Which of the following choices lists the two protocols that are used in the Internet architecture
transport layer?

A.
ARP and RARP

B.
TCP and IP

C.
TCP and UDP

D.
DLC and NetBEUI

Explanation:
TCP (Transmission Communications Protocol) and UDP (User Datagram Protocol) are transport
layer protocols (Layer 4).
Incorrect Answers:
A: ARP (Address Resolution Protocol) and RARP (Reverse Address Resolution Protocol) are used
to map an IP address to a MAC address. These protocols run on the IP layer, which is the
Network Layer, Layer 3.
B: TCP (Transmission Communications Protocol) is a transport layer Layer 4) protocol, but IP is
not. IP is a network layer (Layer 3) protocol.

D: DLC (Data Link Control) and NetBEUI are data link layer (layer 2) protocols.