what is Top-level domain
A string of letters used to indicate a organization or an institution.
The following is a list of the top-level domains most often used on the Internet
.arpa: This is Owned by Advanced Research Project Agency (ARPA). Used to register reverse mapping of Internet Protocol version 4 (IPv4) addresses assigned by the Internet Assigned Number Authority (IANA) to DNS domain names for computers that use those addresses on the Internet. This is used by in-addr.arpa domain.
.com: This is used for business and commercial use.
.int: Reserved for international use. Currently planned for use in RFC 1886 to register reverse mapping of Internet Protocol version 6 (IPv6) addresses assigned by IANA to DNS domain names in the ip6.int domain for computers that use those addresses on the Internet.
The following is a list of the top-level domains most often used on the Internet
.arpa: This is Owned by Advanced Research Project Agency (ARPA). Used to register reverse mapping of Internet Protocol version 4 (IPv4) addresses assigned by the Internet Assigned Number Authority (IANA) to DNS domain names for computers that use those addresses on the Internet. This is used by in-addr.arpa domain.
.com: This is used for business and commercial use.
.int: Reserved for international use. Currently planned for use in RFC 1886 to register reverse mapping of Internet Protocol version 6 (IPv6) addresses assigned by IANA to DNS domain names in the ip6.int domain for computers that use those addresses on the Internet.
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