What is network connection, and what are the several ways of network connection?

Well, I'm engaged in the network, let me tell you carefully, first of all, the computer and the computer should interact, and the server should interact, similar to an agreed language, to both sides agreed, this is the protocol in the network, what is the network, first of all, physically, that is, the network cable that connects various computer equipment, and various network equipment (switches and routers, etc.), the organization of the network is actually very complex, because the number of equipment is growing too rapidly, In fact, the function of the computer's network card is to process the information you want to send into a digital bit stream in accordance with the ios7 layer protocol, and then reverse convert it after someone else's computer gets the data. Said data packets, data frames, the landlord may not be able to recognize clearly, The network is connected to the computer and the computer, to achieve information sharing and interaction, and so on, to make the world so exciting, information ** so fast, By the way, there are a lot of network interfaces, Half of them are also a lot, Generally refers to the physical port, It's the interface on the physical level.。。。 If there is anything else the landlord doesn't understand, you can ask me.

To put it simply, there are two meanings: 1, it refers to the virtual interface used by the program to exchange data with the network in programming; 2. It is the interface at the physical level, such as the network cable interface (RJ45 port) on the common network card.

At present, the main types of home network connection lines are ** lines, optical fibers and network cables.

1. Optical fiber to the home, the home line provided by the operator is optical fiber, which needs to be used with optical modems, which is also the most common connection method at present.

Second, the first line to enter the home, the operator provides the home line for the first line, which needs to be used with modem (cat), which is generally the broadband line of China Telecom. If there is a wire splitter, please connect the home line to the splitter before connecting the cat.

3. The network cable enters the home, and the operator (such as telecom broadband) or the community wide old slow belt directly provides you with broadband services through the network cable. This is also known as cell broadband, which is generally provided by non-telecom operators, and is usually cheaper, but the network is stable.

The way to connect to the network

It is divided into PPPoE broadband.

There are three types of Internet access: DDU dial-up, dynamic IP address Internet access, and static IP address Internet access. The most obvious reply to the DAOPPOE broadband dial-up Internet access is that the network cable must be answered through the modem (that is, the modem), and then use the broadband account and password to carry out the broadband dial-up Internet connection mode;

Dynamic IP address, no need for the user to use any device, directly connect to the computer, the computer set the IP address and DNS server address to be automatically obtained, you can automatically access the Internet, no need to set any Internet access mode;

To access the Internet with a static IP address, you only need to fill in the specified IP address and DNS server address obtained from the network operator and fill it into the computer to access the Internet.

Use a variety of network devices and lines to connect your computer, and you can quickly transfer data, files, and share printers through the network, but you can't do this without a network connection. Common situations that can cause abnormal network connections include:1

The network is disconnected, but it often shows that you can't connect2The network is blocked, so you can't get a reply packet within the program's default wait time 3The network is unstable, and the network cannot fully transmit server information 4

System: The system resources are too low to provide sufficient resources for the program to process the server information 5The network is unstable, such as loose network cables, interfaces that are not plugged in, etc. 6

If the network speed is too slow, if you use the shared bandwidth, you must also prevent others from maliciously occupying the bandwidth 7Medium viruses, Trojans, etc.