1Suppose host A sends a large file to host B Host A is conne

1.Suppose host A sends a large file to host B. Host A is connected to a 1 Gb/s link, Host B is connected to a 20 Mb/s link, and the network between their links operates at 10 Gb/s. What is the fastest rate at which B can expect to receive the file?

2.Suppose host A sends a large file to host B. Host A is connected to a 4 Mb/s link and host B is connected to an 8 Mb/s link. The network between their links is 100 Mb/s. What is the fastest rate at which B can expect to receive the file?

Solution

All data transfers between any two nodes in a network or in different networks , happens at the slowest connection speed in between the nodes .

1. So in this case data transfer from A to B is from 1 GB/s link to 10 GB/s link to 20 MB/s link which effectively becomes 20 MB/s . The fastest rate at which B can expect to receive the file is 20 MB/s .

2. In this case data transfer from A to B is from 4 MB/s link to 100 MB/s link to 8 MB/s link which effectively becomes 4 MB/s . The fastest rate at which B can expect to receive the file is 4 MB/s .