For instance, if “Bob” walks into work in the morning and starts up his computer, and the DHCP server assigns his computer a dynamic IP address, a DNS entry “bob.example.com” can be associated with that IP address. Even though Bob’s IP address may change every time he starts up his computer, his DNS name remains the same. This lets users communicate with Bob’s computer without knowing the IP address.
You can also use dynamic DNS to provide static host names for users who connect to the Internet through a modem. An ISP can set up dynamic DNS so a home computer has the same host name every time it connects.
Where to Find More Information
For more information on DNS and BIND, see the following:
•DNS and BIND, 4th edition, by Paul Albitz and Cricket Liu (O’Reilly and Associates, 2001)
•The International Software Consortium website: www.isc.org and www.isc.org/products/BIND/
•The DNS Resources Directory: www.dns.net/dnsrd/
Request For Comment Documents
Request for Comments (RFC) documents provide an overview of a protocol or service and details about how the protocol should behave. If you’re a novice server administrator, you’ll probably find some of the background information in an RFC helpful. If you’re an experienced server administrator, you can find all the technical details about a protocol in its RFC document. You can search for RFC documents by number at the website www.faqs.org/rfcs.
•A, PTR, CNAME, MX
•AAAA- For more information, see RFC 1886.
Chapter 2 DNS Service
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