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COMMUNICATION CHANNELS:
A wire pair connecting two telephones is the simplest circuit, allowing communication in both directions. Other channels include coaxial cables, optical fibres, satellites, a light beam, microwaves, and others. Whatever the physical medium over or through which message travels, transmission may take place in a number of different modes. They are :
Simplex Half-duplex and Full-duplex. Simplex In this type of channel, the message travels in only one direction, that is from point A to point B but not back again.
Half-Duplex: Transmission can take place in either direction, but not at the same time. In other words, message can be transmitted either from A to B or by B to A one at a time.
Full-Duplex: In this type of arrangement messages can be transmitted and received over the same channel at the same time. Many librarians and information scientists are familiar with the latter two types because database search terminals must be set to transmit full or half duplex in order to communicate with database vendors' computers.
Data buses: The availability of reliable digital semi-conductor technology has enabled the inter-communication task between different equipment to be significantly improved. P
Input Devices: i) Keyboard is the most common form of input devices. It was originally designed in the last century. Since then, only minor improvements have taken place in k
Q1: ER modelling & logical design. An information system is required for an online auction site, based on the following speci?cation: Only registered users can use the site. Privat
Problem 1 What is conditional operator? Using conditional operator find a smallest number between two numbers Defining conditional operator Using it to find smallest n
Analog Transmission: In analog transmission, there is a continuous up and down pattern. For example, one wave constitutes one cycle, which is measured in the unit called Hertz
Advantages:- • Sharing Treads permit the sharing of a lot resources that cannot be shared in process, for instance, sharing code section, data section, Operating System resource
discuss waterfall
QUESTION (a) Consider a system with input x[n] and output y[n] that satisfy the difference equation: Y[n] = x[n] + 0.5 x[n-2] + 0.2 x[n+1]
Example of register Assignment & R/M Assignment
create a flowchart showing average score for the 3 quizzes assume that there are 3 sections each having 5 students the only valid number to be entered is 1-100 for the quizzes shou
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