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When 2 or more bits in a data unit has been changed during the transmission, the error is called ____________

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When 2 or more bits in a data unit has been changed during the transmission, the error is called ____________

(a) random error

(b) burst error

(c) inverted error

(d) double error

I had been asked this question by my school principal while I was bunking the class.

This key question is from Data Link Layer topic in section OSI Model of Computer Network

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Right answer is (b) burst error

Explanation: When a single bit error occurs in a data, it is called single bit error. When more than a single bit of data is corrupted or has error, it is called burst error. If a single bit error occurs, the bit can be simply repaired by inverting it, but in case of a burst error, the sender has to send the frame again.

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