What are logical cluster numbers (LCNs)?

What will be an ideal response?

ANSWER: To understand how data runs are assigned for nonresident MFT records, you should know that when a disk is created as an NTFS file structure, the OS assigns logical clusters to the entire disk partition. These assigned clusters, called logical cluster numbers (LCNs), are sequentially numbered from the beginning of the disk partition, starting with the value 0. LCNs become the addresses that allow the MFT to link to nonresident files (files outside the MFT) on the disk’s partition.