Question

The DNS maps the IP addresses to
1. A binary address as strings
2. An alphanumeric address
3. A hierarchy of domain names
4. A hexadecimal address

Answer 1

Correct Answer - Option 3 : A hierarchy of domain names

The correct answer is "option 3".

CONCEPT:

DNS, which stands for Domain Name System, maps domain name into Internet Protocol (IP) address. 

IP → Domain name

Hence, the DNS maps the IP addresses to a hierarchy of domain names.

In reverse DNS lookup, Internet Protocol (IP) addresses are mapped into domain names.  

Domain name→ IP