[...]... typed, these denote the shell prompt The `$' symbol is used when the command may be executed as a normal user; `' means that the command requires super user privilieges The Linux Documentation Project 22 The Linux Documentation Project The Linux Documentation Project, or LDP, is a loose team of writers, proofreaders, and editors who are working together to provide complete documentation for the Linux. .. may The copyright notice is reproduced on the page immediately following the title page Note that while you are allowed to print out the online version, you may not run the O'Reilly book through a photocopier, and much less sell any of those hypothetical copies 1 2 On the Authors 19 also be caused by changes in the networking software Therefore, you should probably ask on comp.os .linux. help rst There's... erences between the printed version and the online one? Andy Oram has made great e orts at transforming my early ramblings into something actually worth printing He has also been reviewing the other books put out by the Linux Documentation Project, trying to contribute whatever professional skills he can to the Linux community. Since Andy started reviewing the Networking Guide and editing the copies I... Started Guide, written by Matt Welsh, the Kernel Hacker's Guide by Michael K Johnson, and the manpage project coordinated by Rik Faith, which so far supplied a set of roughly 450 manual pages for most system and C library calls The System Administrators' Guide, written by Lars Wirzenius, is still at the Alpha stage A User's Guide is being prepared This book, the Linux Network Administrators' Guide, ... check the information provided in the Networking Guide I also wish to thank all those who read the rst version of the Networking Guide and sent me corrections and suggestions You can nd hopefully complete list of contributors in the le Thanks in the online distribution Finally, this book would not have been possible without the support of Holger Grothe, who provided me with the critical Internet connectivity... like to thank the following groups and companies who printed the rst edition of the Networking Guide and have donated money either to me, or to the Linux Documentation Project as a whole Linux Support Team, Erlangen, Germany S.u.S.E GmbH, Fuerth, Germany Linux System Labs, Inc., United States Vince says: Thanks go to Neil Rickert and Paul Pomes for lots of help over the years regarding the care and... available to Linux users since the rst release The book is organized roughly in the sequence of steps you have to take to con gure your system for networking It starts by discussing basic concepts of networks, and TCP IPbased networks in particular We then slowly work our way up from con guring TCP IP at the device level to the setup of common applications such as rlogin and friends, the Network File... as if it was one Ethernet timing requirements, there may not be more than four repeaters any two hosts on the network Bridges and Routers are more sophisticated They analyze incoming data and forward it only when the recipient host is not on the local Ethernet Ethernet works like a bus system, where a host may send packets or frames  of up to 1500 bytes to another host on the same Ethernet A host is... addresses, and nally, there are hardware addresses, like the 6-byte Ethernet address All these somehow have to match, so that when you 1.3 TCP IP Networks 33 type rlogin quark, the networking software can be given quark's IP address; and when IP delivers any data to the Physics Department's Ethernet, it somehow has to nd out what Ethernet address corresponds to the IP address Which is rather confusing We... to contribute to the System Administrator's Guide Development of TCP IP networking was just beginning, and when those small chapters" started to grow, I wondered aloud if it wouldn't be nice to have a Networking Guide Great", everyone said, I'd say, go for it!" So I went for it, and wrote a rst version of the Networking Guide, which I released in September 1993 The new Networking Guide you are reading