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The following example uses getaddrinfo() to resolve the domain name www.example.com into its list of addresses and then calls getnameinfo() on each result to return the canonical name for the address. In general, this produces the original hostname, unless the particular address has multiple names, in which case the canonical name is returned ...
In computer networks, a reverse DNS lookup or reverse DNS resolution (rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. [1]
Being free software, FIGlet is commonly included as part of many Unix-like operating systems (Linux, [5] BSD, etc.) distributions, but it has been ported to other platforms as well. The official FIGlet FTP site includes precompiled ports for the Acorn , Amiga , Apple II , Atari ST , BeOS , Mac , MS-DOS , NeXTSTEP , OS/2 , and Microsoft Windows ...
Some large / 8 blocks of IPv4 addresses, the former Class A network blocks, are assigned in whole to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority (IANA), or a regional Internet registry.
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 (>).
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Multicast DNS (mDNS) is a computer networking protocol that resolves hostnames to IP addresses within small networks that do not include a local name server.It is a zero-configuration service, using essentially the same programming interfaces, packet formats and operating semantics as unicast Domain Name System (DNS).
The ver command found in operating systems such as DOS, OS/2 and Microsoft Windows is similar to the uname command. The bash shell provides the special variables OSTYPE and HOSTTYPE whose values are similar to those of uname -o and uname -m respectively.