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What is checksum in the data communication?

Anonymous

∙ 12y ago

Updated: 10/3/2023

An acronym for SUMmation CHECK. In data communications, an error-checking technique in which the number of bits in a unit of data is summed, transmitted along with the data, and checked by the receiving computer. If the sum differs, an error probably occurred in transmission and the transmission is repeated. A commonly used personal computer communications protocol called XMODEM uses the checksum technique. In some virus scanning and file integrity software checksums are calculted for every file in a directory and the results are stoed in the directory. When the program is scanningm it compares the checksum information stored in the directory with the current checksum for each scanned file. A difference in the sum may indicate that the file has been infected by a virus that doesn't leave a recognised signature.

Wiki User

∙ 12y ago

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What is the process for generating a 16-bit checksum for data verification?

To generate a 16-bit checksum for data verification, the process involves dividing the data into 16-bit blocks, adding up all the blocks, and then taking the one's complement of the sum to obtain the checksum. This checksum can be appended to the data for verification purposes.

Assume that the data unit 00001111 11110000 excludes the checksum and that it is divided into se Once a checksum checker computes the total for the data unit what will the complement of the result be?

00000000

How do you change checksum?

A checksum is used solely to see if a file has changed or to see if two files contain exactly the same data. The chances of two different files having the same checksum is very, very small. If you change a file in any way, even by one byte, the checksum will change.

What would one need a checksum for?

A checksum (also known as a hash sum) is a small size datum computed from a block of digital data. One would use a checksum to detect errors that could have been introduced during storage.

If the Internet checksum method is adopted what message will be sent if data is 5AD3 EE35 If the message received is 59D3 EF35 B6F6 will the message be accepted?

To calculate the Internet checksum for the data 5AD3 EE35, you need to perform binary addition of the hexadecimal values and then take the one's complement of the result. The checksum value will be sent along with the data. For the received message 59D3 EF35 B6F6, you would repeat the checksum calculation, including the checksum. If the result equals 0, the message is accepted; otherwise, it is rejected. Without performing detailed calculations, it's impossible to definitively say whether the received message will be accepted.

Which field in the IP packet header allows checking for data transmission errors?

time to live

What is the difference between data communication and data communication information2010to2013?

The scope of work and the educational requirements are the difference between data communication and data communication information.

What is a data communication link?

data communication link

What is the ps2's copyrights protection system?

PS2 game CDs have a checksum value of zero in several blocks on the disc where consumer CD burners normally cannot write, and certainly cannot write data that will produce a zero checksum.

Which statements best describes redundancy checking?

Redundancy checking is a technique used to detect errors or errors in a data transmission. It involves adding extra bits to the data to create a checksum or parity. The receiver then checks for errors by recalculating the checksum or parity and comparing it to the received value. If they do not match, an error is detected.

What is scrambling in data communication?

to secure analog data is called scrambling in data communication

List two specific methods used on computers and networks guarantee that the data is correct at the destination?

Error checking, ie. checksum