OSI model; TCP/IP architecture; local area network (LANs); subnetting; routing wide area networks (WANs); Internet protocol (IP); networking and internetworking devices; Internet control message protocol (ICMP); user diagram protocol (UDP); transmission control protocol (TCP); routing concepts; vector distance routing - RIP; link state routing - OSPF; path vector routing - IDRP; real time transmission; application layer part 1; application layer part 2; application layer part 3; firewall; appendices - ASCII and EBCDIC codes, TCP/IP version 4, RFC, networking concepts, error detection and correction, encyrption and decryption, data comprehension, numbering systems, binary representation, one's complement arithmetic, HDLC.