CN6 Domain Name System

What kind of service does domain name system provides?

• mapping of human-readable symbolic names to computer addresses
• none of the options
• a peer-to-peer name to address mapping service
• suggestions for human-readable symbolic names

How are names separated in domain name system?

• using semi-colons
• using colons
• using commas
• using periods

Domain names are ____, with the most significant part of the name on the right.

• sequential
• self-explanatory
• hierarchical
• none of the options

DNS does not specify the number of ____ in a name.

• values
• segment
• top-level domains
• none of the options

What does ICANN stands for?

• Internet Communication Association for Numbers and Names
• Internet Corporation for Assigned Numbers and Names
• none of the options
• Internet Corporation Association for Names and Numbers

The top-level domain "mil" is assigned to which group?

• Museums
• Mobile Content Providers
• United States Military
• an email interconnection application

What does it mean when organisations try to assign domain names that are mnemonic?

• the names are difficult to remember
• the names are stored in memory
• the names should be difficult to hack
• the names reflect the service provided

Which of the following statement is FALSE?

• Each organisation can contract an ISP to run a DNS server
• all the options are TRUE
• Organisations cannot run multiple DNS servers for their domain names
• Organisations can run a single DNS server for their domain names

When is replication of a DNS server useful?

• to reach out to other areas of the Internet
• for heavily used servers like root servers
• when there are different information to distribute
• to prevent the central authority from finding the authentic DNS server

A DNS server sends a _____ to a DNS request.

• DNS reply
• DNS email
• DNS answer
• DNS authorisation