Advanced Features. Programming with the Resolver and Nameserver Library Routines. Top-Level Domains.
ISBN 10: 0596100574
You see, while you, as a human being, prefer to remember the names of computers, computers like to address each other by number. On an internet, that number is 32 bits long, or between 0 and 4 billion or so. Pick 10 phone numbers out of the phone book at random and then try to remember them. Not easy? Now flip to the front of the phone book and attach random area codes to the phone numbers. This is part of the reason we need the Domain Name System. DNS handles mapping between hostnames, which we humans find convenient, and internet addresses, which computers deal with.
In fact, DNS is the standard mechanism on the Internet for advertising and accessing all kinds of information about hosts, not just addresses. Another important feature of DNS is that it makes host information available all over the Internet.
- DNS and BIND (5th Edition) by Paul. Albitz
Keeping information about hosts in a formatted file on a single computer only helps users on that computer. DNS provides a means of retrieving information remotely from anywhere on the network. More than that, DNS lets you distribute the management of host information among many sites and organizations.
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The Domain Name System gives nameservers the intelligence to navigate through the database and find data in any zone. Of course, DNS does have a few problems. Most administrators on the Internet make do with the documentation their vendors see fit to provide and with whatever they can glean from following the Internet mailing lists and Usenet newsgroups on the subject. New zone administrators suffer through the same mistakes made by countless others.
Our aim with this book is to help remedy this situation. We realize that not all of you have the time or the desire to become DNS experts. Most of you, after all, have plenty to do besides managing your zones and nameservers: system administration, network engineering, or software development. It takes an awfully big institution to devote a whole person to DNS.
DNS and BIND, 5th edition
Read as much as you need to know now, and come back later if you need to learn more. The first two chapters give you a good theoretical overview and enough practical information to get by, and later chapters fill in the nitty-gritty details. We provide a roadmap up front to suggest a path through the book appropriate for your job or interest. One of our zones, incidentally, was once one of the largest on the Internet, but that was a long time ago. Versions The fifth edition of this book deals with the new 9.
While 9. We also occasionally mention other versions of BIND because many vendors continue to ship code based on this older software as part of their Unix products. Whenever a feature is available only in the 8. We use nslookup, a nameserver utility program, very frequently in our examples.
DNS and BIND (5th Edition)
The version we use is the one shipped with the 9. Older versions of nslookup provide much, but not quite all, of the functionality in the 9. Chapters 1 and 2 discuss Domain Name System theory. Chapters 3 through 6 help you decide whether or not to set up your own zones, then describe how to go about it, should you choose to. The middle of the book, Chapters 7 through 11, describe how to maintain your zones, configure hosts to use your nameservers, plan for the growth of your zones, create subdomains, and secure your nameservers.
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Embeds 0 No embeds. No notes for slide. DNS and BIND tells you everything you need to work with one of the Internet's fundamental building blocks: the distributed host information database that's responsible for translating names into addresses, routing mail to its proper destination, and even listing phone numbers with the new ENUM standard. This book brings you up-to-date with the latest changes in this crucial service. The fifth edition covers BIND 9. Read more 8.
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