Before Discuss about Server Operating System we have to know_ _ _ 

What is Operating System?

An operating System (OS) is an intermediary between users & computer hardware. It 

provides users an environment in which a user can execute programs conveniently 

and efficiently. 

Types of MS Windows operating system:

1. Client OS --- win_XP, win_7/8/8.1/10

2. Server OS --- win_2000/2003/2008/2012

What is Server OS?

A server operating system also called server OS, is an operating system specifically 

designed to run on servers, which are specialized computers that operate within a 

client / server architecture to serve the requests of client computer on the network.

Minimum System Requirements for Windows Server 2012 R2

A lot of people who uses facebook does not know how to download video from facebook. Sometimes we watch our most popular video on facebook then we want to download video on our own device. But It is great and re-great that we don't know how to download. 

Today I show you how can you do it. Very simple just complete 3 steps. The best and easy way describe below: 

First Step:

At first select your best video which you like best on facebook then play the video and press the right button of your muse and click on show video url then copy this video url.

Second Step:

Take a new Tab and past the video url. Before enter you have to cut "www" from video url and write down here "m" then press enter.

Example: 

Video url: https://www.facebook.com/tarashupazila/videos/1599548143665890/

For Download : https://m.facebook.com/tarashupazila/videos/1599548143665890/ 

Third Step:

In the last step you have to again play the video which is shown from new link that means htttps://m.facebook.com/......................... then press the right button of your muse and click "Save video as" then select a download location on your computer. 

Wait & See it takes few minutes to download. 

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