Master boot Record

what is Master boot record
MBR is first sector of a data storage device such as HD. It stores information about logical Partition like C:, D: (max 4)
- File type
-Store/end (CHS Format)
-Offset
-Partition Size
-Weather partition is boot-able or not 
- Works with Max 2 TB Drives

Boot Loader - Small bit of code which is used to store boot information.