25.Domain Name System

A full domain name is a sequence of labels separated by ________.

• semicolons
• dots
• colons
• none of the above

A ________ server loads all information from the primary server.

• primary
• secondary
• zone
• none of the above

The first level in the generic domains section allows ______ possible labels.

• 10
• 12
• 16
• none of the above

If a label is not terminated by a null string, it is called a __________.

• PQDN
• FQDN
• SQDN
• none of the above

What a server is responsible for or has authority over is called a _________.

• domain
• label
• zone
• none of the above

DNS can use the services of ________ using the well-known port 53.

• UDP
• TCP
• either (a) or (b)
• none of the above

In the domain name chal.atc.fhda.edu, _______ is the most specific label.

• chal
• atc
• fhda
• none of the above

The root of the DNS tree is _______.

• a string of characters
• a string of 63 characters
• an empty string
• none of the above

When the secondary downloads information from the primary, it is called ______ transfer.

• domain
• zone
• label
• none of the above

A _______ is a server whose zone consists of the whole tree.

• domain server
• zone server
• root server
• none of the above