A network gateway provides interoperability between networks and includes devices, such as protocol translators, impedance matchers, frequency converters, error isolators, or signal translators. A network gateway requires the establishment of mutually acceptable administrative procedures between the networks that use the gateway. Network gateways, also known as protocol translation gateways or mapping gateways, can perform protocol conversions to connect networks to various network protocol technologies. For example, a network gateway connects an intranet in the office or at home to the internet.