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A packet has arrived in which the offset value is 100, the value of HLEN is 5 and the value of the total length field is 100. What is the number of the first byte?

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A packet has arrived in which the offset value is 100, the value of HLEN is 5 and the value of the total length field is 100. What is the number of the first byte?

(a) 800

(b) 880

(c) 400

(d) 780

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This intriguing question comes from IP Datagram Packet topic in division Internet Protocol, Network Addressing and Transport Level Security of Cryptograph & Network Security

1 Answer

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Best answer
Correct option is (a) 800

The best explanation: Total data bytes = total length – header length = 80 bytes in this datagram.

First byte is 800.

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