How to set a laptop or mobile phone as a hotspot? How to set a multimedia streaming server? What are the typical attacks of a computer network? What hardware and software are used to anti-attacks?...

How to set a laptop or mobile phone as a hotspot?

How to set a multimedia streaming server?

What are the typical attacks of a computer network? What hardware

and software are used to anti-attacks? What is VPN? Can you give an example?