Hosts A and B are 20 000 km away from each other. The propagation speed of the link between them is 25000 mps. The data is placed onto the link at a rate of 8 kbps. The size of the packet of data that needs to be transmitted is 200 bytes. What is the propagation delay in seconds?

Given dа ta:

size of a packet is = 200 bytes

transmission rate = 8 kbps

In a network, transmission delay doesn't depends on the distance between to nodes It depends on the size of packet and transmission rate of the link. transmission delay is calculated by dividing the size of packet by transmission rate of the link. Size of the packet should be in "bits" and transmission rate should be in "bits/sec".

transmission delay (Dt) = The size of the packet (in bits) / transmission rate (bits/sec)

The size of the packet = 200 bytes = 200*8 bits

bandwidth = 8 kbps = 1000*8 bps

transmission delay (Dt) = 200*8/1000*8

= 1/5 = 0.2 seconds

So the Answer is 0.2 second