IP Packet Fragmentation Tutorial

&EEEJ2@LHJE2åå;H.2*L2@L+åFL726/.:F;:s.FFJ::&L2&@LJ@L@L.FEL;å.E*;2*++Ft7L6/;:*E+;s.L*22+FJ7E6Ã/L:@LLE2t&;s.*22*++.FJ2H&L:IP Packet Fragmentation Tutorial Dr. E. Garcia, admin@miislita.com Published: November 16, 2009. Last Update: November 16, 2009. http://www.miislita.com/ Abstract–This tutorial covers IP fragmentation, data payloads, IP packet and header lengths, maximum transmission unit (MTU), and fragmentation offset (FO). Expressions describing these concepts are systematically derived and explained. Keywords: IP fragmentation, data payloads, IP packet, IP headers, maximum transmission unit, MTU, fragmentation offset, FO 1 Data Payloads The data payload (DP) of an IP packet (IP datagram) is defined as the packet length (PL) minus the length of its IP header (IPHL), (Eq 1) 16Per RFCs 791 and 829, the largest packet allowed by TCP/IP standards is 65,535 (i.e., 2 – 1) octets, the minimum IPHL is 20 octets, and the maximum IPHL is 60 octets. An octet is a group of 8 elements. In computer sciences, an octet is a group of 8 bits called a byte. Octet is also the French word for byte. Thus, the largest data payload of an IP packet ...