I'm reading Comer's TCP/IP book, where (page 107 of the 4th edition, if you're interested) he states: quote:"The IP checksum is formed by treating the header as a sequence of 16-bit integers (in ...

Breaking an IP datagram (packet) into pieces in order to be sent across a transmission link with a frame size smaller than the datagram. Performed in a router, the header of the original IP packet ...