Final answer:
Site-to-site VPN enables connectivity between two networks by securely connecting the entire networks, allowing users in different locations to access the resources of each network.
Step-by-step explanation:
The correct answer is Site-to-site VPN. This type of VPN enables connectivity between two networks by securely connecting the entire networks. It allows multiple users in different locations to access the resources of each network as if they were directly connected, creating a virtual network between the two sites. For example, a company with branch offices in different locations can use site-to-site VPN to connect all the offices securely and allow employees to access resources at any location.