Net2 Finals Exam

What does DNS stand for?

• Domain Name System
• Dynamic Name Service
• Digital Network Server
• Data Network System

What does DNS resolve domain names to?

• Letters
• Colors
• Symbols
• Numbers

What is the purpose of a resolver server in DNS?

• To store domain names
• To manage top level domains
• To operate root servers
• To check its own cache memory for IP addresses

How many sets of root servers are there in the DNS hierarchy?

• 10
• 13
• 12
• 15

What is the responsibility of the top level domain server?

• To resolve domain names to numbers
• To store IP addresses for all domains
• To manage and maintain information with dot domain, e.g. the ".com".
• To direct the resolver to the root server

What is the final authority for knowing everything about a domain?

• Authoritative name server
• TLD server
• Resolver server
• Root server

What does the authoritative name server respond with to the resolver?

• Domain name
• Root server address
• IP address
• TLD server address

What does the resolver do with the IP address it receives?

• Deletes it immediately
• Stores it in its cache memory
• Sends it to the root server
• Shares it with other resolvers

What is the purpose of DNS in a web browser?

• To convert domain names to IP addresses
• To track user activity
• To display advertisements
• To block certain websites

What is the analogy used to explain how DNS works?

• Calendar
• Cookbook
• Dictionary
• Phone book