Current location - Plastic Surgery and Aesthetics Network - Plastic surgery and beauty - Questions about local area network
Questions about local area network
it may be that you have not installed the corresponding

network connection tools

IPX/SPX/NetBIOS protocol

We should know that the biggest feature of local area network is that it can make the best use of resources, such as * * * sharing disk devices, printers, etc., so that files can be called to each other within the established local area network and can be used on any one *. Of course, we can also use Wingate or Sygate and other software to enjoy a Modem online. Or connect to the Internet through a proxy server and enjoy extraordinary speed. If you have more than one computer 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 think it's difficult. In fact, if we just set up a small local area network, we can do it ourselves by adding a few network cards and some data lines. As we 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 networking

If you just want to connect two PCs with Windows series operating systems, we can directly connect the two microcomputers through the serial and parallel ports of the computers and use serial and parallel communication cables (pc to pc), and then select the "dial-up network adapter" and "protocol" of Microsoft from the "adapters" under the "control panel/network" of Windows. 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 the * * * Enjoy level. Run "direct cable connection" in the accessories of the two machines respectively, and select the communication port used on the host machine. Choose another client, follow the prompts, wait a moment, and finish online. Open Network Neighborhood on the desktop of Client, and you will find that you are no longer lonely. You can access your host through Network Neighborhood, or map the network drive into your own virtual physical drive through the method of "mapping network drive". 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, when you visit, it will not affect the normal work of the host, which is especially beneficial to the users of notebook computers.

network card communication networking

when there are more than two personal computers (PCs), network cards, network cables and hubs are needed. If there is no network card in the local area network, it is like a river without bridges on both sides. Network card is the abbreviation of NIC(NETWORK Interface Card), which is 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. Network cards can be divided into 1Mbps network cards (ISA socket or PCI socket), 1Mbps PCI socket network cards, 1Mbps/1Mbps adaptive network cards and Gigabit network cards according to the transmission rate. At present, the network card with 1Mbps ISA socket still occupies a certain share of the market at its low price. However, because of its low network transmission rate and occupying a lot of CPU resources, the network card with 1Mbps ISA socket is only suitable for those local area networks that do not require high speed. Therefore, I recommend using a network card with 1Mbps PCI socket or a 1Mbps/1Mbps adaptive network card, which is inexpensive and can adapt to the application environment where there are many users, a large amount of data transmitted online and multimedia information transmission is needed.

when selecting the network cable, you should first look at the interface type of the network card you purchased. There are two types of network card interfaces (RJ45 and BNC): BNC port is a network card interface using thin coaxial cable as the transmission medium. RJ45 is a network card interface using twisted pair as transmission medium. The interface of RJ45 resembles the interface of telephone line, but the network line uses an 8-core connector. The disadvantage of using RJ45 is that it is expensive to set up, but it is convenient to install and maintain, 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 far lower than the transmission speed of the communication line, thus causing bottleneck problems. Therefore, you can choose a 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 can't send and receive data at the same time, otherwise a collision will occur (CSMA/ CD protocol will prevent the collision). In addition, every 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-level applications.

The function of HUB hub or switch:

(1) Each twisted pair interface is only connected to one workstation (network card), and the signal is transmitted point to point.

(2) when a port receives a signal, the HUB reshapes it and broadcasts it to every other port.

(3) the hub itself can automatically detect signal collision, and immediately send out jam (jam) signal to inform other ports when 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 1MB switch is very cheap, 1Mbps network card and 1M switch are generally selected.

all the components needed for the local area network are complete. Now, come with me to set up the local area network step by step based on the most stable personal operating system Windows2 Professional.

steps for connecting the LAN:

1. install the network card. Turn off the computer, open the chassis, find an idle PCI slot (usually a short white slot), insert the network card and screw it in.

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 driver disk sold with the network card, and then click Next. When Windows finds the driver, a confirmation screen will be displayed, and then click Next. If Windows cannot find the driver, click the Browse button in the Device Driver Wizard to specify the location of the drive. If your driver is not the latest version, you can open Device Management, run the Update Device Driver Wizard, double-click Network Adapter, select your network card, select the Driver button, and click the 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. The specific operation is to right-click the "My Computer" icon on the desktop and click "Properties". Click "Network ID" in the pop-up dialog box, then click "Properties", fill in the machine name you want to specify in the name of "Computer", fill in the unified workgroup name in the workgroup, and click OK to finish.

4. Install the necessary network protocols. Right-click the desktop Network Neighborhood icon, click Properties, right-click the Local Area Connection icon, click Install in the pop-up properties dialog box, double-click Protocol to install Internet Protocol (TCP/IP), double-click Client to install Microsoft Network Client, and restart the computer.

