1.Scripting is seperated from html
2.The coede is compiled as dll
3.All controls supports events in asp,net
4.Better scalabilitry
5.Better security that is authentication and authorization
6.Better controls
7.Better language support

Asp:---
1) asp is script based ,so that it is executed in  
interpeter.performance it is very slow.
2) it doesn,t have server controls
3) only one session mode "inproc"
4) only inpage technique is allowed
5)  validations are wriiten manually
6)  caching canot be performed 


Asp.net:----
1) asp is compliler based ,so that it is executed in  
complier.performance it is very fast.
2) it have server controls
3) session mode "inproc","ottproc","Stateserver"
4)  inpage and codebehind technique is allowed
5)  validations are present
6)  caching techinues are 3 types
      a)page output caching
      b)page fragment 
      c)data caching

ASP was Microsoft's first server-side script engine for 
dynamically-generated web pages.
ASP.NET is a web application framework developed and 
marketed by Microsoft to allow programmers to build dynamic 
web sites, web applications and web services