what is osi model in computer networks

in the day-to-day work, the use of shortcuts can improve the speed of our work, so we will remember some shortcuts for easy to use. Many people in the editing text, want to use the full selection of shortcut keys, but do not know which keys to press the keyboard, then the computer text Select shortcut key is what ? 1, the full selection of shortcut keys

Win8.1 System computer Desktop sound icon is missing what to do? 1, in the Win8.1 traditional desktop, click on the taskbar in the lower right corner of the small triangle icon (Show hidden icon), and then click the "Custom" option; 2, open the Notification Area icon window, the "volume" set to "Display icon and notice", click "OK" to display the volume

1. Operation and Maintenance responsibilities• Data cannot be lost• The website is running in the hour• Better User ExperienceWhat's the difference between 2.buffer and cache?Buffeer buffer data is written to memory in the buffer area write buffer ' write cache 'Cache buffer reads read cache from cache in memory Engine room to prevent server power offA. Dual power supply AB road (using different Trans

What are the solutions to the hard drive problems? 1, the hard drive finishing, in defragmenting the hard disk, remember to close all other applications, including screen saver, it is best to set the size of virtual memory to a fixed value. Do not read and write to the hard disk, once the collation found that the hard disk files have changed, it will restart the collation. 2, defragment the ha

Do you have a lot of friends who are still using DVD optical drive? The previous XP system made the DVD fluent and not a big problem to use, but after upgrading to ghost Win7, Many friends have found the following strange problem: Windows cannot verify the data signature of this device ... Middle slightly (Code52). Win7 system does not recognize DVD optical drive, a large exclamation point so many friends at a loss, in the end what

Computer Desktop Input method is gone? General novice in the face of such problems, will not hesitate to choose to restart, but after the restart still can not solve the problem, what is the problem? What is the reason for the des

The computer in the middle of the night automatically sounds strange, but there are netizens have encountered this situation, win7/win10 computer or laptop in the middle of the night automatically is not very scary. In fact, no fuss, this is just a set of computer system cau

The mouse is not sensitive what is going on? The mouse is a very common computer input device that can position cursors on the current screen and manipulate the screen elements of the cursor's location by pressing the key and the wheel device. "Mouse" standard salutation s

Safety and security experts help you divide the reason why the internet slows down The reason for this is that your broadband line is aging, or it is damaging (router) Reason two, if the computer and other computers share a network cable, it may be your computer by the ARP

Computer memory Damage This situation is the vast number of Win7 systems and XP system users have occurred, and the memory is broken, what happened to the computer system? I believe that this is not very clear, memory problems, th

A lot of small partners are reflected, the USB stick inserted into the computer, the drive letter does not display, what to do? Today, let the small part to share with you the USB stick inserted into the computer drive letter does not show the solution. 1. Right-click on the computer---management---Disk Management, fi

What is safe mode? The so-called Safe mode is: A special mode of Windows operating system, often use the computer's friends will not feel strange, in Safe mode users can easily repair some of the system errors, play a multiplier effect. Safe Mode works by starting the computer without loading a third-party device driv