Appendix B. Acronyms and Abbreviations
This appendix identifies abbreviations, acronyms, and initialisms used in this book and in the internetworking industry.
Many of these acronyms and other terms are also described in the Cisco Internetworking Terms and Acronyms resource, available at http://docwiki.cisco.com/wiki/Category:Internetworking_Terms_and_Acronyms_(ITA).
1RU one-rack unit
2RU two-rack unit
AAA authentication, authorization, and accounting
ABR Area Border Router
ACE Application Control Engine
ACL access control list
ACS access control server
AD administrative distance
ADU Aironet Desktop Utility
AES Advanced Encryption Standard
AH Authentication Header
ALG application-level gateway
ANSI American National Standards ...