Which of the following protocols are examples of TCP/IP data-link layer protocols? (Choose two answers.)
(A) TCP
(B) HTTP
(C) Ethernet
(D) PPP
(E) SMTP
(F) HTTPS
(A) TCP
(B) HTTP
(C) Ethernet
(D) PPP
(E) SMTP
(F) HTTPS
C and D are the correct answers. The Ethernet defines both physical and data-link protocols, PPP is a data-link protocol.
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