Suppose an application generates chunks of 20 bytes of data every 20 msec, and each chunk gets encapsulated in a TCP segment and then an IP datagram. What percentage of each datagram will be overhead?

67%

Explanation:

TCP Header = 20 bytes

IP Header = 20 bytes.

Data chunk = 20 bytes

Adding the 20 byte data chunk to the TCP/IP header makes 60 total bytes.

Total = 60 bytes

Overhead is 40 of the 60

i.e (40/60) * 100 = 66.67 %

answer; i believe the correct answer is (quick access toolbar);

none because it's so obvious