Answer:   ASP.NET has 3 kinds of caching :
1. Output Caching,
2. Fragment Caching,
3. Data Caching

Answer:   There are 3 types of caching.

1. Output Caching

When we compile our code it is first it compiled into Microsoft Intermediate Language (MSIL) then The MSIL is converted into Native Code using the JIT Compiler. Now if there is a page that changes frequently then the JIT needs to compile it every time. So, rather than generate a page on each request we can cache the page using Page Output Caching so that it can be accessed from the cache itself.

2. Data Caching

Data Caching is basically used for reducing database contention and round-trips, in other words by using Data Caching we store required data in a cache so the Web Server does not send a request to the database for every request so that the database performance will also increased. The data cached is a Full-Featured Cache Engine that enables you to store and retrieve data between multiple HTTP requests and multiple sessions within the same application.

3. Fragment Caching

Caching of the entire page is not good because some part of the page is common for the entire application. So Fragmentation Catching is used for some portion of the page to be cached and we can do Fragmentation Caching using a User Control.