首次通过率仅为5%，淘汰率高达80%的CCIE考试正变得日益残酷，本书正是为考试人员准备的，围绕第每个考试主题进行详尽透彻的阐述，本书特色在于：覆盖CCIE全部的课程目标，关注CCIE最新的考试信息，收集全新的Cisco实现与设计实例，包括大量CCIE的测试题，附送CCNA和CCNP自测题。

Chapter 1 Getting Started
Introduction
Conclusion
Chapter 2 Data Link Layer-MAC Layer Issues
Data Link Layer Addressing
Address Summary
Ethernet Architecture
Summary of Ethernet Frame Formations and Descriptions
802.2 LLC Header
Fast Ethernet Architecture
Ethernet Vendor Addresses
Gigabit Ethernet Architecture
Token Ring Architecture
FDDI Architecture
Chapter 3 Logical Link Control Layer lssuse
Introduction
LLC Type 2 Operation
LLC Type 1 Operation
Summary
Chapter 4 Bridging Architectures

It is difficult to thank all the individuals who have been instrumental in the completion of
this project. First, I would like to give honor to God, the creator, without whom nothing I
have achieved would be possible.
I would like to thank my wife, Sharon W. Giles, who has been my rock and partner and who has provided unconditional love and support. Sharon, thank you for always being there for the family and me. You bring balance, joy, and love to me always. I place this work with respect and humility at your feet. To my children Nakisha, Bradford, and Justin, thank you for your gift of love and understanding about all the time I spent away from home. You make a father proud. Bradford and Justin, thank you for being patient during this project. I love you an and appreciate the sacrifices you have endured.
I would like to dedicate this book to my mother, Lake Giles, and Father, the late Enourmas Giles, whose love and support has sustained me through all these years. Mother, you and Father made me reach higher than I ever would have; thank you. I would like to thank my sisters Gertrude Good, Shirley Good, Vera Jean Dogan, Dorothy Ngongane, Emily Land,Sandra Mcbeth, Mary Watkins, Ruthie Mae Holland, and Vergie Mae Glenn for all the love,support, and encouragement. A special thanks to my brother, James Giles, who sacriaced himself for us during the lean times. James, thanks for providing the framework of knowledge you taught me about business; I am forever indebted to you. Thank you from the bottom of my heart, and I will always be there when you need me. Mildred Giles, my sister-in-law, is the best, always and Margaret Watts, without your support and love, I would be nowhere. I don't think that anyone could have in-laws as thoughtful and supporting as you; many thanks.
I would like to thank the village who assisted in shaping me as a individual. First, thanks
go to all the students who have attended courses at Information Management Systems, Inc.,over the years. Thank you for trusting us in your learning process. We are forever grateful.The Emanuel Chapel Baptist Church membership-thanks for the encouragement. The late Leo and Ila Thomas; Dr. Julia Long, professor of Mathematics at the University of South Carolina, nature has removed the braids; Dr. John Donovan of MIT; and Rick Strasser of Milliken and Company, who saw the positive and gave me a chance.the vote of confidence and for being my mentor, Rick. Gus Allen, thanks for the opportumity. Nelson Smith, thanks for the words of encouragement during my tenure in LaGrange.Jessie Johnson, thanks for the promotion, and a special thanks goes to Mr. Roger Milliken,one of the best-run companies in the world.guiding me through the difficult times in learning my new job at Milliken & Company.Thank you, Beck Sanders and Betty Joe, for helping me hone my typing skills and for being such good friends.
XXII Acknowledgments
the late Mr. Bennie Smith, Aunt Deara Washington, Frank and Doris Giles, and my late grandmother Beulah Copeland for an the support during my upbringing.
The encouragement and support of friends like Richard and Linda Costa, Dr. Moses and Rita Jones Dr. Cameron Alexander; John Collier; Marvin Anderson; Alvin and Janice Johnson; James P. Cavanagh; Bill and Sharon Livingston; Curtis Crawford, President of AT&T
Micro-Electronics; and Edward Menifee made the time special.
Special thanks to Dave Brambert, who as a friend and business partner, was always willing to encourage and listen. Thanks also for making my writing better with your comments.
Information Management Systems, Inc., Personnel
I am one of the luckiest individuals in the world to have such a dedicated staff of Support
and Systems Engineers. I would like to thank the following Systems Engineers for their hard work putting this book together. These individuals deserve special recognition: Curtis Watts and Kenneth Jones who labored very hard and long with this project and werethereallthe way. Thanks, guys, for keeping the fire alive. Special thanks to Palaniappan Alagan in addition to CCIE for your steadfast devotion: Larry Mobley, J.C Fang, Johnny Bass, Richard Deal, and Patrick Delio. The support staff of Cheryl Johnson, Jackie Derim, Carol Cook,Hanifah McClendon, and Sandra Jones, thanks for putting up with me during this project.
I would Iike to dedicate this book to my wife, Suh-Jiuan, my son, Yi-Feng, and my daughter, Xin-Hui, for their understanding and caring.
--Jeh-Chuan Fang
I would like to dedicate this book to my beloved parents and sister, Vignes, for all the fond
memories.
--Palaniappan Alagan CCIE #1922