optimizing and network design

hi,

i am wondering if there is some company what can optimize my servers, also i have seen some one tell me that you can have 5 servers and cluster? where 1 server mail 1 server dns 1 server dns 1 server mysql 1 server web

please let me know who can do this or example of how to do this and the pro/cons

thanks

 

 

 

 

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