Three ways to control your LAN speed

How can we have a satisfactory LAN speed? Believe that every enterprise is always in contact with the local area network, fast and stable LAN access speed can improve office efficiency, this is the requirements of each enterprise. But most of the time is not the wish, sometimes the local network can not access or very slow speed. In fact, we just find out the reason for the slow local area network, and make some changes and settings, LAN speed will be achieved greatly speed.

　　Pull out local network speed slow behind the Black Hand

Breaking the network may be easier to troubleshoot, but the network is a pass, slow to solve the problem may be a bit of trouble. The main reasons for the slow LAN network speed are as follows:

The broadcast storm slowed the speed of the Internet. All devices on the same network are in the same broadcast domain, and all broadcast information is advertised on each port of the network, and only one broadcast message can be transmitted across the network at the same time. The number of computers in the network is increasing, the number of broadcast packets will also increase dramatically, broadcast time will be more and more, when the broadcast packet to a certain extent will affect the normal information transmission on the network, resulting in a significant decline in the transmission efficiency of the network, and even network paralysis. In addition, some popular network virus and hacker software attack also can cause broadcast storm.

Network equipment and equipment failure caused slow speed. If the computer's network card or other network device is physically damaged, the damaged network card will continue to send a large number of packets to the switch, which many packets are invalid, a large number of useless packets will cause information transmission delay, causing network congestion, resulting in broadcast storms, resulting in slow LAN speed. This can be replaced by the failure of network equipment, where the network card, hub and switch are the most likely devices.

It should be noted that the network cable can also cause slow speed. Many companies in the networking time, did not deliberately consider the quality of the network cable, think good or bad, speed is no difference. However, in the 100M network, the net cable and some famous brand cable will have significantly different transmission speed. Crystal Head of the production is also fastidious, many friends think as long as the line at the end of the crystal head of the same order on the line, this recognition is wrong. Twisted-pair wires are tightly and reasonably intertwined by 4 pairs of wires. According to T586A, t586b Standard made crystal Head, can maximize the avoidance of crosstalk, to ensure fast and stable data transmission. If you do not follow this standard production, may start to use the normal time, after a period of time will be slow speed.

The network loop causes slow speed. In connection with the comparison of replicated LAN network, some network management may use the standby line, while careless but the standby line as a main line connection, so inadvertently caused by the network loop. In the network loop, the packet will continuously send and verify the data, which will seriously affect the overall network speed. In the network, the network cable affixed to the label can reduce the occurrence of this fault, while labeling to troubleshoot the problem is also helpful. This type of failure can be used to isolate the problem in a step-by-step method of partitioning.

The virus affects slow internet speeds. Today, the negative impact of viruses on the web cannot be underestimated. Due to improper defense, some computers inside the local area network will infect the virus, some worms will continue to send viruses to other computers in the local area network, and some viruses can randomly select the documents in the computer attached to the Address book to send e-mail addresses, thousands of spam messages queued to send out, Some emails are blocked and then returned to the heap on the server, resulting in a significant network congestion, rapid slow. This can strengthen network security by patching, closing ports, and updating anti-virus software in time.

In addition, some devices in the network port bottlenecks can also cause slow speed, this can be installed through multiple network cards, divide multiple VLANs, change the router configuration to increase network bandwidth, effectively alleviate network bottlenecks, improve data transmission speed. If your business is using a wireless LAN, then the location of the wireless router improperly placed, will cause weak signals, thus affecting the LAN network speed slowed.

　　LAN speed Trick

Find out what caused the LAN network to slow down after the failure, we can prescribe the right medicine. The previous article has briefly introduced the basic method of troubleshooting, using these methods to eliminate the failure can speed up the network speed of the LAN. In addition, there are some techniques to speed up the LAN speed.

