COMPUTER NETWORKING

PHYSICAL LAYER AND TRANSMISSION MEDIA

TRANSMISSION MEDIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Computers send and receive data in the form of ____ signals.
A
Analog
B
Modulated
C
Demodulated
D
Digital
Explanation: 

Detailed explanation-1: -Digital signals are transmitted to computers in the form of electronic signals sent as pulses. The digital device interprets each pulse’s voltage as either a 0 or 1. The image below is an example of a digitized wave.

Detailed explanation-2: -Digital signals can be transmitted over transmission lines using either serial or parallel communication. With serial communication, the sequence of bits used to describe a value is sent in sequence along a single transmission line.

Detailed explanation-3: -Answer: Digital signals are a more reliable form of transmitting information because an error in the amplitude or frequency value would have to be very large in order to cause a jump to a different value. Signals are composed of infinite possible values.

Detailed explanation-4: -A data bus can transfer data to and from the memory of a computer, or into or out of the central processing unit (CPU) that acts as the device’s “engine.” A data bus can also transfer information between two computers.

There is 1 question to complete.