A Protocol-based and Architecture-based Perspective
4. Internet Protocol Suite
So far we had presented the mechanisms for traffic management and QoS control in telecommunication networks and in the Internet without considering of the layered network architecture of the communication systems. From our point of view, each of these mechanisms may be used in different protocols, in the several layers and in different communication systems. Based on the basic of these mechanisms, in this chapter, an architecture overview of the Internet and several selected protocols in each layer of TCP/IP protocol suite will be illustrated. The main goal is to introduce you how you can design and develop protocols on the basic of existing mechanisms described in chapter 3. 4.1 Introduction The Internet protocol stack is specified in five layers of the TCP/IP reference model – the physical, data link, network, transport and application. Each layer can be implemented in hardware or in software that cover its own protocols that solve a set of problems involving the data transmission and providing services to the upper layer protocol instance. Figure 4-1: the Internet protocol stack and the Protocol data Unit Instead of using the terminology n-PDU of the OSI reference model, special names for PDUs in the Internet protocol stack are determined: message, segment, datagram, frame and 1-PDU. Each PDU has two parts: header and payload. The header contains the information used for treating the PDU at this layer. The payload holds the user data and the header of the upper layers. The Internet protocols stack und the PDU names are illustrated...
You are not authenticated to view the full text of this chapter or article.
This site requires a subscription or purchase to access the full text of books or journals.
Do you have any questions? Contact us.Or login to access all content.