How many types of backup ?

There are mainly four types of backup in windows server 2012 .

 1>Full Backup :- When we will take full backup of server all files and  folder are copies to place which       we  want to  put it is known as full backup. When some error occurred in running server then we

     put backup is known as restore. 

2>Incremental Backup:-In this backup mode we will take backup from previous backup is known as           incremental  backup.
3> Differential Backup:-In this backup mode we will take only first back after that make all changes for       second backup will  automatically running.
4>Mirror Backup:-In this backup mode when source file will deleted also its back file automatically            deleted.

Types of back up file which we will take 

Dhcp.mdb
J50.log
J50.log.sys
Tmp.cdk