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[...]... with an E) Table 1-1 Regulated broadband service offerings Service type Speed T1/DS1 1.544 Mbps T3/DS3 43.232 Mbps OC-3 155 Mbps OC-12 622 Mbps OC-48 2.5 Gbps OC-192 9.6 Gbps OC-255 13.21 Gbps E-1 2.048 Mbps E-2 8.448 Mbps E-3 34.368 Mbps Other common options are frame relay and fractional services, like fractional T1, fractional T3, and fractional OC-3 Frame relay is used point-to-point, for example,... Hat Enterprise Linux (RHEL) RHEL is on an 18-month release cycle, is designed to be stable and predictable, and has no packaged free-of-cost version, though plenty of free clones abound The clones are built from the RHEL SRPMs, with the Red Hat trademarks removed Some RHEL-based distributions include CentOS, White Box Linux, Lineox, White Box Enterprise Linux, Tao Linux, and Pie Box Linux Additionally,... up any Linux computer to accept serial connections, and how to use any Linux, Mac OS X, or Windows PC as a serial terminal You’ll also learn how to do dial-up server administration, and how to upload files over your serial link Chapter 18, Running a Linux Dial-Up Server Even in these modern times, dial-up networking is still important; we’re a long way from universal broadband Set up Internet-connection... in lower-cost devices, nor will you find software that can shovel packets as fast as TCAM Not-So-High-End Commercial Routers The mid-range commercial routers use hardware comparable to ordinary PC hardware However, their operating systems can make a significant performance difference Routers that use a real-time operating system, like the Cisco IOS, perform better under heavy loads than Linux- based... does require permission We appreciate, but do not require, attribution An attribution usually includes the title, author, publisher, and ISBN For example: LinuxNetworking Cookbook, by Carla Schroder Copyright 2008 O’Reilly Media, Inc., 97 8-0 -5 9 6-1 024 8-7 .” Preface | xxi If you feel your use of code examples falls outside fair use or the permission given above, feel free to contact us at permissions@oreilly.com... Marechal Mary Gardiner Conor Daly Alvin Goats Dragan Stanojevi -Nevidljvl Preface | xxiii Chapter 1 CHAPTER 1 Introduction to LinuxNetworking 1.0 Introduction Computer networking is all about making computers talk to each other It is simple to say, but complex to implement In this Introduction, we’ll take a bird’s-eye view of Ethernet networking with Linux, and take a look at the various pieces that make... interface 2 | Chapter 1: Introduction to LinuxNetworking card and a Channel Service Unit/Data Service Unit (CSU/DSU) Don’t expect much from a low-end router—your Linux box with its own T1 interface has a lot more horsepower and customizability A typical T1 setup looks like Figure 1-2 Telco demarc at your site Router Linux firewall Switch T1 line LAN Figure 1-2 Connecting to a T1 line Beyond T1, the... significant number of ISPs still use Microsoft-only 4 | Chapter 1: Introduction to LinuxNetworkingnetworking software Exhibit A is AOL, which supports only Windows and Mac, and replaces the Windows networking stack with its own proprietary networking software This causes no end of fun when you try to change to a different ISP—it won’t work until you reinstall Windows networking, which sometimes works, or... get you up to speed on the basics xv If you don’t already have basic Linux experience, I recommend getting the LinuxCookbook (O’Reilly) The LinuxCookbook (which I authored) was designed as a companion book to this one It covers installing and removing software, user account management, cross-platform file and printer sharing, cross-platform user authentication, running servers (e.g., mail, web, DNS),... useful chapters in this book, and anyone who wants to learn Linuxnetworking will be able to do everything in this book with a couple of ordinary PCs and inexpensive networking hardware Contents of This Book This book is broken into 19 chapters and 3 appendixes: Chapter 1, Introduction to LinuxNetworking This is your high-level view of computer networking, covering cabling, routing and switching, interfaces, . information contained herein. This book uses RepKover ™ , a durable and flexible lay-flat binding. ISBN-10: 0-5 9 6-1 024 8-8 ISBN-13: 97 8-0 -5 9 6-1 024 8-7 [M] To Terry Hanson—thank you! You make it all worthwhile.