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Coaxial Cables:
Another metallic transmission medium which offers a large bandwidth, is the coaxial cable. Such cables consist of an outer protective shell made of copper tube, less than one inch in diameter, which actually carries messages. There are two types of coaxial cables- the base band and the broad band. Base band cables use digital transmission and are suitable for fairly short distances. These have a data rate of about 50 Mb/s in half-duplex mode. Broad band coaxial cable on the other hand, is more familiar as CATV and is suitable for long distance (up to 15 KM) transmission. It can support data rates of over 100 Mb/s. Coaxial cables, with their better electrical properties, can transmit at much higher frequencies and support wider bandwidth than the twisted pairs. They are suitable, therefore, for high quality bulk transmission of data at high speeds as well as text, picture and voice. For example, one such cable can support the equivalent of up to 10800 telephone (voice) channels.
Evolution of ERP The origin of using computers for business, traces the following line of story. Originally, they were designed to support the repetitive and time consuming fu
It would not emerge practical to type an entire program each time it is required, and to avoid this it is possible to store a program on the disk, with the vast advantage that by b
to find the sum and average of five input number
Networking Operating Systems, Networking OS provides file sharing, Networking OS provides communication scheme, NT Server Security added Multi user capability added RAI
Description A semaphore is a confined variable whose value can be accessed and changed only by the operations P and V and initialization operation known as ''Semaphoiinitislize''.
SPECIAL-PURPOSE AND GENERAL-PURPOSE COMPUTERS In general, there are two types of digital computers. The first is the special-purpose digital computer, which performs a f
Header contains routing and error control information Payload carries the actual user information, either voice, data or video
Moderns: As it was explained earlier, communications channels can operate in either the Analog or digital mode. However, a given circuit can operate only in one mode not both
explain the steps to form a colourful card
They are utilized to move the contents of the operators. Each instruction can be used with many different modes of addressing. MOV MOVS (MOVSB) (MOVSW) MOV INSTRUCTION Principle: D
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