Which of the following protocols resides in the Data Link & Physical TCP/IP Architecture layer?

(A) SMTP
(B) TCP
(C) Ethernet
(D) IP

Answer:

Ethernet is the correct answer. The datalink and physical layers define the protocols and hardware required to deliver data across the physical network. The two layers work together; in fact, some standards define both the data-link and physical layer functions. The physical layer defines the cabling and energy (for example, electrical signals) that flow over the cables.