New PDF release: Communications and Networking: An Introduction

By John Cowley BA, Dip TEO, MSc, MEd (auth.)

ISBN-10: 1846284880

ISBN-13: 9781846284885

ISBN-10: 184628645X

ISBN-13: 9781846286452

Communications and Networking: An Introduction presents a transparent and straightforward to stick with therapy of the topic, written particularly for undergraduates who've no prior adventure within the box. the writer takes a step-by-step strategy, with examples and workouts designed to provide the reader elevated self assurance in utilizing and realizing communications systems.

Topics lined comprise communications applied sciences, networking types and criteria, neighborhood quarter and vast region networks, community protocols, TCP/IP-based networks and community management.

Key features:

• comprises lots of fabric on instant communications, either fastened and mobile

• bargains assurance of community security

• positive factors many explanatory diagrams

• encompasses a entire glossary

Written via John Cowley, a lecturer with a long time' event instructing undergraduate programmes, the textual content takes the reader in the course of the necessities of networking and offers a entire, trustworthy and thorough therapy of the subject.

The Author's site http://www.fcet.staffs.ac.uk/jc9 offers additional fabric within the kind of suggestions, additional examples and different proper topic materials.

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Additional info for Communications and Networking: An Introduction

Sample text

4 Local Area Networks In this chapter we look at various aspects of LANs. The chapter starts with an account of some of the factors that need to be considered when planning a LAN. Decisions about whether to choose a peer-to-peer or client-server LAN and whether to select a wired or wireless network are considered. Various components and devices for both wired LANs and wireless LANs (WLANs) are described. Several wired LAN technologies are briefly described, but the chapter concentrates on Ethernet, which is the commonest technology by far.

Even parity is being used and there is one stop bit. Draw a timing diagram illustrating this. Base your diagram on Fig. 4. 2. Describe hub-based Ethernet LANs in terms of the following dichotomies: serial/parallel transmission, synchronous/asynchronous transmission, fullduplex/half-duplex transmission. In addition to reading this chapter, you may have to do a bit of further research to answer this question. 3. How long, in theory, will it take to transfer a 1-Mbyte file over a network running at 1 Gbps?

Collision detection is needed to deal with this problem. If a station detects a collision while it is transmitting, it sends a brief jamming signal. This signal lets the other stations know that there has been a collision. After sending the jamming signal, the station ceases transmission and then waits for a random time period. When this period is up, the station attempts to transmit again. If there are repeated collisions, this indicates a busy medium. To adjust for this, the time delay between repeated retransmission attempts is progressively increased.

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Communications and Networking: An Introduction by John Cowley BA, Dip TEO, MSc, MEd (auth.)


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