A gateway-to-gateway VPN, also known as a site-to-site VPN, securely connects entire networks to each other, which is great for linking branch offices. However, it is not designed for individual remote users. On the other hand, client-to-site VPNs, also known as remote access VPNs, are designed specifically for individual users to connect to a network securely from remote locations, providing them with access to internal resources while ensuring the same security as if they were connected locally. SSL VPN allows secure remote access through a web browser without requiring client software installation and is commonly used for specific applications rather than full network access. A personal VPN service is typically used for anonymizing internet activity and does not provide access to internal corporate resources.