A VPN is used for which purpose?

A VPN is used to secure connectivity, including site-to-site connectivity between networks. Site-to-site VPNs create encrypted tunnels between locations such as branch offices, data centers, and cloud environments. The purpose is to protect traffic as it crosses an untrusted or shared network. Requesting IP addressing is a DHCP function. Arranging packets in the correct order is associated with transport-layer reliability, especially TCP sequencing, not VPN. Creating virtual machines is a virtualization or cloud infrastructure function. VPNs can also support remote access, allowing users to securely connect to enterprise resources from outside the corporate network. Security teams must remember that VPNs protect transport but do not automatically guarantee authorization. Strong authentication, least privilege, device posture checks, logging, and segmentation should also be applied. In simple terms, a VPN creates a protected tunnel, but policy still determines who can use it and what they can reach. Reference/topics: Network Security 3.3, VPNs; Network Security 3.4, tunneling protocols.