computer network supposes internet data in hex is 99 f4 44 27 23 96 e3 4f....

computer network

supposes internet data in hex is 99 f4 44 27 23 96 e3 4f.

what is the checksum(in hex)?

Expert Solution

Answer:- data in hex 99 f4 44 27 23 96 e3 4f
Checksum (msg + checksum) = 0000

Explanation:

Given: 99 f4 44 27 23 96 e3 4f
For calculating the checksum, we have to divide the message into 4 blocks and then add all these 4 blocks together after converting in binary.

0X 99 f4
0X 44 27
0X 23 96
0X e3 4f
Addition of hexadecimal blocks.

99 f4 = 1001 0011 1111 0100
44 27 = 0100 0100 0010 0111
---------------------------------
1101 1000 0001 1011
23 96 =0010 0011 1001 0110
---------------------------------
1111 1011 1011 0001
e3 4f = 1110 0011 0100 1111
---------------------------------
1 1101 1110 0000 0000 (ADDITION OF MESSAGE BINARY)
d e 0 0 (ADDITION OF MESSAGE Hex)
We left the most significant bit.

Complement of added message in Binary (0010 0001 1111 1111 )
Complement of added message in Hex ( 2 1 f f )
So checksum = 21ff

At receiver
(msg + checksum) => (d e 0 0 + 2 1 f f = f f f f )

Complement of this is 0000 , So error is "0" at receiver

venereology answered 1 year ago

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