Titlebook: Data Communications for Engineers; C. G. Guy Textbook 1992Latest edition Macmillan Publishers Limited 1992 communication.computer.set

GENRE

Local Area Networks,switch into the host and to boost dramatically the data transfer rate by using . technology. With the advent of cheap optical fibres, even the restriction of physical proximity can be substantially reduced.

browbeat

decode

propose

Meditate

Analog Data Transmission,al data at baseband, however it is encoded. The most commonly quoted example is that of a public switched telephone channel, which is severely band limited to between 300 Hz and 3.3 kHz, restricting the transmission of baseband signals. Other examples are optical fibre channels, which can only pass

美麗的寫

Error Control and Data Compression Codes, corrected is extremely important. If information is represented in this way there must be redundancy in the code, in other words there must be combinations of bits which do not represent normal data. These sequences are denoted as not allowed. Some error control codes simply detect one or more bit

Cuisine

Physical Layer Standards,itched telephone network. So far as the user is concerned there is a choice between dial-up voice grade lines or slightly higher grade lines which can be leased from the telephone company. Both require the digital data to be modulated onto an analog waveform, using a . The line providers may do anyt

翻動(dòng)

The Data Link Layer,ply, a stream of binary bits. However the information source, usually a computer, does not organise its data on a bit by bit basis and the information receiver will also need to know how each bit relates to the previous one. The first step in matching the organisation of the bits to be passed over a

摘要

Pastry

Local Area Networks,e packet switches separate from the hosts and low data transfer rates, can be overcome. It is possible to include many of the functions of the packet switch into the host and to boost dramatically the data transfer rate by using . technology. With the advent of cheap optical fibres, even the restric