computer & internet

i don't know what the cluster is all about.this is related to networking of computer .........

Also called an "allocation unit" or "file allocation unit," it is some number of disk sectors that are treated as a unit. A cluster is the smallest unit of storage the operating system's file system can manage. That means if a 1KB file is stored in a system with a 32KB cluster, the 1KB file takes up 32KB of disk space. More info here: http://www.pcmag.com/encyclopedia_term/0,2542,t=cluster&i=39852,00.asp