May 2006
Intermediate to advanced
480 pages
12h 20m
English
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11.4 Resource Records
Information on domain names and their IP addresses, as well as all the other information distributed via DNS is stored in the memory of name servers as Resource Records (RRs).
A name server (also referred to as a DNS server) loads data into its memory in several ways. Authoritative data are read from files on a disk or obtained via a zone transfer query from another server’s memory. Nonauthoritative data are obtained by the server from other servers’ memory as it answers individual DNS queries.
If a DNS client needs to obtain information from a DNS, it requests RRs from the DNS according to its requirements, i.e., a client can request from a domain server an A type RR with the IP addresses of the particular domain name. A ...
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