TCP IP Illustrated

Netcount using anonymous ftp section 273 from the

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Unformatted text preview: c.merit.edu. This file contains the number of domestic and foreign networks announced to the NSFNET infrastructure. Plot these values with the year on the x-axis and a logarithmic y-axis with the total number of networks. The maximum value for the y-axis should be the value calculated in the previous exercise. If the data shows a visual trend, extrapolate the values to estimate when the current addressing scheme will run out of network IDs. (Section 3.10 talks about proposals to correct this problem.) 1.3 Obtain a copy of the Host Requirements RFC [Braden 1989a] and look up the robustness principle that applies to every layer of the TCP/IP protocol suite. What is the reference for this principle? 1.4 Obtain a copy of the latest Assigned Numbers RFC. What is the well-known port for the "quote of the day" protocol? Which RFC defines the protocol? 1.5 If you have an account on a host that is connected to a TCP/IP internet, what is its primary IP address? Is the host connected to the worldwide Internet? Is it multihomed? 1.6 Obtain a copy of RFC 1000 to learn where the term RFC originated. 1.7 Contact the Internet Society, isoc@isoc.org or +1 703 648 9888, to find out about joining. file:///D|/Documents%20and%20Settings/bigini/Docu...homenet2run/tcpip/tcp-ip-illustrated/introduc.htm (19 of 20) [12/09/2001 14.46.31] Chapter 1. Introduction 1.8 Fetch the fileabout-internic/information-about-the-internic using anonymous FTP from the host is.internic.net. file:///D|/Documents%20and%20Settings/bigini/Docu...homenet2run/tcpip/tcp-ip-illustrated/introduc.htm (20 of 20) [12/09/2001 14.46.31] file:///D|/Documents%20and%20Settings/bigini/Documenti/homenet2run/tcpip/tcp-ip-illustrated/link_lay.htm Link Layer 2.1 Introduction From Figure 1.4 we see that the purpose of the link layer in the TCP/IP protocol suite is to send and receive (1) IP datagrams for the IP module, (2) ARP requests and replies for the ARP module, and (3) RARP requests and replies for the RARP module. TCP/IP supports many different link layers, depending o...
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