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ICANN's list of permissible purposes includes domain-name research, domain-name sale and purchase, regulatory enforcement, personal data protection, legal actions, and abuse mitigation. [42] Although WHOIS has been a key tool of journalists in determining who was disseminating certain information on the Internet, [ 43 ] the use of WHOIS by the ...
dig is a network administration command-line tool for querying the Domain Name System (DNS).. dig is useful for network troubleshooting and for educational purposes. [2] It can operate based on command line option and flag arguments, or in batch mode by reading requests from an operating system file.
nslookup is a member of the BIND name server software. Andrew Cherenson created nslookup as a class project at UC Berkeley in 1986 and it first shipped in 4.3-Tahoe BSD [1] In the development of BIND 9, the Internet Systems Consortium planned to deprecate nslookup in favor of host and dig.
Excluded from consideration are single-feature DNS tools (such as proxies, filters, and firewalls) and redistributions of servers listed here (many products repackage BIND, for instance, with proprietary user interfaces). DNS servers are grouped into several categories of specialization of servicing domain name system queries.
Wildcard domains are widely used by blogging websites that allow users to create sub-domains upon demand; e.g., sites such as WordPress or Blogspot. Another popular use is by Free Dynamic DNS websites that allow users to create a DNS name that changes to match their host IP as the IP address is changed periodically by their ISP's DHCP server.
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]
The domain name space consists of a tree data structure. Each node or leaf in the tree has a label and zero or more resource records (RR), which hold information associated with the domain name. The domain name itself consists of the label, concatenated with the name of its parent node on the right, separated by a dot. [23]: §3.1
A website monitoring service can check other internet protocols besides HTTP pages and HTTPS such as FTP, SMTP, POP3, ActiveSync, IMAP, DNS, SSH, Telnet, SSL, TCP, PING, UDP, SOAP, Domain Name Expiry, SSL Certificate Expiry and a range of ports. Monitoring frequency occurs at intervals of once every 4-hours to every 15-seconds.
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