Both gateways and routers are used in the network, mainly to connect hosts on different subnets. Both of these are hardware facilities, and they can forward packets arriving at the host. There are many things in common between the two devices, but there are still many essential differences between the gateway and the router. The following describes the difference between the gateway and the router.
Nowadays, many users don't know much about the difference between the gateway and the router. There is only a vague impression on the use of the two, so there are many problems in the purchase and use. . What is the difference between a gateway and a router? In the following small series, the user will be introduced in detail.
The difference between gateway and router is introduced - the essence difference
Gateway This device is mainly used to connect two different networks. At the same time, the gateway can also communicate with the hosts on both sides. However, the hosts on both sides cannot communicate directly, and it is necessary to pass through the gateway to communicate. The work of the gateway is in the application layer. Simply put, the gateway is to manage the IP of different network segments. When we do VLANs on the switch, we need to make an IP under the default VLAN interface, and this IP is what we call the gateway.
Router It belongs to the network layer device and usually sends data in units of packets. In the sub-interface of the router, there is a role of splitting the broadcast domain, so when we use the switch as a VLAN, we must make a three-layer route on the router. And the IP address we set out on the subinterface of this router is the gateway. Of course, in today's most common Ethernet, the gateway will be degraded into a router.
Gateway (Gateway) is also known as the network gateway, protocol converter. The gateway implements network interconnection above the network layer. It is the most complex network interconnection device and is only used for different network interconnections of two high-level protocols. Gateways can be used for both WAN and LAN interconnections. A gateway is a computer system or device that acts as a conversion. The gateway is a translator between two systems that use different communication protocols, data formats or languages, or even completely different architectures. Unlike bridges that simply convey information, the gateway repackages the received information to suit the needs of the destination system. Same layer - application layer. As shown below:
A router is a device that connects to various local area networks and wide area networks in the Internet. It automatically selects and sets routes according to the channel conditions, and sends signals in the optimal path in order. The router is the hub of the Internet, "traffic police." As shown below:
The gateway is divided into two types: the transmission gateway and the application gateway. The main function is to act as a conversion. It is essentially the IP address of a network to other networks.
The role of the router is mainly: to connect different networks and information transmission. According to the use, it can be divided into: access, enterprise, backbone, terabit, multi-WAN and 3G wireless.
Gateway It can be a router, a switch or a PC. To communicate in the same network segment, there is no need to intervene the gateway. Only when the host does not communicate with the local network segment, all the data packets need to be sent to the gateway device, and then forwarded through the gateway device. There are routing processing and so on.
Router It is a network layer system. Routers are generally divided into two categories in the current market, one is a single protocol router, and the other is a multi-protocol router. The router can convert the data format and become a necessary device different from the network interconnection between the protocols.
3. The relationship between the gateway and the route is expressed as follows: the gateway is the basis of the network connection, and the route is the bridge of the network connection. As shown below:
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