A LAN, abbreviated from Local Area Network, is a network that covers a small geographical area such as homes, offices, and groups of buildings. Whereas a WAN, abbreviated from Wide Area Network, is a network that covers larger geographical areas that can span the globe.
A Wide Area Network (WAN) operates over a much larger area, as they interconnect LANs to allow them to exchange data.
Answer:
He meant that you a USB drive in case your computer broke
...something that the user knows.
Answer:
To capture the contents of the currently active window, press Alt-PrtScrn (or Alt-Print Screen ). To capture the contents of the entire screen, press PrtScrn (or Print Screen ) by itself.
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