[Redhat] Server query

["B, Prasada Rao (Cognizant)" <BPrasada chn cognizant com>]

Hi Rick,
Thank you verymuch for your support Rick.
I have one doubt from many days.What is Server actually? Coz Here I am sending my views on Server.
If suppose we have 10 machine and all of them connected in LAN and all machine are cotacting the external world(say Internet) 
or communicating with other machine with in the internal network through a machine (gateway). That gateway machine is called Server  Correct me If I am wrong.
    But in advertisements, companies like IBM, HP are specifying that IBM Server, IBM Desktop PC. From the advertisements I have identified the difference between them is only Configuration (Normal PC will have 128MB RAM and Server machine will have 512MB RAM). Nothing much I have Identified. Also they are saying Servers will have RAID support. cant we do RAID (Software) in Normal machines? What is the difference between the Desktop PC and Server machine? 
Because as I stated inmy previous mails, I am going to configure mail,DNS, webservers in my machines. Do I need to buy the Server machine only or Can I configure all of them in normal machine (If I have good configuration like 512MB RAM, 80GB HDD, ..etc). Please let me know in detail about Server and normal PC.


Thanks and rgds,
Prasad Rao.










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