Solved by Expert Tutors
Solved by Expert Tutors
Question

1.Given the ASCII values of characters A, B, C, and D to be 65, 66, 67, and 68 respectively, what is the 

checksum value for the following data if it is transmitted over a reliable connection using the TCP/IP Applet? (Note: Use the checksum algorithm learned in the lecture.)


DABBBCADDC


2.The message "Computer Science is great fun and super useful!" is to be sent over a reliable connection from node 0 to node 1 using TCP/IP Applet. Presuming that the header of each packet is of the same size, what is the ratio of "useful data" to the total data transmitted over the network for the given message? Here is an example of the first packet being sent:

屏幕快照 2020-08-04 11.48.23.png


3.The message "Computer Science is great fun and super useful!" is to be sent over a reliable connection from node 0 to node 1 using the TCP/IP Applet. Presuming that each packet can carry 10 characters of data, how many packets are required for the whole process? Here is an example of the first packet being sent:

屏幕快照 2020-08-04 11.49.24.png


4.Which of the following is a correct IPv4 address?

A.

100 38 29 102

B.

100.27.23

C.

100.27.29.0

D.

120.220.320.420

屏幕快照 2020-08-04 11.48.23.png
屏幕快照 2020-08-04 11.49.24.png

Step-by-step answer

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