About the Author Niall Murphy has worked in the I.T. and Internet industries since 1995. His initial exposure to computers came with an Amstrad CPC 464 in the early 1980s, from which he never recovered. In college, Niall founded the UCD Internet Society which, at its height, gave Internet access to over two and a half thousand students who would not otherwise have had it. He also played way too much chess. During the process of obtaining a degree in Computer Science and Mathematics, he held down a variety of programming, system and network administration and security-related jobs. After college, he went on to found his own consulting company, and participate in the start-up phase of a large number of companies and projects including Club Internet, Digifone On-Line, and Hutchison 3G. He used to run the root nameservers for Ireland, and is proud of having started five RIPE LIRs. He has experience in networking of almost every kind (with the grateful exception of X.25) UNIX and Windows system administration, C systems programming, Perl, PHP, database creation and management, and Internet/IP services of all kinds, with specialities in database-backed web applications, wireless networking and next-generation networking. As per the old adage, he thinks UNIX is the worst operating system there is, apart from all the others. He is a published poet, RFC co-author and O' Reilly co-author who does landscape photography for fun; you can see some of his work at South Bull Photography. David Malone is a mathematician-cum-sysadmin. He is a researcher in the Hamilton Institute in Maynooth, Ireland, working on mathematical models of communications networks. Since 1994, he's also been a member of the sysadmin team of the School of Mathematics located in Trinity College Dublin, Ireland. There he helps to maintain a Unix-like service provided by FreeBSD and Linux machines. Naturally, they all speak IPv6.