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Q. Explain about Transmission Media?
These, also known as physical channels, can be either bounded or unbounded. Bounded media, in which signals representing data are confined to the physical media, are twisted pairs of wires, coaxial cables, and optical-fiber cables, used in most LANs. Unbounded media, such as the atmosphere, the ocean, and outer space inwhich the transmission iswireless, use infrared radiation, lasers, microwave radiation, radio waves, and satellites. Data are transmitted from one node to another through various transmission media in computer communications networks.
Twisted pairs are used in low-performance and low-cost applications with a data rate of about 1 Mbit per second (Mbps) for a transmission distance of about 1 km. Baseband coaxial cables used for digital transmission are usually 50- cables with a data rate of about 10 Mbps over a distance of about 2 km. Broad-band coaxial cables used for analog transmission (cable TV) are usually 75- cables with a data rate of about 500 Mbps over a distance of about 10 km. The lighter and cheaper fiber-optic cables support data transmission of about 1 Gbps over a distance of about 100 km.
Explain why most interrupts are active low? This answers why most signals are active low when you see the transistor level of a module, active low implies that the capacitor in
Perform the subtraction using 1's complement of 11001 - 10110 Ans. 11001 - 10110 = X - Y X = 11001 1's complement of Y = 01001
Q. Describe about Digital Audio Tape? The most proper tape for backing up data from a disk today is Digital Audio Tape (DAT). It employs a 4mm tape covered in a cartridge. It e
Advantages & Disadvantages Enhanced security and convenience: private keys never require be transmitting or revealing to anyone. They can givce a method for digital signatu
Telephone Traffic is measured in (A) Seconds. (B) Hours. (C) Erlang (D) Pulses per minute. Ans: Telephone Traffic is measured in Erlang.
What is parallel adder? Draw and explain block diagram for 4 bit parallel adder. Ans: By using full adder circuit, any two bits can be added along with third input like a ca
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What are the disadvantages of FCFS scheduling algorithm as compared to shortest job first (SJF) scheduling? Disadvantages: (i) Waiting time can be huge if short requests w
What is a Shift Register? Ans: Shift Register: A register wherein data finds shifted towards left or right while clock pulses are applied is termed as a Shift Register.
When entering word into the cell, press Alt-Enter to insert a line break. When you do so, Excel will automatically give text wrapping to the cell. To reformat existing cells s
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