1. When referring to a network, a gateway is an address used as an entry point into another network. For example: 18.104.22.168 could be used as a gateway. It is common for .1 and .2 to be setup as a network's gateway. The gateway is commonly the address of a network device such as a network router.
2. Gateway is also a U.S. computer company. See our Gateway company information page for additional information about this company.