.tk.tk is the Internet country code top-level domain (ccTLD) for Tokelau, a territory of New Zealand in the South Pacific. Tokelau allows any individual to register domain names. Users and small businesses may register any number of domain names free of charge (with some restrictions). In addition to the name itself, users can opt to forward their web traffic using HTML frames and their email traffic, with a maximum of 250 addresses per user log in, or use full DNS, either via their own or third-party servers, or by using Dot TK's servers.
.info.info is a generic top-level domain (gTLD) in the Domain Name System (DNS) of the Internet. The name is derived from information, although registration requirements do not prescribe any particular purpose. The TLD info followed ICANN's highly publicized announcement, in late 2000, of a phased release of seven new generic top-level domains. The event was the first addition of major gTLDs since the Domain Name System was developed in the 1980s. The seven new gTLDs, selected from over 180 proposals, were meant in part to take the pressure off the domain.
.ca.ca is the Internet country code top-level domain (ccTLD) for Canada. The domain name registry that operates it is the Canadian Internet Registration Authority (CIRA). Registrants can register domains at the second level (e.g., example.ca). Third-level registrations in one of the geographic third-level domains defined by the registry (e.g. example.ab.ca) were discontinued on October 12, 2010, but existing third-level domain names continue to be supported. Registrants of .
Domain Name System Security ExtensionsThe Domain Name System Security Extensions (DNSSEC) are a suite of extension specifications by the Internet Engineering Task Force (IETF) for securing data exchanged in the Domain Name System (DNS) in Internet Protocol (IP) networks. The protocol provides cryptographic authentication of data, authenticated denial of existence, and data integrity, but not availability or confidentiality. The original design of the Domain Name System did not include any security features. It was conceived only as a scalable distributed system.
