Question

Suppose an application generates chunks 60 bytes of data every 200msec. Assume that each chunk gets put into a TCP packet and that the TCP packet gets put into IP packets. What is the % of overhead that is added in because of TCP and IP combines?

1) 40%

2) 10%

3) 20%

4) 70%

Answer 1

Solution:

Given,

=>Data size = 60 bytes

=>Data is traversed through TCP and then IP.

The answer will be an option,

(a) 40%

Explanation:

=>Header size of TCP = 20 bytes to 60 bytes

=>Header size of IP = 20 bytes to 60 bytes

Calculating overhead:

=>By default minimum header size is taken into consideration hence TCP header size = 20 bytes and IP header size = 20 bytes

Packet:

IP header

TCP header

Application data

     20 bytes                        20 bytes                           60 bytes

=>Overhead in the packet is IP header and TCP header.

=>Overhead percentage = (total header size/total packet size)*100

=>Overhead percentage = (40/100)*100

=>Overhead percentage = 40%

=>Hence on the basis of above statements option (a) is correct and other options are incorrect because overeade percentage is 40% not 10% or 20% or 70%.

I have explained each and every part with the help of statements attached to the answer above.