difference between differenct types of servers...

We are thinking of hosting our own web page... I realize that there are different types of servers...
right now we are all connected to a router which gives us internet; and we share folders if we wish to since everyone has xp or vista;
We use a hosting account for our email and our web page, we want to create some forms ( i use php) in order to set up inspections on the road ect... (we just bought some htc moguls)...
So in order to give ourselves flexibility we want to have our own server which we could host our own information...; web page; forms for employees; portals for customers.
I have used feebsd as a desktop system and pretty much done everything in terms of connecting to the internet; setting up kde; mysql, etc... I am a bit confused about connecting to a static address and how the dns references that address although its easy enough on our current hosting account.
So as a small business can one web server service all our needs or do I have to think about breaking up tasks for different servers...
solunatecAsked:
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TeRReFCommented:
One server is more than enough.
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solunatecAuthor Commented:
What is the purpose of multiple servers? What are their functions...
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