1, production of network cables
Before connecting the network, we should first consider the production of the network cable. Generally, if you use twisted-pair network, you need a hub When networking through hub, the method of clamping twisted pair is very simple, just clamp the network cables at both ends one by one. The clamping sequence of both sides is the same, namely: 1, white orange, 2, orange, 3, white green, 4, blue, 5, white blue, 6 and unified. Note that both ends are in the same line order, one-to-one correspondence. This is the wiring standard of 100M network cable, that is, the 568B standard, which is what we usually call the main line or standard line.
However, as a small network with only two machines, it is a bit wasteful to buy a hub of several hundred yuan. In fact, we can directly connect two computers with a network cable without a hub, but there will be some minor changes in the practice of network cable at this time. By changing the order of network cables, two computers can be interconnected without a hub. The specific method is: one end adopts the above-mentioned 568B as the line standard, and the other end switches the positions of 1, No.3, No.2 and No.6 among the eight lines on this basis. At this point, the line sequence of network lines becomes: 1, white green, 2, green, 3, white orange, 4, blue, 5, white blue. This is the 568A standard of 100M network cable, which is what we usually call the anti-line or cross-line. After arranging the line sequence according to the standard of one end 568B and one end 568A and clamping, a network cable suitable for direct connection between two computers is completed.
2. Installation of network card
After the network cable is completed, the next step is to install the network card. Here we take the installation process of TP-Link TF-3239V network card (10m100m dual-speed adaptive network card with REALTEK8 139 main chip) under WIN98 as an example to briefly introduce it.
First, turn off the power of the host, insert TF-3239V network card into an idle PCI slot on the motherboard, fix it after insertion, and then start WIN98. After entering WIN98, the system will prompt to find new hardware, enter the hardware installation wizard, and start searching for drivers. We choose "Designated Location", then find the path where the network card driver is located (such as a:\\win98), select it and click OK. At this point, the system will install the network card under other operating systems such as WIN2000, which will not be described here.
3. Network Settings
After the network card is installed, the following is the last and most difficult step of connecting two computers: network setup. Here I also take the network settings under WIN98 as an example. First of all, we need to check whether the network components of the system have been installed completely: select "Network Neighborhood" on the desktop, right-click to open its properties, and whether there are the following items in the configuration list: Realtek 8 139 network card (network card), Microsoft network client (service), TCP/IP protocol (protocol), file and printer service (service) on Microsoft network. To connect to the local area network and enjoy resources, the above components are essential. If not, you can add it directly here. Then set the IP address, select "TCP/IP-Realtek 8 139 Network Card" (TCP/IP protocol setting of network card), open its properties, and enter "192, 1 68,0,1"in the IP address bar, with the subnet mask of ". Then click "OK" to return to the "Network" main screen (the IP address of the other computer is "192,168,0,2" with the same subnet mask). In the identification item, you should enter different names for the two computers, but their workgroups should be the same. Select * * enjoyment level in the access control item. Pay attention to network login when restarting the computer. After the computer starts, enter the Win98 interface. In my computer, use the right mouse button to select the drive or folder that needs * * * enjoyment, click * * * enjoyment in the shortcut menu, enter the * * * enjoyment name in the dialog box, and set the * * * enjoyment type and access password as needed. At this point, a palm will appear on the drive or folder, indicating that you have enjoyed it. Now, we can access another computer through my online neighbors, just like using local resources.
Second, direct cable connection.
It is also a common solution to realize the direct connection between two computers by using direct cable through serial or parallel ports of computers. Compared with using network card to connect, this scheme is more practical for users who do not require high network quality. Its advantages are convenient connection and low cost. Of course, its shortcomings are obvious:
1. The connection distance is relatively short:
The parallel cable length of "cable direct connection" should not exceed 3 meters, and the stability and integrity of data transmission can be guaranteed within this distance range. This method is suitable for connecting two very close computers. If you want to connect the computer at a longer distance, this connection method is definitely not acceptable;
2. When using serial cable connection:
The speed of data transmission may be slow, so if you connect two computers mainly for playing games, this method is generally not suitable. But in general, when you only have two computers, direct cable connection is a good way to save money and simplify the network. In order to realize the direct cable connection between two computers, communication cable is an indispensable accessory, so it is recommended to buy it directly from local computer stores or network companies. Mainly divided into serial lines and parallel lines. It should be noted that the communication line used to connect the computer should be selected, and the communication line used to connect the peripherals such as computers and printers should not be selected. These two kinds of cables are not interchangeable under normal circumstances. After buying the cable, use it to connect two computers. Then start the computer and enter the Win98 system. Select Start → Programs → Accessories → Communication → Direct Cable Connection (if not, the adding method is Control Panel → Add/Remove Programs → "Windows Installer → Communication → Direct Cable Connection". And set "Protocol", "Identification" and "* * * Sharing" in "Network", which is the same as the network settings of the above-mentioned network card connection), set the ports according to the prompts, and set one of them as the server and the other as the client. In the "Direct Cable Connection" option, the host selects "Monitor", the client selects "Connect", and then enter your user name and password to successfully connect, thus realizing the interconnection between the two computers. At this point, the client can use all kinds of resources on the host, including network resources, and you will no longer worry about occupying the hard disk when exchanging data between computers at home or in the office.
