By Douglas E. Comer

Computing device Networks and Internets is suitable for all introductory-to-intermediate classes in machine networking, the net, or web functions; readers desire no history in networking, working platforms, or complicated arithmetic.

Leading networking authority Douglas Comer provides a wide-ranging, self-contained journey of the options, ideas, and applied sciences that let today’s web to help purposes starting from net searching to telephony and multimedia. This 5th variation has been completely reorganized, revised, and up-to-date: it contains large new insurance of themes starting from instant protocols to community functionality, whereas lowering or getting rid of assurance of older protocols and applied sciences. Comer starts off by way of illuminating the functions and amenities provided through today’s web. subsequent, he systematically introduces the underlying community applied sciences and protocols that lead them to attainable: low-level facts communications; packet switching, LAN, and WAN applied sciences; and web protocols comparable to TCP, IP, UDP, and IPv6. With those thoughts and applied sciences verified, he introduces a number of of an important modern concerns confronted through community implementers and executives, together with caliber of carrier, net telephony, multimedia, community defense, and community administration. Comer has conscientiously designed this e-book to help either top-down and bottom-up educating techniques. scholars want no history in working platforms, and no refined math: Comer is based all through on figures, drawings, examples, and analogies, now not mathematical proofs.

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Enthusiastic Comments About Computer Networks And Internets “The book is one of the best that I have ever read. ” Gokhan Mutlu Ege University, Turkey “I just could not put it down before I finished it. ” Lalit Y. ” George Varghese University of California at San Diego “It’s truly the best book of its type that I have ever seen. ” Chez Ciechanowicz Info. ” Jaffet A. ” Peter Parry South Birmingham College, UK “Wow, when I was studying for the CCNA exam, the clear explanations in this book solved all the problems I had understanding the OSI model and TCP/IP data transfer.

Similarly, we will see that the physical layer usually specifies how signals are used to transmit data. Thus, one does not expect to find a Physical layer header. Sec. 9 ISO and the OSI Seven Layer Reference Model At the same time the Internet protocols were being developed, two large standards bodies jointly formed an alternative reference model. They also created a set of internetworking protocols. The organizations are: International Organization for Standardization (ISO) International Telecommunications Union, Telecommunication Standardization Sector (ITU-T)†, The ISO layering model is known as the Open Systems Interconnection Seven-Layer Reference Model.

As a result, some standards can appear to have been designed by a committee making political compromises rather than by engineers and scientists. The seven-layer reference model is controversial. It did indeed start as a political compromise. Furthermore, the model and the OSI protocols were designed as competitors for the Internet protocols. ISO and the ITU are huge standards bodies that handle the world-wide telephone system and other global standards. The Internet protocols and reference model were †When the standard was first created, the ITU was known as the Consultative Committee for International Telephone and Telegraph (CCITT).

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