What are the gateway devices?

A gateway device is a computer system or device that provides data conversion services between multiple networks. Gateway devices include: 1. Network switches with three-layer switching functions; 2. Routers; 3. Firewalls; 4. Through software A host with routing enabled.

The operating environment of this article: Windows 7 system, DELL G3 computer.

Gateway device, also known as network connector and protocol converter, is a computer system or device that provides data conversion services between multiple networks. It can be said that a gateway device is a connector between different networks, a device that must undergo "negotiation" when data is sent from one network to another.

Gateway Type

Gateway can be divided into different types according to different standards

• Divided by connecting network:

LAN/Host Gateway: LAN/Host Gateway mainly provides connection services between large computer systems and personal computers

LAN/LAN Gateway: This type of gateway is connected to the LAN /Host gateway is very similar, except that this kind of gateway is mainly used to connect multiple LANs that use different communication protocols or data transmission formats. At present, most gateways belong to this type of gateway.

Internet/LAN gateway: This kind of gateway is mainly used for access and connection control between LAN and the Internet.

• Divided by product function:

Data gateway: Data gateway usually provides data conversion between multiple networks using different protocols and data formats Function.

Application gateway: The application gateway is a dedicated system for data translation in environments that use different data formats.

Security gateway: Security gateway is the collective name for various hardware devices or software that provide system (or network) security. It is an organic combination of various technologies, and the protection scope ranges from low-level protocol data packets to high-level Specific applications of levels.

The gateway can be the following equipment:

1. A network switch with layer 3 switching function.

2. Router.

3. Firewall.

4. The host has the routing function enabled through software.

In general, any network device or host device with routing function can be used as a gateway.

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