Correct Answer : You can use the Location attribute of the < %@ OutputCache %> directive to specify where a page is cached.
Explanation :
By default, when you use Page Output Caching, a page is cached in three locations : web server, any proxy servers, and browser. You can write following code to cache the page on server for 50 seconds.
< %@ OutputCache Duration="50" VaryByParam="none" Location=”Server” %>