What is a gateway?

Gateway is also called an Internet connector and a protocol converter. The gateway implements network interconnection above the network layer and is the most complex network interconnection device. It is only used for network interconnection between two high-level protocols with different protocols. Gateways can be used for both WAN interconnection and LAN interconnection.

A gateway is a computer system or device that plays the important role of conversion. Used between two systems with different communication protocols, data formats or languages, or even completely different architectures, a gateway is a translator. Unlike bridges that simply convey information, gateways repackage received information to suit the needs of the destination system. Same layer - application layer.

Everyone knows that when walking from one room to another, you must pass through a door. Similarly, sending information from one network to another must pass through a "gateway", which is the gateway. As the name suggests, Gateway [1] is the "gateway" that connects one network to another. That is the network level.

Gateway is also called an Internet connector and a protocol converter. The default gateway is on the network layer to realize network interconnection. It is the most complex network interconnection device and is only used for network interconnection between two high-level protocols with different protocols. The structure of a gateway is similar to that of a router, except for the interconnection layer. Gateways can be used for both WAN interconnection and LAN interconnection.

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