Block 4 Unit 4

Question 1

What is the purpose of DNS?

Question 2

What three components make up DNS?

Question 3

What is any host or client on the internet needing to look up domain information (can be software as well).

Question 4

What entry in the DNS database contains information regarding the domain names?

Question 5

Recourse records are contained in files called _____

Question 6

What are the name server roles?

Question 7

What zone in the DNS nam space resolves a hot name to an IP address?

Question 8

What zone in the DNS name space resolves IP address to host names?

Question 9

A DNS query is also known as a _____

Question 10

What are the three types of DNS queries?

Question 11

What type of query occurs when a DNS client provides a host name and the DNS resolver “must” provide an answer?

Question 12

In a Recrusive query which DNS server does the resolver start the query processes from?

Question 13

What type of DNS query occurs when a DNS client provides a host name and the DNS resolver returns the “best” answer it can?

Question 14

What type of DNS query occurs when a response is immediately returned to the client because the record is stored in a local cache?

Question 15

How many root domain name servers are there worldwide?