5. realize network enjoyment. Right-click the desktop Network Neighborhood icon, click Properties, right-click the Local Area Connection icon, click Install in the pop-up properties dialog box, double-click Services to install Microsoft Network Files and Printers, and click OK. These settings will not take effect until you restart your computer. If you want to * * * enjoy a drive or directory, open My Computer in the Explorer or on the desktop, right-click the drive or directory you want to * * * enjoy, select * * * enjoy, and fill in the corresponding contents. If you choose * * * to enjoy the whole drive, all directories under this drive will be shared by the network * * *. Open the Network Neighborhood icon to get a list of computers on the network. Double-click the computer you want to access and enter the drive. To map network drives, please consult the Windows Help file. If there is a problem when 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 and password of Microsoft network. Type the user name, and it 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, leave the password line blank and then "OK"; 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 access the Internet to enjoy resources.

haha. We have established a simple local area network based on Windows2 Professinal. You can also establish a local area network between your neighbors by the above methods.

First, prepare networking equipment.

Here, the author assumes that you have applied for ADSL broadband service in telecom and installed it in place. When setting up a * * * LAN, please check your ADSL Modem product description first. If you support the routing function, you can save money on buying broadband routers. On the contrary, this equipment is essential;

In addition, another essential device is the switch, which is used as a transit device for the communication between computers. What's more, each computer needs to install a network card to receive data and save the father? Hey? Resistant to feedback? Ok, that's basically all these things. And if you only have two computers, you don't have to go to so much trouble. Just install a network card in each of the two computers and connect them with a network cable.

1. Broadband router

A broadband router has two functions, one is to connect different networks, and the other is to select information transmission lines, which is the best solution for * * * to enjoy broadband connection. And with the advantages of easy to use, easy to manage and zero maintenance, it has become the first choice for Internet*** access.

Choosing a router is the same as choosing a computer. The first thing to do is to look at the hardware. Hardware is the basis of router operation, with good hardware model and high quality. The router not only has stable functions, but also can expand its functions. For example, the number of access computers, the average access router can support 1 PCs, and besides IP*** sharing and routing functions, it also has firewall, time management, DMZ and other functions; Another example is large-capacity memory and flash memory, which can provide strong processing power for routers.

At present, there are many brands of this kind of products in the market. You can ask your friends around you what brand has a good reputation in the local area. The more common ones are: D-LINK, TP-LINK, Aitai Technology, Cisco, 3Com, Huawei 3Com, etc.

2. Switches

Switches, the follow-up products of this hub, are unmatched by the former in terms of speed and functions. Its main function is to realize the interconnection of multiple computers, which is equivalent to the role of "middleman" mentioned in the article.

in today's home switch market, because the price difference of switches with different brands and different ports is very large, you should choose according to your own actual situation, such as the networking mode, price, brand, favorite switch shape, etc. In addition, you must pay attention to various performance indicators of switches, such as the number of interfaces, etc. Generally speaking, 5-port and 8-port switches are the first choice.

3. Network card, network cable

Network card is also called NIC, which means Network Interface Card. Its function is to decompose data into packets and then send them to the network. At present, the main network card on the market is PCI interface.

on the other hand, what we usually call 1M network cards, 1M network cards, 1M/1M adaptive network cards, etc. are mainly classified according to the connection rate of network cards. To sum up, the most mature choice for home use today is the 1M/1M product with PCI interface. The notebook is a network card with PCMCIA interface, which is much more expensive than the PCI network card on the ordinary PC. Generally, the PCI network card can be taken for tens of dollars, while PCMCIA usually costs 1 or 2 yuan.

in terms of network cables, there is not much attention. Generally, we choose super five twisted pairs. When you buy, the merchant will make a good connection for you according to your network type, so don't worry. The price of network cable is measured by length, which is generally 1.5 yuan/meter.

PCI network card (common desktop)

PCMCIA network card (notebook)

Third, about the connection of equipment

We have already made clear what equipment is needed to form such a network and the common sense of purchasing each equipment. So, how do you finally determine what equipment you need according to the specific situation? The following are possible situations:

1. Direct connection between two computers

That is to say, one computer is connected with ADSL Modem, and then directly connected with another computer through a network card. If this connection is adopted, it is necessary to set up Internet proxy on the computer with broadband access, such as installing proxy software such as wingate, so as to realize Internet access for both computers. This is the cheapest network.

2. Broadband router+network card+computer

This method is mainly used when there are not many computers. Because the general broadband router provides four switch ports, if you need to enjoy the plan.