Question

1. Calculate Checksum for

a)0111001100110011

(hint: you can follow the slide 21 of chapter 3 by dividing it into two 8 bits integers or by dividing it into (k = 4, m =4))

b)1101010101011100010101010101011011011001010110101011101010111001

(hint: you can follow the slide 21 of chapter 3 by dividing it into two 32-bit integers or by dividing it into (k = 4, m =16))

Answer 1

checksum calculation:

a) 0111001100110011

it is separated into 2 8 bits.

1) 01110011 whose hexadecimal values is73

2) 00110011 whose hexadecimal values is 33.

So, the overall hexadecimal value is 7333.

The equivalent checksum for 7333 is 5A.

b)1101010101011100010101010101011011011001010110101011101010111001

The above one is divided into eight 8 bits.

1) 11010101 whose equivalent hexadecimal value is 1B5

2) 01011100 whose equivalent hexadecimal value is 5C

3) 01010101 whose equivalent hexadecimal value is 55

4) 01010110 whose equivalent hexadecimal value is 56

5) 11011001 whose equivalent hexadecimal value is D9

6) 01011010 whose equivalent hexadecimal value is 5A

7) 10111010 whose equivalent hexadecimal value is BA

8) 10111001 whose equivalent hexadecimal value is 39

So, the overall equivalent checksum for the hexadecimal value 01B55C5556D95ABA39 is 1D.