In the TCP/IP system, Layer 4 is used to
A) describe the communications equipment.
B) pass data between programs and the transport layer.
C) control packet organization.
D) control the wireless devices in the network.
E) open the connections and maintain them.

Question

Quizplus · Accepted Answer

Layer 4, also known as the transport layer, is responsible for passing data between programs and the underlying network. It is responsible for ensuring reliable communication between end devices, error recovery, flow control, and congestion control. Examples of Layer 4 protocols include TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).

In the TCP/IP System, Layer 4 Is Used to