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In an IPv4 datagram, the value of the header-length (HLEN) field is $(6)_{16}.$ How many bytes of options have been added to the packet?

1. $4$ bytes
2. $24$ bytes
3. $2$ bytes
4. $1$ byte
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HLEN field value in decimal is 6.
Means the header is $6 \times 4=24 Bytes$ in length.

Subtracting 20Bytes from above, should give 4 bytes of options.

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