Gateway and router in the network which are used, two hardware facilities is mainly used to host different subnets connected. They can be forwarded to reach the host of data packets. Existence of these two devices are many similarities between them, but both gateway and router equipment between them or there are many essential differences.
The essential difference between the gateway and router
Such ?? gateway device which is mainly used to connect two different networks at the same time, it is possible to communicate between the gateway host with both sides simultaneously. But both sides of the host is not able to communicate directly, is the need to communicate through the gateway to. Work at the application layer gateway is among. In simple terms, it is the gateway to manage different IP segment, we generally do VLAN on the switch, it needs to be a default under the IP VLAN interface, and this is what we call it IP gateway.
1, different concepts
Gateway (Gateway), also known as gateways, protocol converters. Implemented in a gateway above the network layer internetworking, is the most complex of the internetworking device, only two different high-level protocol for network interconnection. Gateway can be used for both WAN interconnection, it can also be used for LAN interconnection. Gateway is a computer system or a device for converting the task of acting as. Using different communication protocols, data formats, or language, or even completely different architecture systems, a gateway translator. And bridges simply convey different information, the gateway to the information received repackaged to meet the needs of the destination system. The same layer - application layer.
A router (Router), is connected to the Internet each local area network device, it will automatically selected and set route according to the situation of the channel, the best path, the transmission signal according to the predecessor sequence. Router is the hub of the Internet, "traffic police"
2, different functions
Gateway is divided into transit gateway and application gateway type two categories, the main role is to act as the conversion task, it is essentially a network to other network IP address.
Role of routers are: a different communication network and information transmission effect. Use can be divided according to: access, enterprise, Backbone, terabits, and multiple 3G wireless WAN and the like.
It can be a gateway router, switch or PC. Communicate within the same network, the gateway is not required to intervene only when communicating non-local network segment of the host device, it needs all the packets to the gateway device, and then forwarded via a gateway device or routing processing.
路由器它是一个网络层系统，路由器在现在市场上一般是被分成了两大类，一类是单协议路由器，另一类是多协议路由器。路由器它可以进行数据格式的转换，成为不同于协议之间的网络互连的必要设备。
网关和路由的关系表述为：网关是网络连接的基础，路由是网络连接的桥梁。