Crack several famous Windows super rumors (2)

Temptation index: 8 risk index: 4

After installing Windows XP Professional, run Gpedit.msc, open Windows XP group policy, Then find the "Computer Configuration → Administrative Templates → Network → QoS Packet Scheduler" item, modify it to 0%, this will remove the 20% of the network bandwidth reserved by Windows XP. This "skill" may be the most widely spread rumor since the advent of Windows XP.

But the problem is really as mentioned above, has Windows XP kept 20% of the bandwidth? The answer is no, the reserved bandwidth is used for a new technology introduced in Windows 2000 - QoS (ie: networked service quality), and, not to say that 20% of the bandwidth will be occupied, in fact This 20% bandwidth is only used when the application that uses the QoS application Programming
interface needs to access the network. If these applications that use the QoS API do not have access to the network, the reserved bandwidth can still be used by other applications.

Microsoft specifically addresses this issue in a knowledge base codenamed KB 316666 ( http://support.microsoft.com/?id=316666
). The modified value in the group policy refers to the maximum amount of bandwidth that can be used when the QoS API writer needs to access the network. If we set it to 0%, it means that the application written by the QoS API has to be combined with other The application competes for limited bandwidth, with the potential that data that requires priority communication is not prioritized. Of course, QOS, a new technology that was originally used to improve network quality, has lost its meaning.

谣言四: Change a parameter, add a software, the startup speed will be faster

Temptation index: 6 Risk index: 2

We can often see the so-called Optimize Boot.ini to speed up Windows boot speed: Change Fastdeect at the end of each boot entry to Nodetect. Literally, the quick detection of the startup is changed to no detection, but the biggest problem is that there is no Nodetect parameter in the parameter list in Boot.ini. In the technical information released by Microsoft, from Windows NT to the latest Windows Server. 2003, Nodetect this parameter does not exist, using this fabricated parameter, there may not be a problem, but whether it can speed up the startup speed is still an unknown.

For the Fastdeect parameter, Microsoft gave a detailed explanation: Turn off Ntdetect.com to detect the serial mouse at startup.

But in order to speed up the system startup speed, some people are still infatuated. Coincidentally, Microsoft released a program called Bootvis.exe, and there is a menu under the menu that has an "Optimiae System" option, so there is an optimized startup technique: use Bootvis.exe to speed up Windows XP Startup speed. In fact, Bootvis.exe is a visual performance tracking tool provided by Microsoft to system designers and software developers. Developers can use this tool to track problems that occur during system startup or wake-up. Unfortunately, the tool was used in very inappropriate situations.

Microsoft also mentioned at http://www.microsoft.com/whdc/hwdev...ot/bootvis.mspx
that Bootvis.exe cannot change the startup of the system or Wake up performance.

After the compilation: Because of the limited space, we can't clarify all the "rumors" one by one. But from the above examples, it can be seen that the current rumors are almost hidden in seemingly correct operations or theories, or they are hearsay, and ignore the deeper meaning. Now, what we need to do is to get as deep as possible to understand the purpose of a certain technology. It's not difficult to understand. Look at the help that comes with the system. For users with a slightly higher level, you can use the various materials provided by the manufacturer to obtain detailed information.

It’s not terrible to encounter rumors, but the horrible thing is that you can’t identify rumors. Therefore, we hope that all readers can acquire more knowledge here to avoid more serious problems caused by misunderstanding.