===== Gateway =====
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]


A **Gateway** normally works at the [[dido:public:ra:xapend:xapend.a_glossary:t:transportlayer|Transport]] and [[dido:public:ra:xapend:xapend.a_glossary:s:sessionlayer|Session Layers]] of the [[dido:public:ra:xapend:xapend.a_glossary:o:osi]]. At the [[dido:public:ra:xapend:xapend.a_glossary:t:transportlayer|Transport layer]] and above, there are numerous [[dido:public:ra:xapend:xapend.a_glossary:p:protocol|protocols]] and standards from different vendors; gateways are used to deal with them. Gateways provide translation between networking technologies such as Open System Interconnection (OSI) and [[dido:public:ra:xapend:xapend.a_glossary:t:tcp|Transmission Control Protocol]]/[[dido:public:ra:xapend:xapend.a_glossary:i:ip|Internet Protocol]] (TCP/IP). Because of this, gateways connect two or more autonomous networks, each with its own routing algorithms, protocols, [[dido:public:ra:xapend:xapend.a_glossary:n:nettopo|topology]], domain name service, and network administration procedures and policies.

Gateways perform all of the functions of [[dido:public:ra:xapend:xapend.a_glossary:r:router|routers]] and more. In fact, a router with added translation functionality is a gateway. The function that does the translation between different network technologies is called a protocol converter.

Source: [[https://blog.netwrix.com/2019/01/08/network-devices-explained/ ]]