Final answer:
A VPN server is most commonly located at a workplace, enabling secure remote access to a company's internal network through an encrypted connection.
Step-by-step explanation:
A VPN server is typically located at a workplace. VPN stands for Virtual Private Network, and it allows users to create a secure internet connection over a less-secure network by establishing an encrypted tunnel. VPNs are commonly used in corporate environments to enable employees to access the company’s internal network securely when they are outside of the physical workplace. A company's IT department typically manages the VPN server, ensuring that employees maintain secure remote access to the company's resources. VPN servers can also be set up at home for personal use, though this is less common compared to their widespread use in business contexts.