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Question

Which field is used for error detection

A
Urgent Pointer
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B
Checksum
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C
Sequence number
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D
Acknowledgement number
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Solution

The correct option is C Checksum

Checksum field is used for error detection.

A checksum is basically a calculated summary of such a data portion. Network data transmissions often produce errors, such as toggled, missing or duplicated bits. ... Because of these transmission errors, network protocols very often use checksums to detect such errors.

A checksum is an error-detection method in a the transmitter computes a numerical value according to the number of set or unset bits in a message and sends it along with each message frame. ... If the received checksum value matches the sent value, the transmission is considered to be successful and error-free.

A checksum is a small-sized datum derived from a block of digital data for the purpose of detecting errors which may have been introduced during its transmission or storage. It is usually applied to an installation file after it is received from the download server.

A checksum is the outcome of running an algorithm, called a cryptographic hash function, on a piece of data, usually a single file. ... A checksum is also sometimes called a hash sum and less often a hash value, hash code, or simply a hash.


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