Let the NIC work at full speed. Right-click the My Computer icon, turn on the properties → hardware → Device Manager option, click the Network Adapters option, select the appropriate network adapter, double-click the "Advanced" tab in the Open window, and select "Linkspeed/duplexmode" (Connection speed/ Duplex mode) This item, by default is "AutoMode (Automatic Mode)", in the Drop-down list box, select "100FullMode" (full power mode), so you can transfer the network card to full speed

Disconnect the unused network drive. The use of mapped network drives can speed up the LAN's folder access speed, but if you map the network drive, the future is not used, be sure to disconnect it, because each time the system will automatically map this disk, Occupy more system resources, so that the local area network access speed slows down. The Disconnect method is:

Open Explorer, click tools → disconnect network drive, and then cancel the appropriate drive in the open window. You can also right-click the My Computer icon on the desktop and choose Disconnect Network Drive.

Direct access accelerates access to network Places. If you know the name of a computer or a fixed IP address that you need to access in your local area network, you can enter the same computer as the shared folder you need to access in the explorer's address bar or the network path for quick access. For example, if you enter the server company system, you can quickly enter the corporate systems shared folder named "Server" computer to view the contents. Alternatively, you can open "Start → run" and enter "192.168.0.11 company system" in the window to quickly access the shared folder, as shown in Figure 3, where "192.168.0.11" is the fixed IP address of the computer where the shared folder resides on the LAN, and through "Network Neighborhood" Open one layer at a-level.

Close unrelated options. In the Windows XP operating system, open Folder options in Control Panel, click the View tab, and the "Automatically search for network folders and printers" option at the bottom of the Advanced Settings window, as shown in Figure 4, is selected by default, but you can turn it off. Because this option allows the system to automatically search for network folders and printers when it is powered on, slowing startup speed, and this option may also allow your confidential files to be printed to other parts of the printer. After closing, you can select a network printer in the Print option when printing. When you access a local area network computer through My Network Places, the system will not automatically find shared folders, which also improves the speed of your LAN access.

　Wireless LAN Acceleration Trick

If your company is using a wireless LAN, you can use the following methods to improve the network speed of the LAN:

Eliminate interference and remove occlusion. If there is a mask between wireless devices, in particular, some metal shielding, which will seriously affect the transmission of wireless signals, so be sure to remove these shielding, wireless ap/routers can be placed in a higher position in the room, preferably in the middle of the room, so that all the company's network card can be better connected. In addition, the company's cordless phones, microwave ovens and other electrical equipment to the wireless transmission signal has a lot of interference. Some microwave ovens use the 2.4GHz band on the 7th to 11th channel, for the use of IEEE802.11B protocol wireless devices, can be set to other channels of communication channel can be. Of course, they can also keep the electrical equipment away from the wireless devices and move them home.

Tip: You can also use the gain antenna to enhance the region's signal radiation intensity, but must choose famous brand manufacturers of products, some of the products do not play a real role, in the form of a dummy.

In addition, you can turn on 54Mbps mode. Some wireless ap/routers to "compatible" with more wireless network cards, does not turn on its G mode, we can set "wireless mode" to Gmode (g mode), the "Transfer (TX) rate" set to 54Mbps, activate 8X mode, and "Antenna transmission power" set to the highest, In order to speed up the transmission of the wireless network. The general login address for the wireless ap/router is http://192.168.0.1 or http://192.168.1.1.

Tip: Open 54Mbps mode, some PCMCIA slot wireless network card may not be connected to the wireless ap/router, then change back to Mixedmode (mixed mode).

Finally, also want to see whether the wireless network card to open the energy-saving mode, if turned on, please turn off this function, because in the energy-saving mode, the transmission power of the wireless network card will be reduced, resulting in the weakening of wireless signal. It is best to use a wireless device's own management program to manage the device, which allows you to set more options, while Windows XP wireless management is somewhat "thin".

With these methods described above, I believe your LAN speed will be greatly improved. Of course, there are other ways to improve LAN speed, which needs to be constantly explored in practice.