What is a gateway and its function

Gateway Introduction

What is a gateway? In layman’s terms: it refers to the “gateway” that connects this network to another network. Everyone knows that to walk 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, a gateway is a “gateway” that connects one network to another. Gateway is also called Internet connector and protocol converter.

In the Internet network we are familiar with, the role of a gateway is an intermediate device that connects the internal network with other networks on the Internet. The gateway is our common “router”.

A more simple explanation

If you still don’t understand the above explanation, then let’s use an example from real life to explain what a gateway is.

Suppose your name is Xiao Doian, you live in a big yard, your neighbors have many friends, and there is an Uncle Li who watches the gate in the reception room at the door. Uncle Li is your gateway. When you want to play with a friend in the yard, as long as you shout his name in the yard, he will respond to you and run out to play with you.

But you are not allowed to go out of the door. All contact you want to have with the outside world must be made by Uncle Li (gateway) at the door to help you contact him by phone. Suppose you want to chat with your classmate Xiao Ming. Xiao Ming’s family lives in another courtyard far away. There is also a gatekeeper in his courtyard, Uncle Wang (Xiao Ming’s gateway). But you don’t know Xiao Ming’s home phone number, but your class teacher has a list of all the students in your class and a phone number comparison table. Your teacher is your DNS server. So you dialed Uncle Li’s phone number at home and had the following conversation:

Little one: Uncle Li, I would like to ask the class teacher to check Xiao Ming’s phone number, okay?

Uncle Li: Okay, you wait. (Then Uncle Li hung up the phone to your class teacher and asked for Xiao Ming’s phone number) Yes, his home number is 211.99.99.99

Little one: Great! Uncle Li, I want to find Xiao Ming. Please help me contact Xiao Ming.

Uncle Li: No problem. (Uncle Li then sent a request to the telephone company to connect Xiao Ming’s home phone. The last step was of course to be transferred to Uncle Wang in the courtyard of Xiao Ming’s home, and then Uncle Wang transferred the call to Xiao Ming’s home)

In this way, you got in touch with Xiao Ming.

The role of gateway

In the Internet network we are familiar with, the role of a gateway is an intermediate device that connects the internal network with other networks on the Internet. The gateway is our common “router”. The gateway address is an address that can be understood as a channel for information transmission between the intranet and the Internet. According to different classification criteria, there are many types of gateways. In the TCP/IP protocol, gateways are the most commonly used, and the “gateways” we talk about here all point to TCP/IP. Gateway under the protocol.

A gateway is a computer system or device that plays an important role in conversion. When using different communication protocols, data formats or languages, or even two systems with completely different architectures, the gateway is a translator reproduced from Computer Pepsi Network. Unlike the bridge that simply transmits information, the gateway repackages the received information to adapt to the needs of the intended system. At the same time, the gateway can also provide filtering and security functions. This is why when we have a router to access the Internet, we must set the default gateway address in the computer to the address of the router’s LAN interface, because the router’s LAN interface is the gateway of your network, and your computer To access the Internet, data packets must be forwarded through the gateway. Nowadays, home routers generally use 192.168.1.1 and 192.168.0.1 as the addresses of the LAN interface. These two addresses are also the most common gateway addresses. Simply put, the gateway is the bridge between the device and the router. Only correct gateway configuration can truly ensure that users can access the Internet normally.

Industrial IoT Gateway

Speaking of gateways, we have to mention industrial IoT gateways. Through the above explanation, we know that gateways are routers, so it is not difficult to understand industrial IoT gateways. Industrial IoT gateways are industrial routers, which are different from ordinary routers. Differently, the functions and performance of industrial routers are more enhanced, such as anti-interference ability, working environment: it can work normally in the environment of -40℃~80℃. So they are commonly used in the wild or some industrial environments.

This industrial router developed by Zongheng Intelligent Control is a multi-interface wireless gateway developed based on QuecOpen, and it also has powerful RTU functions. Developed using an embedded Linux system, with built-in 256MB RAM and 256MB Flash, it supports 4G wireless network high-speed transmission. Supports WIFI Internet access function, etc.