idden by the layers below it. Figure 1 displays the four different layers of TCP/IP and where some of the many protocols that make up the Internet protocol suite fit within those layers.TCP and IP are two of the many protocols that make up the suite of Internet protocols. Figure 1 lists some of the others. Some of these protocols will be discussed in detail in the next chapter.Other Readings On TCP/IP :A TCP/IP Primer SLOW SITE: http://www.sun.com/sunworldonline/swol-11-1995/swol-11-sysadmin.html The Linux Network Administrator's Guide :(a free copy of a book published by O'Reilly and Associates. Essential if you are networking using Linux.) : ftp://ftp.dstc.edu.au/pub/Linux/docs/LDP/network-guide/The inclusion of these pages is intended to provide you with other readings on TCP/IP if you are interested.B)IPv6 and IpngIPv6 is the formal name of a protocol developed by the IETF's IPng (Next Generation Internet Protocol) working group. IPng is designed to be an evolutionary step from IPv4, the current version of IP being widely used.In this subject we will not be examining IPv6 in any great detail but you should be aware of its existence. The following readings are included for interest.Information on IPv6 :The Official IPng Page SLOW SITE: http://playground.sun.com/pub/ipng/html/ipng-main.html Another IPv6 Page: http://www.openvms.digital.com/openvms/announcements/ipc6-standards.html An Overview of IPng: http://playground.sun.com/pub/ipng/html/INET-IPng-Paper.html = FIGURE 1 =The four layers of TCP/IPSECTION 3 3.1 MOVING DOWN THE LAYERSA) Moving Down The LayersEach of the four layers of TCP/IP perform a different role. In order to perform this role each layer adds a small piece of control information, called a header, onto the front of each packet of information sent.When a packet is sent it moves down the four layers. As it passes through each layer that layer appends its header information onto the front. The information is then sent. ...
