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length field (LTH)

The Length Field (LTH) is a data field in the Ethernet frame according to IEEE 802.3.

It is a 2-byte long field that specifies the number of bytes that are in the subsequent data field. In Ethernet frames, this data field is used as a type field that specifies the network protocol contained in the data field of that data packet. Using this field as a length field provides an additional means of detecting transmission errors.

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Englisch: length field - LTH
Updated at: 18.03.2018
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