Question: A network cabling installer is inspecting existing cabling in an older building on behalf of a local ISP. The cabling connects several branches of 10BASE-T

A network cabling installer is inspecting existing cabling in an older building on behalf of a local ISP. The cabling connects several branches of 10BASE-T Ethernet to a newer 100BASE-TX trunk. What protocol does the Fast Ethernet standard use that encodes service capabilities into a 16-bit data packet broadcast that allows legacy hosts to choose the highest available connection settings, thus enabling compatibility between the 100BASE-TX and the legacy 10BASE-T? 


A.A communication protocol 


B.A security protocol 


C.A routing protocol 


D.An auto-negotiation protocol

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