VPN or Virtual Private Network question

[quantum]

Hey guys,

Anyone has any experience on VPN or virtual private network?

Is VPN safe?
Is VPN cheap?
What are the requirements to establish a VPN network?
What is the range of VPN?
Can you do it over the internet?
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Dust fills my eyes / Clouds roll by / and I roll with them / Centuries cry / Orders fly / and I fall again
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[Mastermind]

I covered VPN in my second year when I was doing the cisco module. Unfortunately, I can't remember much on the topic. I'll try to look at it again when I get some time.
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Keep your own dignity, both online and offline throughout your life !!!

[quantum]

I am in no hurry, but any input from you would be very much appreciated.
_________________

Dust fills my eyes / Clouds roll by / and I roll with them / Centuries cry / Orders fly / and I fall again
Afford best design, implement best solution. Outsource your web design.