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The padding needs to make the size of the data section 46 bytes. If the data received from the upper layer is 42 bytes, we need 46 − 42 = 4 bytes of padding.

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Harley Cassin

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Q: An Ethernet MAC sublayer receives 42 bytes of data from the upper layer. How many bytes of padding must be added to the data?
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An Ethernet MAC sublayer receives 42 bytes of data from the upper layer. How many bytes of padding must be added to the data Why?

The padding needs to make the size of the data section 46 bytes. If the data received from the upper layer is 42 bytes, we need 46 − 42 = 4 bytes of padding.


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