Communications and Networking: An Introduction (2nd Edition) by John Cowley

By John Cowley

Machine communications and networks are a vital part of any machine technological know-how measure, with the know-how starting to be ever extra pervasive in glossy life.

This transparent and easy-to-follow textbook offers an in depth advent to the necessities of networking and communications applied sciences, supported through various diagrams, examples and routines designed to extend self assurance in utilizing and figuring out communications structures. completely revised and up-to-date, this much-anticipated re-creation keeps the preferred step by step technique of the unique, organised to assist these with no robust wisdom of the subject material to understand the fabric quickly.

Topics and features:

* offers chapter-ending summaries and overview questions, an Appendix on TCP/IP packet codecs and an accelerated Glossary
* offers supplementary fabric on the linked Springer web site, together with educating slides, suggestions to the end-of-chapter questions and supplementary workouts with solutions
* offers a better emphasis on cellular computing and community defense, and prolonged assurance of IPv6 (NEW)
* Discusses networking types and criteria, neighborhood region and huge quarter 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)

Written particularly for undergraduate scholars of computing with out earlier adventure within the box, this complete and authoritative textbook attracts upon the author’s a long time of educating adventure.

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Extra resources for Communications and Networking: An Introduction (2nd Edition) (Undergraduate Topics in Computer Science)

Sample text

The cladding stops the light beam getting out of the fibre, relying on the principle of total internal reflection. There is a buffer layer (usually plastic) around the cladding to protect it from damage. Finally, a plastic jacket surrounds the other layers. A cross section of a fibre-optic cable is shown in Fig. 33. The cables are often used in pairs, with a fibre for each direction. Fibre-optic cable has several advantages over copper. It offers higher data rates and needs fewer repeaters. It is light and occupies little space.

The medium does not need to be the same along the complete path from source to destination. For example, an e-mail might start out from a portable machine connected wirelessly to a LAN, then pass onto a network wired with copper cable, then onto a WAN link wired with fibre-optic cable, then onto a satellite (microwave radio) link and so on. 5 Fig. 4 41 The OSI and TCP/IP Models Compared Source Destination Application Application Transport Applicatio Transport n Applicatio Internet n Internet Network Access Interne Network Access t TCP/IP Model The OSI 7-layer model was devised before the OSI protocols.

The OSI and TCP/IP models were then briefly compared. The importance of networking standards was highlighted. Finally, several important networking standards bodies were mentioned. 8 Questions 1. What are the advantages of organising network architectures in layers? 2. Which of the following does a physical-layer protocol deal with? • Control signalling • Plugs and sockets • Checking for errors 3. 8 4. 5. 6. 7. Questions 45 Facts (i) Uses the raw transmission facility provided by the physical layer and makes the communication channel appear free of errors (ii) The environment in which users’ programs operate and communicate (iii) Concerned with establishing and maintaining a communication path between two users (iv) Concerned with the format of the data being exchanged by the communicating parties (v) Concerned with routing ‘packets’ across a network (vi) Concerned with the mechanism for transmitting bit patterns over a communication channel (vii) Hides all the network-dependent characteristics from the layers above it What are the layers in the TCP/IP model?

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