The reason analysis of the slow speed of computer internet

As a professional network administrator not only to ensure the stability of the network, but also to ensure a normal network speed. At this point, I would like to analyze the causes of the slow speed of computer surfing: One is the user's computer, the other is the network environment.

First, the user computer aspect

1. Computer Configuration

The higher the machine configuration, the smoother the Internet will be. Memory size, CPU frequency, hard disk speed and network card speed are the main reasons that affect the speed of the Internet. Upgrade the machine configuration as much as possible, so that you can guarantee the need for the Internet on the hardware.

2. Setting up the browser

⑴ reduce the add-in. Open IE Browser: Tools-"Manage Add-ins, add-ins are programs that extend browser functionality, disable add-ons, and speed up browser loading

⑵ Set the browser home page to be blank. The browser will not automatically load any pages at startup

⑶ Cancel multimedia options. Open Browser: Tools-Internet Options-advanced-Multimedia, remove some unnecessary options, such as: Play the animation in the Web page, play the Voice in the Web page, etc.

⑷ closes the Java script. Java and Java scripts are subroutines that run dynamically, and are generally used to animate and rotate text. However, the operation of these programs will greatly affect the download speed. IE browser, tools-Internet Options-security, in custom level, close the appropriate options.

3. Check for "process" loaded at startup

In the "Start-" run, type MSCONFIG, the "System Configuration Utility Window" appears, click on the Startup items, these are user-installed utilities, such as MSN, anti-virus software. Some programs do not need to start on the boot, in the front of these programs do not tick, so that the boot loading process is much less, the resources vacated, in order to improve the speed of the purpose.

4. Check the Open service

After Windows XP is installed, many services are typically started by default, some of which are not available to ordinary users, consume system resources, and may be exploited by hackers. In the run, type services.msc, open the service window, according to the actual needs of users, you can prohibit a lot of services to the general network users, it is recommended to prohibit the following services:

⑴application Layer Gateway Service If you do not use ICS and ICF software, you can turn off

⑵clipbook (scrapbooks) share information in a scrapbook with other computers, which are generally not used

⑶computer Browser (Computer Browser) maintains an updated list of computers on the network

⑷fast User Switching compatibility provides management for applications that require assistance under multiple users

⑸messenger Messenger Service

⑹ms Software Shadow Copy provider disk area Shadow Copy Service

⑺net logon General PC is unlikely to be used in the login domain to review this service

⑻network DDE (Network dde)

⑼netmeeting remote Desktop sharing Desktop Connection

⑽nt LM Secure Support Provider (NTLM Security Support Provider)

⑾performance Logs and Alerts, to prevent the search of data by remote computers, resolutely prohibits it

⑿remote Desktop Help Session Manager manages and controls Remote Assistance

⒀remote Procedure Call (RPC) Locator Remote procedure Invoke locator

⒁remote registry enables remote users to modify registry settings on this computer

⒂routing with remote access (Routing and Remote Access) to provide dial-up online to the zone network or VPN service

⒃terminal Services allows multiple users to connect and control a single machine

⒄telnet allows remote users to log on to this computer and run programs

⒅TCP/IP NetBIOS Helper for users who do not require file and print sharing, this can also be disabled

⒆portable Media serial number to regain any music dial numbers through the online computer

⒇qos R SVP (QoS Admission Control, RSVP)

In addition to these 20 services, server (servers) can be banned without file and print sharing.

5. Adjust your computer's performance options

Right click on "My Computer", point "properties", point "advanced" options, Performance-"Set-" visual effects, select "Adjust for best performance".

6. Check trojans and viruses, clean up files

Check for Trojans with Windows Cleanup Assistant or 360 guards, or open Task Manager to see if there are any unfamiliar processes. Scan your computer with the latest antivirus software. Clean up temporary files, defragment disks, and check virtual memory size.

Second, the network environment

1. Is it clear that it is slow to visit a Web site, or is it slow to visit all sites? If you are only slow to visit a website, you should determine if the Web server is low on bandwidth or too heavy load.

2. Is it related to the time period? Generally afternoon and evening, relative to the morning, the speed is slower, because the Internet users more, occupy more bandwidth. If it doesn't matter with the time period, there is another reason.

3. Check the network card and network cable. The network card is not loose, plug and pull back after look. Check the other end of the network cable, is the connection to the port loose? is the network cable in accordance with T 586A, t586b Standard production? Try The Wire.

4. Check if there is a broadcast storm on the network. Use the network management software (such as sniffer) or net monitor, to see which machines in the network traffic is large, which machine data flow anomaly. Find this machine, unplug the network cable and restore normal.

5. Determine if there is an extranet network attack? In addition to the intranet broadcast storm, attacks from the extranet are also an important aspect of bandwidth impact. Using network management software, can determine whether the network is affected by the broadcast storm, or from the external attack.

6. Is there a network hardware failure? A variety of network equipment (including network cards, hubs, switches, etc.), if the work is not normal, will trigger a large number of broadcast packets, when the number of broadcast packets reached 30%, the network transmission efficiency will be significantly reduced. Use network management software to check each hardware device.

7. Whether there is a loop in the network. In a larger network, often appear loops (loops), such as in the student dormitory or office, such as public places, wiring is more cluttered situation, easy to appear loop, at this time, the computer sent every frame of information in the network channel repeatedly broadcast, resulting in broadcast storm phenomenon, resulting in the LAN bandwidth is depleted, The occurrence of intermittent and intermittent phenomenon. By grasping the packet, you will find a large number of IP flags duplicate broadcast packets exist. These large numbers of broadcast messages should not normally be initiated by a single host, but by the switch

Repeated forwarding caused. The solution is typically a port-by-case approach until a network cable is unplugged, and the networks are back to normal.

8. Worm virus or ARP virus

The range of virus hazards is different. Some viruses (Panda burning incense, disk drive virus, etc.) can cause the computer to not work. Another type of virus will send out many packets, greatly affecting the network, such as Worms, ARP virus.

As a network management, the need to frequently login gateway switches, to view the log or ARP table, if there is a Mac in the ARP table for multiple IP situation, then indicate the existence of ARP spoofing attacks, and this Mac is to deceive the host Mac. The computer is disconnected from the network in time to reduce the impact on the whole network. To the poisoning of the computer recommended reload system, and immediately install patches, anti-virus software, 360 security guards and other tools.

Now a variety of viruses continue to appear variants, seriously affecting our work and learning, so we want to improve the virus prevention awareness, preventive measures, do: Timely upgrade the use of anti-virus software, timely installation of system patches, while unloading unnecessary services, not only improve the security of the system, but also improve the speed of the Internet.