Thank you for your reply the above information is good for me.
But I need the Advantages & Disadvantages between follwoing condition.
1) Application Tier contains SSRS and Build Services( and Agents and Controler) .
2) Performance Issue for the above deployment if we have big numbers of team projects.
3)Impact of above deployment when near about 1000 users access TFS at a time .
It is very important to me to Plan for Hardware, if performance and network Issue will occured or any disaster due to network traffic.