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NTC/362 Fundamentals in Networking Analog and Digital Comparison

An assignment comparing analog and digital networking concepts.

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    Analog and Digital Comparison NTC/362 Fundament als in Networking Compare and contrast analog and digital signals in terms of their transmission, advantages, and disadvantages. Discuss the key modulation techniques used in analog signal transmission, such as Amplitude Modulation (AM) and Frequency Modulation (FM), and explain how they impact signal quality. Additionally, evaluate the role of digital signals in modern telecommunication systems, including the impact of technologies like ADSL, Wi - Fi, and QAM. Finally, explain the importance of signal quality in both analog and digital systems, and discuss how digital technologies have improved transmission efficiency and error reduction. (Word count: 1500 - 2000 words)

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    A signal is simply the transmission of data from one place to another place. In our day to day life we deal with various signals constantly like signals from music, power lines, telephones, and cellular devices. Analog and digital are two kinds of signals which are used for the transmission of information from source to destination. Usually the information to be transmitted from one place to another is either audio or video. This information signal is then transformed into those signals which can be transmitted via different channels. For the analog format, the data is transformed into electrical pulses with varying amplitude while for the digital format; the data is transformed into binary format representing two amplitudes. We have various such equipment like analog or digital phones, fax machines, modems, clocks, watches etc. Analog technology is the older one and has been used for decades. It is cheap too but the problem with analog signals is that there is a limitation on the size of the data that can be transmitted at any given point of time. With the advent of digital technology many improvements and new techniques have been introduced. Now days almost every appliance or equipment is based on digital technology. In this, the transmitter translate the data into binary form and the receiver re assemble and produces the original information signal. Digital signal as compared to analog gives us more options as it can be easily computed and manipulated by software. Also digital signals are frequently used in telecommunication. Instead of having various advantages over analog signal, digital signal lag behind in quality. Since in digital devices there is translating and reassembling of data because of this reason its quality is not that good. But with new technologies we can possibly remove errors and noise in the digital signal. But digital is quite expensive as compared to analog and working is going on globally to reduce its price. Digital to Analog conversions involve a conversion process with DAC. This devise takes the binary code converting it to the analog signal. Digital to analog signals can compromise the quality of the signal, if it is not actively monitored. Analog lines, which are also known as POTS lines usually support standard phone lines, fax machines or alarm lines, keeping them separate from the digital PBX equipment. An example of digital to an analog signal would be the use of a modem for Internet use that converts computer digital signals using POTS lines. Advantages and Disadvantages of Common Modulation Techniques Amplitude Modulation

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