These are the simplest and most commonly used methods to realize the interconnection between two computers. There are many other methods, such as connecting with infrared port and sharing remotely through modem. Space is limited here, so I won't introduce them one by one.
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You should know that the biggest feature of LAN is that it can make full use of resources, such as * * shared disk devices, printers and so on. , so that files can be called each other in the established local area network and printed on any * * * shared printer; Of course, we can also use Wingate or Sygate to enjoy a modem online. Or connect to the internet through a proxy server and enjoy extraordinary speed. If you have multiple computers at home, if you want to upgrade your computer game room to an Internet cafe, then you should consider connecting them into a local area network.
Don't find it difficult. In fact, if you just build a small LAN, you can do it yourself by adding a few network cards and some data lines. As we all know, Win98 has built-in PC-to-PC network configuration capability, which makes it easy to build a small network. If there are many computers in your local area network, then you need a mature network operating system to manage the network, such as WinNT, Netware or Linux.
Serial-parallel port communication network
If we just want to connect two pcs with Windows operating system, we can connect two microcomputers directly through the serial port and parallel port of the computer, using serial port and parallel port communication line (pc-to-PC), and then select the dial-up network adapter of Microsoft and IPX/SPX compatible protocols and protocols in the Windows control panel/network. Then start the control panel, select Add/Remove Programs, click Install Windows Programs, select Communication, click Direct Cable Connection, and then use the Windows installation disk to install. After installation, restart the computer. Select a computer as the host, right-click a drive (such as drive C) in the host "My Computer", select "* * * Enjoy", and select * * * Enjoy Level. Run "direct cable connection" in the accessories of two machines respectively, and select the communication port used on the host. Select another client, follow the prompts, wait a moment, and then finish online. Open Online Neighborhood on the client desktop, and you will find that you are no longer lonely. You can access your own host through my online neighbors, or you can map a network drive to your own virtual physical drive by "mapping network drives". Even better, if the host you are connected to is already on the LAN, you can also access all online resources through the host. Moreover, the normal work of the host computer will not be affected when accessing, which is especially beneficial to users of notebook computers.
Network card communication network
When there are more than two personal computers (PCs), network cards, network cables and hubs are needed. A LAN without a network card is like a river without bridges on both sides. Network card is the abbreviation of NIC (Network Interface Card) and one of the most basic components of LAN. The network card is installed in the expansion slot of the network computer and server, and acts as the physical interface between the computer and the network, so it can be simply said that the network card is a bridge to receive and transmit data. According to the transmission rate, network cards can be divided into 10Mbps network cards (ISA socket or PCI socket), 100Mbps PCI socket network cards,10mbps adaptive network cards and gigabit network cards. At present, 10Mbps ISA socket network card still occupies a certain market share with its low price, but because the network transmission rate of 10Mbps ISA socket network card is low, it takes up a lot of CPU resources, so it is only suitable for those local area networks that do not require high speed. Therefore, I recommend using 100Mbps PCI socket network card or10 Mbps adaptive network card, which is cheap and can adapt to the application environment with many users, large amount of online data transmission and need to transmit multimedia information.
When choosing a network cable, you should first look at the interface type of the network card you bought. There are two kinds of network card interfaces (RJ45 and BNC): BNC port is a network card interface with thin coaxial cable as transmission medium. RJ45 is a network card interface using twisted pair as transmission medium. The interface of RJ45 is similar to that of telephone line, but the network line uses an 8-core connector. The disadvantage of using RJ45 is that the setup cost is high, but the installation and maintenance are convenient, so we generally use RJ45 interface. HUB (Hu: according to the number of microcomputers, the HUb is used to form a star structure. When there are many workstations, the processing speed of the hub is much lower than the transmission speed of the communication line, thus causing the bottleneck problem. So you can choose the switch if you have the conditions. The domain formed by a Hub is called a collision domain, that is, when any computer on the network sends and receives data, all other computers can receive it, and these computers cannot send and receive data at the same time, otherwise a collision will occur (CSMA/ CD protocol will prevent collision). In addition, each computer connected to the hub must check the destination address of the received data to confirm whether it has received its own communication information. Therefore, the computer's CPU utilization rate is high, and the whole network communication efficiency is low, which is only suitable for small workgroup applications.
The role of a hub or switch:
(1) Only one workstation (network card) is connected to each twisted pair interface, and the signal is transmitted point to point.
(2) When a port receives a signal, the hub will shape it and broadcast it to all other ports.
(3)HUB itself can automatically detect signal collision, and immediately send out a jam signal to inform other ports when a collision occurs.
(4) When the transmission line or network card of a port fails, the HUB automatically isolates the port so that it will not affect the normal work of other ports. Because the current 100MB switch is very cheap, 100Mbps network card and1000 MB switch are generally selected.
All components required for the LAN have been completed. Now come with me to install the LAN based on Windows2000 Professional, the most stable personal operating system, step by step. The above content is reproduced, but it is very practical.