DNS Servers Flashcards
Receives queries from client machines and makes additional requests to satisfy the client’s DNS query.
DNS recursor server.
Is the first step in hostname translation and serves as a reference to other, more specific locations.
Root nameserver.
Is the second step in hostname translation and hosts the last portion of a hostname.
TLD nameserver.
What does TLD stand for?
Top Level Domain.
Is the last step in hostname translation and it can return the IP address of the requested hostname.
Authoritative nameserver.
Data persistence process that helps short-circuit the necessary requests by serving the requested resource record earlier in the DNS lookup.
Caching.
What is a recursive query?
It is a request made to a DNS resolver requiring the resolution of the query.
What is an iterative query?
It is a subsequent query to another DNS resolver at a lower level.
What is a non-recursive query?
It is a query that can be resolved by the DNS resolver because it owns the record or because the record is cached.
What is the name of the operating system level DNS resolver?
Stub resolver or DNS client.
Answer “True” or “False” to the following statement.
DNS resolvers must know where to locate the root servers.
True.
Who coordinates most of the TLD?
ICANN.
