original question: Which top level domain has the domain type of [Country code top-level domain] ?
answer: su, .bq, tz...
answer type: Top Level Domain.
auxiliary information: A country code top-level domain is an Internet top-level domain generally used or reserved for a country, a sovereign state, or a dependent territory. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs. In 2010, the Internet Assigned Numbers Authority began implementing internationalized country code TLDs, consisting of language-native characters when displayed in an end-user application. Creation and delegation of ccTLDs is described in RFC 1591, corresponding to ISO 3166-1 alpha-2 country codes.
[Country code top-level domain] is the type of domain within which top level domain?