What is needed to study the discipline "computer systems, networks and telecommunications"?

Question

IT education

Advise, please, where it is possible to find distinctly stated information on a subject "computer systems, networks and telecommunications"? This subject has recently begun and simple, understandable explanations are needed, which is called "on the fingers." And also for this subject you need to write programs for the command line (I have Windows OS). The tutorial is just a list of commands and common phrases. And that's it. And why so, what principle - is not explained.

Answer 1

Networks for the little ones

Answer 2

Here are the best webinar lessons I have seen there, everything from A to Z
https://www.youtube.com/watch?v=i1GGtXce-QQ
https://www.youtube.com/watch?v=tMc84pxtQog
https: //www.youtube.com/watch?v=RdKSsK9-UrU
https://www.youtube.com/watch?v=0y2W7TP8_dI
https://www.youtube.com/watch?v=2qQ4Z-0egKU
https:/ /www.youtube.com/watch?v=yJoGZ_1G9WM
https://www.youtube.com/watch?v=nP8EcyMk5uA
https://www.youtube.com/watch?v=-mf0uy8_5uM
https://www.youtube .com/watch?v=h_yEOwAKHjI
https://www.youtube.com/watch?v=zVtiooM_QhU
https://www.youtube.com/watch?v=3uhkl0JpBZM
https://www.youtube.com/watch? v=49ifz11I4bE
https://www.youtube.com/watch?v=Iv7v00Bwxw4
https://www.youtube.com/watch?v=-mf0uy8_5uM
https://www.youtube.com/watch?v=h_yEOwAKHjI
https://www.youtube.com/watch?v=zVtiooM_QhU
https:// www.youtube.com/watch?v=3uhkl0JpBZM
https://www.youtube.com/watch?v=49ifz11I4bE
https://www.youtube.com/watch?v=TmV0kq7PL-s
https://www.youtube .com/watch?v=iDvOdvCW5Oc
https://www.youtube.com/watch?v=j--xP6iLeHQ
https://www.youtube.com/watch?v=Ufilhiu1xJE
https://www.youtube.com /watch?v=wun1eiYYh-8
https://www.youtube.com/watch?v=1AHKLKptuH4
https://www.youtube.com/watch?v=hBhXAFXo8Pw
https://www.youtube.com/watch? v=KkeO-xO3_dQ
https://www.youtube.com/watch?v=OkipCYwLQvg
https://www.youtube.com/watch?v=Ufilhiu1xJE
https://www.youtube.com/watch?v=OkipCYwLQvg
https://www.youtube.com/watch?v=XURtqXeiBOI
https://www.youtube.com/watch?v=5hypCtRkjag
https://www .youtube.com/watch?v=Ehg4t5W1xso
https://www.youtube.com/watch?v=dlasiRz0avo
https://www.youtube.com/watch?v=uZJ8WVdw-Ck
https://www.youtube. com/watch?v=xCEiYBmEh38
https://www.youtube.com/watch?v=e50Xcxeol4E
https://www.youtube.com/watch?v=GZTqZQVSY1A
https://www.youtube.com/watch?v =xgWWqdKNaEI
https://www.youtube.com/watch?v=B-dlhkWBNuA