When one dns server receives a recursive request, that dns server issues which of the following to the name servers in its hierarchy, or to servers provided as pointers in reply to earlier requests, until an answer is received?

The answer of the following question is iterative queries .

Explanation:

Because the iterative Domain Name System query is requests for the website names or the URL (uniform resource locator) that the DNS(domain name system) servers respond to with the Internet Protocol address from its zone the file cache, if possible.

The Iterative Domain Name System query also are known as the non-recursive Domain Name System query.

answer; i believe the answer is tls,transport layer security;