Question

What is the fastest line speed at which a host can blast out 1500-byte tcp payloads with a 120-sec maximum packet lifetime without having the sequence numbers wrap around? Assume tcp,ip,ethenet over head as 20,20,26 bytes respectively. Take tcp, ip, and ethernet overhead into consideration. Assume that ethernet frames may be sent continuously. A. 299 mbps b. 400 mbps c. 309 mbps d. 199 mbps

Answer 1

The calculation is done below.

In a IPv4 only 2 bytes can be sent by a network at every 120 seconds.

For calculating the total payload we apply the formula.

The total payload=Total number of bytes/Max number of packet lifetime

Now we need to substitute value of total bytes as 2 ^32

now the total payload is =2^32/120 that comes to 35791394