Practical TCP/IP and Ethernet Networking for Industry

7

Host-to-host (transport)

layer protocols

Objectives

When you have completed this chapter you should be able to:

• Explain the basic functions of the host-to-host layer

• Explain the basic operation of TCP and UDP

• Explain the fundamental differences between TCP and UDP

• Decide which protocol (TCP or UDP) to use for a particular application

• Explain the meaning of each field in the TCP and UDP headers

The host-to-host communications layer (also referred to as the service layer, or as the

transport layer in terms of the OSI model) is primarily responsible for ensuring end-to-

end delivery of packets transmitted by the Internet protocol ...