By Steve Winder, Mike Tooley BA; Advanced Technological and Higher National Certificates Kingston University
ISBN-10: 0750652977
ISBN-13: 9780750652971
It really is had 3 revisions because the unique 1997 variation; the newest in 2002. It continually saves me time, and is very entire. I want they would factor a 2007 version; the 2002 fabric isn't really dated, yet loads of new expertise has turn into general in view that then: WiFi, IPv6, DSL, VoIP, and so forth.
A must-own for each networking specialist.
Read or Download Newnes Data Communications Pocket Book, Fourth Edition (Newnes Pocket Books) PDF
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Extra resources for Newnes Data Communications Pocket Book, Fourth Edition (Newnes Pocket Books)
Sample text
Listen-before-talking A system in which carrier sense is employed. Listen-while-talking A system in which collision detection is employed. Loaded line A line to which additional series inductance has been added in order to minimise amplitude distortion. This technique is widely used on public telephone lines in order to improve voice quality. Unfortunately, the presence of appreciable series inductance has the effect of seriously limiting the signalling rate of modems and other data communications equipment that might otherwise be connected to such a line.
It is now possible to obtain data rates in excess of 4 Gbps over distances of greater than 100 km and 140 Mbps at distances over 220 km. Submarine cables use optical fibre technology to transmit 160 Gbps over >1000 km. This is achieved using multiple wavelengths and erbiumdoped fibre amplifiers. Optical fibres offer some very significant advantages over conventional waveguides and coaxial cables.
Terminal server A special-purpose node which allows a number of terminals to he connected to a network via a single physical line. A terminal server thus frees network nodes from the burden of establishing connections between local terminals and remote nodes. Terminals connected to a terminal server will, of course, have access to all nodes present within the network. Time division multiplexing Transmission technique in which users share a common channel by allocating segments of time to each (ie, time slicing).