TCP IP Illustrated

This collection of systems and networks provides

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Unformatted text preview: and routers running a variety of TCP/IP implementations. It should be noted that there are many more networks and hosts in the noao.edu domain than we show in Figure 1.11. All we show here are the systems that we'll encounter throughout the text. In Section 3.4 we describe the form of subnetting used on this network, and in Section 4.6 we'll provide more details on the dial-up SLIP connection between sun and netb. Section 2.4 describes SLIP in detail. 1.17 Summary file:///D|/Documents%20and%20Settings/bigini/Docu...homenet2run/tcpip/tcp-ip-illustrated/introduc.htm (18 of 20) [12/09/2001 14.46.31] Chapter 1. Introduction This chapter has been a whirlwind tour of the TCP/IP protocol suite, introducing many of the terms and protocols that we discuss in detail in later chapters. The four layers in the TCP/IP protocol suite are the link layer, network layer, transport layer, and application layer, and we mentioned the different responsibilities of each. In TCP/IP the distinction between the network layer and the transport layer is critical: the network layer (IP) provides a hop-by-hop service while the transport layers (TCP and UDP) provide an end-to-end service. An internet is a collection of networks. The common building block for an internet is a router that connects the networks at the IP layer. The capital-l Internet is an internet that spans the globe and consists of more than 10,000 networks and more than one million computers. On an internet each interface is identified by a unique IP address, although users tend to use hostnames instead of IP addresses. The Domain Name System provides a dynamic mapping between hostnames and IP addresses. Port numbers are used to identify the applications communicating with each other and we said that servers use well-known ports while clients use ephemeral ports. Exercises 1.1 Calculate the maximum number of class A, B, and C network IDs. 1.2 Fetch the file nsfnet/statistics/history.netcount using anonymous FTP (Section 27.3) from the host ni...
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This test prep was uploaded on 04/04/2014 for the course ECE EL5373 taught by Professor Guoyang during the Spring '12 term at NYU Poly.

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