Setting up DNS and DHCP and name resolution
a) DNS
b) DHCP
c) Nameserver 
d) Forward Resolution
e) Reverse Resolution

DNS:
DNS stands for Domain Name System, or Domain Name Server.
Domain Name Service (DNS) is an internet service that maps IP addresses to fully qualified domain names (FQDN) and vice versa.

BIND stands for Berkley Internet Naming Daemon.
yum install bind*

DHCP:
Dynamic Host Configuration Protocol
Dynamically allocated the IP address to host

Nameserver:
Nameserver is a server on the internet specialized in handling
queries regarding the location of a domain name's various services. 
Nameservers are a fundamental part of the
Domain Name System (DNS).

Forward DNS:
The DNS is queried for the hostname of a certain IP address

Reverse DNS:
The DNS is queried for the IP address of a hostname.

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Regards,
Mallikarjun Ramadurg
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