What are mail server and firewall and antivirus hardwares??

i heard someone who is responsible for IT in a shopping mall that he will buy 3 hardwares (and call those servers) , one for firewall and one for mail server , what are these servers exactly??? i heard about the software ones.. but never heard about the hardware, anyone get a clue?

What are mail server and firewall and antivirus hardwares??viruses

A server is basically a computer that serves information to several computers. By using 3 separate servers, this insures that if one goes down, not all services are affected. It's like using the same server for hosting a website and email. If that server goes down, your website is not accessible and you will be missing email too!

What are mail server and firewall and antivirus hardwares??antispam

those are protection to your computer you can

download them here..

http://att.my.yahoo.com/ if you have an acount there.
A server is a computer which has a specialised purpose, usually "serving" up something hence the name.

All websites are hosted on web servers which do just that.. they're computers which serve webpages.

A mail server is a server which handles email. When you check your email, that has been on a mail server before you get it.

A hardware firewall is a server/computer which has the sole job of protecting the security of a network. It works just like a software firewall, only there's a whole computer (or sometimes more) dedictated to the security.