一份完整的行业门户网站策划开发设计营运方案（A complete industry portal planning, development, design, operation plan）

1、一份完整的行业门户网站策划开发设计营运方案（A complete industry portal planning, development, design, operation plan）DateandtimeThe reason is that you use a lot of JavaScript effects.For example, the special effects of the mouse, the special effects of the columns on the page, the special effects of the status bar, and s

2、o on. The special effects are first downloaded to your local machine by the server and then run on your local machine, and then you can see it. Special effects do more, will run most of the day can be completed in your local machine, and if your machine configuration in general, then more slowly, ev

3、en if all the effects are completed, your page will be also very uncomfortable.JavaScript is also more than the slow speed, and the important thing is that most people use it do not know how it is written, just copied from other station by the way, in the process of circulation, there will be a lost

4、 part of the code, the results you copied may be wrong or incomplete the code that will lead you to the website; and if there is a practical joke people disguised as malicious code specific code to you, and you dont understand, copy to the site, then not only when you open your site will suffer, don

5、t open your web site is also very likely to become victims.Therefore, it is necessary to reduce the use of JavaScript special effects (three kinds of special effects within), otherwise it will certainly be harmful to your website. If you want to use it to choose the specific code relatively safe, to

6、 better site to copy, not to the mixed station.Reason two. You have used large, untreated pictures on the page.Pictures can be processed to reduce the number of bytes, otherwise, many pictures will take up a lot of space at the beginning, and make the site open slowly. Photoshop, fireworks and other

7、 graphics software can be used to reduce the picture size.Reason three. You have flash or video files on your page.Many netizens like to do flash animation, songs, or live TV, live movies and so on on their home page. In fact, this will slow your page down considerably. Flash can be downloaded while

8、 playing, but often due to network reasons, can not be downloaded successfully, the results of your page will have been waiting to download the state, and can not be successfully completed. Movies and TV shows are worse. They usually have to be buffered and downloaded a little bit before they can be

9、 played. If the network isnt good, it cant be downloaded and played. So I suggest you use less flash and less live TV (preferably not).Four, citing other web content too muchIn fact, this includes references to other web sites, images, videos, and so on, but it also includes everything you quote fro

10、m other websites. If you are quoting something from another web site directly, and the site is slow, or the site is no longer there, you will be slow to open it.Reason five. You point to some domain names you have applied elsewhere to point to your websiteIn general, if the top-level domain point di

11、rectly to the point, it will not have much impact on speed. However, there are a number of domain names that are free of charge in other places. The speed is very slow, and after several turns, the speed is slower.Cause six, you might have the wrong code on your station. Find the wrong code and corr

12、ect it!Reason seven, the system has virus, especially helminth kind virus, serious consumption system resource, cannot open page, or even crash.The distribution of worm viruses through E-mail is becoming more and more serious and harmful to the network speed. This virus has infected users as long as

13、 the Internet did not stop to send mail, random address selection of random virus document user personal computer attached to the user machine address book on the mail. Hundreds of these spam messages are queued to send out, and some are returned to the server in batches. Cause individual backbone I

14、nternet to appear apparent jam, network speed is apparent slow, make LAN is close to paralysis. Therefore, we must promptly upgrade anti-virus software; computer to timely upgrade, install system patches, and uninstall unnecessary services, shut down unnecessary ports, in order to improve the safety

15、 and reliability of the system.Reason eight, itself server bandwidth is insufficient, speed is slow.The reason nine, itself server bandwidth is enough, give you limit too dead, slow.Reason ten, user and website are in different network segment, telecommunication, network, mobile, China Railway these

16、 lines cause slow speed. For example, your server is in Telecom, and you visit by netcom.Reason eleven, your database is very big, cannot bear.The reason twelve, are all some rogue plug-ins.Thirteen reasons, the network firewall settings do not allow multi-threaded access, such as the current WinXPS

17、P2 default on this limit, the use of multi-threaded download tool has been greatly limited, BT, thunder are so. As a result, opening too many pages at the same time can cause slow Web pages.The reason fourteen, local network speed is too slow, too many computers share the Internet, or share the Inte

