Question

Find the bit length of a LAN if the data rate is 1 Gbps and the medium length in meters for a communication between two stations is 200 m. Assume the propagation speed in the medium is 2 *10^8 m/s.

Answer 1

Given,

        Propagation speed of the medium is = 2 *10⁸ m/s.

        Length between two stations for a communication is = 200 m.

        Data Rate of the LAN is = 1 Gbps.

Bit Lenght is defined as the total number of bits that can be in transmission at a time on the link.

From length / propagation speed we will get the time take for the bits to travel from Source to destination and

if we multiply this with Data rate then we will get the bit Length.

Hence Bit Lenght = (length / propagation speed) * Data rate

                           = (200/ (2*10⁸) ) * 10⁹

                                    = 2 * 10¹¹ / 2 * 10⁸

                                    = 1000 bits

Hence Bit Lenght =1000 bits.