An optical mouse works in a completely different way. It shines a bright light down onto your desk from an LED (light-emitting diode) mounted on the bottom of the mouse. The light bounces straight back up off the desk into a photocell (photoelectric cell), also mounted under the mouse, a short distance from the LED
A Hub is a networking device that allows you to connect multiple PCs to a single network, whereas a Switch connects various devices together on a single computer network. A Hub operates on the physical layer, whereas Switch operates on the data link layer
●Windows key+R:Opens the run menu🍀
●Windows key+E:Opens explorer🍀
●Windows key+Up arrow:Maximize current window🍀
●Windows key+F:Opens search for files and folders🍀
●Windows+Break:Opens systems properties🍀
●Alt+Tab:Switch between open programs🍀
●Ctrl+Shift+Esc:Open task manager🍀
برای افزایش و بهبود عملکرد کامپیوتر استفاده میشود.با کارت شبکه یک دستگاه میتواند با دستگاههای دیگر در یک شبکه قرار گیرد.با وجود کارت شبکه دستگاه میتواند به شبکه مرکزی وصل شود و یا فقط به طور مستقیم به دستگاههای دیگر متصل شود.
For the first time saving save is the same as save as but when you edit for the second time they change
Save:it just update the old file to a new one
Save As:it keeps the old file and creates new file besides it