Network Computing) is a remote desktop sharing protocol and does not create VPN tunnels or provide network-level encryption.

SSL/TLS secures VPN connections at the transport layer and is the basis for SSL VPN products such as OpenVPN and Cisco AnyConnect, enabling encrypted tunnels over standard HTTPS ports.

SELinux is a Linux kernel mandatory access control security framework, not a network protocol; it cannot secure a VPN connection.