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In OSPF header, which field is used to detect errors in the packet?

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In OSPF header, which field is used to detect errors in the packet?

(a) Type

(b) Area ID

(c) Authentication type

(d) Checksum

The question was asked in an online interview.

Asked question is from OSPF topic in section Network Layer of Computer Network

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The correct answer is (d) Checksum

To elaborate: Checksum field is used to detect errors. It makes sure that the data portions that are being sent are all in integrity. It can detect duplicated bits. Once an error is detected, the sender has to re-transmit the data as it won’t receive an acknowledgement.

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