In 1981, the Defense Advanced Research Projects Agency (DARPA) issued the first specification the Internet Protocol (IP). It introduced a major evolution of the datagram concept: fragmentation. With fragmentation, some parts of the global network may use large packet size (typically local area networks to minimize processing overhead), while some others may impose smaller packet sizes (typically wide area networks to minimize response time). Network nodes may fragment a datagram into several smaller packets.
In 1981 the Defense Advanced Research Projects Agency (DARPA) issued the first specification the Internet Protocol (IP) It introduced a major evolution of the datagram concept fragmentation With fragmentation some parts of the global network may use large packet size (typically local area networks to minimize processing overhead) while some others may impose smaller packet sizes (typically wide area networks to minimize response time) Network nodes may fragment a datagram into several smaller packets