vivian is dumb
to secure analog data is called scrambling in data communication
In data communication computer use periodic analog signal because it Need Less Bandwidth. So, by using Periodic Analog Signals it is easy to select the Medium through Which data is travelled otherwise it is Much Difficult (aprox. Impossible ) .
A transfer of data from point-to-point is simplified as data transmission. Data transmission can be referred to as digital communication but can include analog data transmission as well.
Disadvantage of Analog Communication: 1)Analog Communication systems are costlier than digital communication system. 2)Less Security in Analog Communication 3)More prone to noise interference.
Because I am an analog creature living in an analog world. If I were a computer I would use digital communication. :-/ ?
analog data are continuous and take continuous values
There are four possible combinations of encoding techniques -Digital data, digital signal -Digital data, analog signal -Analog data, digital signal -Analog data, analog signal
In data communication, signals refer to the variations in physical quantities that carry information over a medium. These signals can be analog or digital, with analog signals representing data as continuous waves and digital signals encoding data in discrete binary values. The transmission of these signals enables the exchange of information between devices over various channels, such as wired or wireless networks. Effective signal transmission is crucial for ensuring data integrity and communication reliability.
A modem (modulator-demodulator) converts digital data from a computer into analog signals for transmission over telephone lines or other communication media (modulation) and vice versa (demodulation). The input of a modem is typically digital data from a device like a computer or router, while the output is an analog signal suitable for transmission. Conversely, the input received by the modem is an analog signal from the communication medium, which it converts back into digital data for the receiving device. This process enables internet connectivity and data communication over various types of networks.
Disadvantage of Analog Communication: 1)Analog Communication systems are costlier than digital communication system. 2)Less Security in Analog Communication 3)More prone to noise interference. Advantage of Analog Communication: 1)Transmission bandwidth required is less. 2)No need of synchronization. Advantage of Digital Communication: 1)Digital Communication systems are simpler and cheaper. 2)Using data encryption only permitted user are allowed to detect the transmitted data. 3)Since in Digital Communication, channel coding is used, therefore a large amount of errors may be detected 4)Since transmitted signal is digital in nature,large amount of noise tolerance may be tolerated Disadvantage of Digital Communication: 1)More transmission bandwidth required. 2)Digital Communication needs synchronization in case of synchronous modulation.
Analog data can be send through a wire = wired data Analog data can be send through the air = wireless data). "Wireless data", as in: "data travelling through the air" is always analog because it propagates as a continuous EM wave through the air
Analogue