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This meant basic tasks such as translating a UNIX UID to a user name string could stall because NetInfo was stuck on a DNS lookup. At first, it was possible to disable NetInfo and use the Unix system files, but starting in NeXTSTEP version 2, this disabled DNS support. Thus, NeXT computers became notorious for locking a user out of everyday ...
Domain Name System (DNS) resolution is the process of translating a human-readable domain name (for example, en.wikipedia.org) into an IP address that computers can use. Every ISP runs a DNS server to allow their customers to translate domain names into IP addresses that computers understand and use.
The root domain does not have a formal name and its label in the DNS hierarchy is an empty string. All fully qualified domain names (FQDNs) on the Internet can be regarded as ending with this empty string for the root domain, and therefore ending in a full stop character (the label delimiter), e.g., "www.example.com.". This is generally implied ...
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A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a * as the leftmost label (part) of a domain name, e.g. *.example.com. The exact rules for when a wildcard will match are specified in RFC 1034, but the rules are neither intuitive nor clearly ...
For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google. If the A record for dns.google in turn pointed back to 8.8.4.4 then it would be said to be forward-confirmed.
nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).
Effectively, WINS is to NetBIOS names what DNS is to domain names — a central mapping of host names to network addresses. Like the DNS, it is implemented in two parts, a server service (that manages the embedded Jet Database , server to server replication, service requests, and conflicts) and a TCP/IP client component which manages the client ...