Which of the following protocols work in the following layers: application, data link, network, and transport?

A.
FTP, ARP, TCP, and UDP

B.
FTP, ICMP, IP, and UDP

C.
TFTP, ARP, IP, and UDP

D.
TFTP, RARP, IP, and ICMP

Explanation:
C: Different protocols have different functionalities. The OSI model is an attempt to describe conceptually where these different functionalities take place in a networking stack. The model attempts to draw boxes around reality to help people better understand the stack. Each layer has a specific functionality and has several different protocols that can live at that layer and carry out that specific functionality.