Question

Host A is sending a file to Host B. There are 3 links (therefore 2 switches) between the hosts. The file is segmented into packets of 40 bytes, with a 10 byte header added to each packet. Each link has a transmission rate of 100 kbps and a speed of 1000 km per sec. The switches are 100km away from each other. Host A is 50 km away from the first switch while Host B is 150 km away from the second switch. Data travels from Host A to the first switch, on to the second switch and then to Host B. What is the propagation delay (in seconds) when a packet of data travels between the 2 routers?

Answer 1

The propagation delay is "0.1 Sec".

Step-by-step explanation:

Please find attachment of the figure.

The given values are:

Transmission rate of each link

= 100 kbps

Distance

= 100 km

Speed

= 1000 km

Now,

The propagation delay between R1 as well as R2 will be:

⇒
`(DR_1 R_2)/(speed)`

On substituting the estimated values, we get

⇒
`(100 \ km)/(1000) \ Sec`

⇒
`0.1 \ Sec`