In this implementation, it is only necessary to pay for a single internet account even though many people will be able to use it.
Non-Internet Implementations
An internet server can also be used to expand a LAN by creating a localized IP “sub-group”. In this LAN-to-LAN configuration, the internet server links the two IP subgroups (as shown below). This implementation is useful when the LAN has run out of IP addresses. The internet server uses a single IP address from the first (global) LAN to establish a second (local) LAN, in much the same way it al- lows many users to connect to the internet through a single IP address. PC’s on the second LAN (called a local LAN since the IP addresses of computers on this LAN are managed by the internet server) can still access the internet by setting their Gateway address to the IP address of the local LAN port of the Internet server. Please