18、rnet users, there are a large number of downloads, there will be open web pages slow problem.The reason fifteen, the browser has BUG, such as multi window browser some test version will also appear to open web pages slow problem.Sixteen reasons, the access site is too heavy, the bandwidth is too nar

19、row, and the program design is not reasonable, there will be a problem of slow Web page opening.Seventeen reasons, network intermediate equipment problems, line aging, virtual connection, router failure, etc.The reason eighteen, and whether the system vulnerabilities, it is difficult to say, and oth

20、er viruses such as shock wave is spread through the vulnerability, and lead to slow or even paralysis of the system.Nineteen reasons, network problems lead to slow networkWe know that twisted pairs are tightly twisted together by four pairs of wires in strict accordance with the rules to reduce cros

21、stalk and background noise. At the same time, using only a pair of 1, 2 and 3, 6 and four lines, in the T568A standard and T568B standard in the 1, 2, 3, 6 for sending, receiving, and for 1, 2 must be from a pair of winding, 3 and 6 must be from a pair of winding. Only in this way can the crosstalk

22、be avoided maximally and the data transmission is guaranteed. In practice, I find that there is a great deal of hidden danger in the network cable which is not produced according to the correct standard (T586A, T586B). The performance is: one situation is that the network speed is slow when it is fi

23、rst used; the other is to start the network at normal speed, but after a period of time, the network speed is slow. The latter situation is very obvious on a desktop computer, but the speed is normal when checked by a laptop computer. For this problem, I have many years of practice found that the ne

24、twork speed caused by the failure to produce the correct standards is related to the quality of the network card. General computer card performance as the notebook computer, therefore, in troubleshooting exchange method, using a notebook computer does not rule out the detection speed of normal cable

25、 does not make this problem according to the existence of standard. We are now required to press T586A, T586B standards to suppress the network, in the detection of failures can not all use notebook computers instead of desktop computers.Twenty reasons, there is loop in the network, resulting in slo

26、w network speedWhen the number of nodes involved in the network is not many and the structure is not very complex, this phenomenon usually occurs very rarely. In some complex networks, however, there are always redundant spare lines, such as inadvertent loops. For example, the network cable from the

27、 network center received a computer room, and then from the computer room two computer room. At the same time, from the network center there is a standby line directly connected to the computer room two, if these lines are connected at the same time, constitute a loop, data packets will continue to

28、send and verify data, thereby affecting the overall speed. This situation is difficult to find. In order to avoid this situation, we must lay a good habit of laying the network cable: the net mark is marked, and the spare line should be recorded. When this kind of fault is suspected, the method of z

29、oning and subsection removal is usually adopted.Reason twenty-one, network equipment hardware failure caused by broadcast storm, resulting in slow network speedAs the main means of discovering unknown devices, broadcasting plays a very important role in the network. However, as the number of compute

30、rs in the network increases, the number of broadcast packets will increase dramatically. When the number of broadcast packets reaches 30%, the transmission efficiency of the network will decrease significantly. When the network card or network equipment is damaged, the radio packets will be sent con

31、tinuously, thus leading to a broadcast storm and causing network communication to be paralyzed. Therefore, when the network device hardware failure, it will cause network speed to slow down. When suspected of such failure, we can replace the hub or switch to exclude sets of equipment failure by repl

32、acement method. If the device does not have a fault, the hub or switch off the power after the computer involved in one by one test with the Ping command DOS, find the faulty computer LAN, the replacement of the card can be restored to normal speed. Network cards, hubs, and switches are the most vul

33、nerable devices that cause network traffic to slow down.The reason twenty-two, a bottleneck in the network formed a network, resulting in slow network speedIn fact, routers, Wan ports and LAN ports, switch ports, hub ports, and server network cards can all become bottlenecks in the network. When the

34、 network speed is slow, we can use the network management software to check the data flow of routers, switches and server ports during the peak use of the network;You can also use the Netstat command to count the data traffic at each port. This confirms the bottleneck of network data flow and tries

35、to increase its bandwidth. Many specific methods, such as the replacement of the server card for 100M or 1000M, install multiple network cards, divided into multiple VLAN, change the router configuration to increase bandwidth, can effectively alleviate the network bottleneck, can maximize the speed of data transmission.Reason twenty-thre