Big Endian vs Little Endian

Data stores in memory split in Bytes

Endianness:Order of bytes (of data) in memory

Big Endian stores Most significant byte First
Little Endian stores Least significant Byte First

Network: Big Endian
PCM: Little Endian
X86: Little Endian
Src:http://www.raywenderlich.com/12910/how-to-make-a-simple-playing-card-game-with-multiplayer-and-bluetooth-part-3/big-endian-vs-little-endian