The method of building company LAN 1;
First of all, hardware preparation: an 8-port PBX, a 4-port routing cat with routing function, a wire clamp, a box of crystal heads (rj45 heads), and a suitable length network cable according to the distance of your computer; Connecting equipment: do a good job of network cable. The network cable adopts T568B standard, that is, orange, blue, green, brown, white, green, white and blue (not available online). Try to put the switch in the middle of each computer, which can save the network cable. Make a network cable from the switch to the cat, and then make a network cable from the switch to each computer. After that, connect the routing cat to the switch, and then connect the switch to each computer. Note that your switch interface is not enough. The rest are all related to cats. Depending on how you connect to the Internet, connect a telephone line or twisted pair to your cat. This sequence is not necessary. Set your cat according to the instructions about cats, and then set the ip address of your computer. The gateway is the ip of the cat, that is, 192. 168.0.x or192.168.1.x subnet mask is 255.255.0, and then you can * * enjoy surfing the Internet. Connect a printer to a computer, and then install a network printer on the computer connected to the printer. You can search with the help of windows, and then enjoy the printer so that other computers can access it. Over.
Method 2 of building company LAN:
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. Have enough food and clothing? . 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.
Establish serial port and parallel port communication network of company LAN.
If you just want to connect two pcs with Windows operating system, we can directly connect two microcomputers through the serial port and parallel port of the computer and use the serial port and parallel port communication line (pc to PC), and then connect them in Windows? Control panel/network? Under it? Adapter? Microsoft's choice? Dial-up network adapter? And then what? Agreement? Are you online? IPX/SPX compatible protocol? And then what? NetBEUI protocol? . And start it? Control panel? , choose? Add/Remove Programs? , click? Install Windows programs? , choose? 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 in the host? My computer? Right-click the drive (such as drive C) and select? * * * Enjoy? , select * * * to enjoy the level. Run-in in the accessories of two machines respectively? Direct cable connection? , on the host, select the communication port to use. Select another client, follow the prompts, wait a moment, and then finish online. Open it? Clients? On the desktop? Online neighbors? You will find that you are no longer lonely. Can you go there? Online neighbors? Access your host, or through? Map network drives? The new method maps the network drive to its own virtual physical drive, and 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.
Establish the company's local area 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 function of constructing the company LAN HUB 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.
To set up a company LAN to connect to it:
1. Install the network card. Turn off the computer, open the chassis, find an idle PCI slot (usually a short white slot), plug in the network card and tighten it.
2. Connect the network cable. Plug one end of the network cable into the network card connector and the other end into the switch or hub.
3. Install the network card driver. When you turn on the computer, the operating system will detect the network card and prompt you to insert the driver disk. Insert the drive disk that came with the network card, and then click? What's next? When Windows finds the driver, the OK screen will be displayed. Click? What's next? . If Windows cannot find the driver, click? Device driver wizard? Are you online? Browse? Button to specify the location of the drive. If your driver is not the latest version, can you open it? Equipment management? , run? Update device driver wizard? , double click? Network adapter? , then select your network card and select? Driver? Press the key, click? Upgrade driver? Button. Windows will prompt you to insert the Windows installation disk, just follow the prompts. You must also give each computer in the network a unique name and the same workgroup name (such as the default workgroup), and then restart the computer. Use gymnastics as a desktop. My computer? Right-click the icon, and then click? Attribute? . In the pop-up dialog box, click? Network logo? , click again? Attribute? , in? Computer? Fill in the machine name to be specified, fill in the unified workgroup name in the workgroup, and click OK to finish.
4. Install the necessary network protocols. On the desktop? Online neighbors? Right-click the icon, and then click? Attribute? , in? Local connection? Right-click the icon, and then click? In the pop-up properties dialog box. Installation? , double click? Agreement? Installation? Internet protocol (TCP/IP)? , double click? Clients? Installation? Microsoft network client? , restart the computer.
5, realize the network * * *. On the desktop? Online neighbors? Right-click the icon, and then click? Attribute? , in? Local connection? Right-click the icon, and then click? In the pop-up properties dialog box. Installation? , double click? Service? Installation? Files and printers on the Microsoft network * * *? , click? Are you sure? These settings will not take effect until you restart your computer. If you want to * * * share a drive or directory, open it in Explorer or on the desktop? My computer? Right-click the drive or directory you want to use and select? * * * Enjoy? , fill in the corresponding content. If you choose * * * to enjoy the whole drive, all directories under this drive will be shared by the network * * *. Open it? Network neighbors? Icon to get a list of computers on the network. Double-click the computer you want to access, and then enter the drive. To map network drives, consult the Windows Help file. If there is a problem accessing the printer or other computers through the network, please check your network cable connection to ensure that the connection and * * * enjoyment settings are correct.
6. Set an optional startup password. When you start the computer for the first time after installing the network driver, a dialog box will pop up to prompt you to type the user name and password of Microsoft Network. Type the user name, which will be displayed automatically every time you start the computer (you can use the computer name specified in step 3). If you don't want to set a password, please leave the password line blank, and then? Are you sure? Otherwise, type the password and confirm it. If the password entered does not match the password set, the computer can run the operating system locally, but it cannot enjoy resources online.