200-301 · Question #1215
Which two server types support domain name to IP address resolution? (Choose two.)
The correct answer is A. authoritative D. resolver. Authoritative DNS servers provide definitive answers for domain names, while DNS resolver servers process client requests and query other DNS servers to resolve domain names to IP addresses.
Question
Options
- Aauthoritative
- Bweb
- Cfile transfer
- Dresolver
- EESX host
How the community answered
(41 responses)- A95% (39)
- B2% (1)
- C2% (1)
Why each option
Authoritative DNS servers provide definitive answers for domain names, while DNS resolver servers process client requests and query other DNS servers to resolve domain names to IP addresses.
An authoritative DNS server holds the original, master records for a specific domain and directly provides the IP address when queried for a hostname within its domain.
A web server hosts website content and responds to HTTP requests, but it does not perform domain name to IP address resolution for other devices.
A file transfer server, like an FTP server, is responsible for transferring files between clients and servers, not for resolving domain names to IP addresses.
A DNS resolver, also known as a recursive DNS server, receives queries from client applications and performs the iterative process of querying other DNS servers (including authoritative ones) to find the correct IP address for a given domain name.
An ESX host (ESXi) is a hypervisor for running virtual machines and is not designed to function as a primary server for domain name resolution.
Concept tested: DNS server roles (authoritative, resolver)
Source: https://www.cisco.com/c/en/us/products/collateral/security/dns-security/what-is-dns.html
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