Gateway

Gateway also known as gateways, protocol converters. Gateway at the transport layer to achieve network interconnection, network interconnection is the most complex equipment, only two high-level protocol for interconnection of different networks. Both can be used for wide area network gateway interconnects can also be used for LAN interconnection. Conversion is a responsibility to act as the gateway computer system or device. In the use of different communication protocols, data format or language, or even completely different architecture between the two systems, the gateway is a translator. And the bridge to convey information simply different, the gateway to the information received to re-packaged to suit the purpose systems. Meanwhile, the gateways can also provide filtering and security features. Most gateway protocol running on top of OSI 7 layer - application layer.