Question

Difference between noisy and noiseless channels in computer networks

Answer 1

Explanation:

Two theoretical formulas were developed to calculate the data rate: one by Nyquist for a noiseless channel, another by Shannon for a noisy channel. In the above equation, bandwidth is the bandwidth of the channel, L is the number of signal levels used to represent data, and BitRate is the bit rate in bits per second.

Answer 2

Answer:

Noiseless channel-The formula for calculating noiseless channel is Nyquist Bit rate, theoretical maximum bite rate is also defined by it.

BitRate = 2 * bandwidth * log 2 (L)

Data rate is directly proportional to the number of signal levels.

Noisy Channel- The channel is always noisy as of which we don't have a Noiseless channel in reality. For determining the theoretical highest data rate of a noisy channel Shannon capacity is used. It's formula is:-

Capacity = Bandwidth * log2 (1 + SNR)

Capacity of the channel is in bits per second.

Explanation: