Communications and Networking: An Introduction by John Cowley

By John Cowley

This textbook offers an in depth creation to the necessities of networking and communications applied sciences. Revised and up-to-date, this re-creation keeps the step by step method of the unique, organised to assist these with no robust wisdom of the subject material. good points: presents chapter-ending summaries and evaluation questions, an Appendix on TCP/IP packet codecs and an extended word list; offers supplementary fabric on the linked Springer web site, together with educating slides, suggestions to the end-of-chapter questions and supplementary workouts with recommendations; offers a better emphasis on cellular computing and community defense, and prolonged assurance of IPv6 (NEW); discusses networking versions and criteria, neighborhood region and huge zone networks, community protocols, TCP/IP-based networks, community administration and instant communications; examines grid and cloud computing, microblogging, cellular advert hoc networks, near-field conversation, energy over Ethernet and the floor Positioning approach (NEW).

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The fibre-distributed data interface (FDDI) is an example of an ANSI networking standard. FDDI is briefly discussed in Chap. 4. As we saw in Sect. org), which devised the OSI 7-layer model. ISO is a network of many national standards institutes, including the British Standards Institution (BSI) and ANSI. int/ITU-T). The ITU-T was formerly called the Consultative Committee on International Telegraph and Telephone (CCITT). The Electronic Industries Alliance (EIA) and the Telecommunications Industry Association (TIA) are US organisations that issue such standards as TIA/EIA-232 (formerly known as RS232-C).

3 Network Layer The network layer is concerned with the routing of packets across a network. The message from the source is split up into packets. The packets are then sent off to the destination. The network layer is concerned with addressing. The source address in a packet identifies the sending computer. The destination address identifies the computer that finally receives the packet. Internet Protocol (IP) is an example of a network layer protocol. 4 Transport Layer The transport layer is responsible for end-to-end connections between hosts (a host is an end user’s computer that is connected to a network).

3. The data must now be put into a packet or datagram. The datagram will include a header containing the addresses of the source and destination. Devices in the network will use these addresses to route the packet. 4. The packet must be put into a frame so that the data can be sent to the network device at the other end of the link. Every network device in the chain of links leading from source to destination needs framing so that it can connect to the next device. 5. Finally, the frame needs to be converted into a bit pattern (1s and 0s) so that it can actually be transmitted over the medium.

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