What Does Gateway Mean?
A gateway is a data communication device that provides a remote network with connectivity to a host network.
Techopedia Explains Gateway
Any network has a boundary or a limit, so all communication placed within that network is conducted using the devices attached to it, including switches and routers. If a network node wants to communicate with a node/network that resides outsides of that network or autonomous system, the network will require the services of a gateway, which is familiar with the routing path of other remote networks.
