Which of the following protocols resides in the Transport TCP/IP Architecture layer?

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

Answer:

TCP is the correct answer. The Transport layer determines how much data should be sent where and at what rate. This layer builds on the messages which are received from the application layer. It helps ensure that data units are delivered error-free and in sequence. The transport layer helps you to control the reliability of a link through flow control, error control, and segmentation, or desegmentation.