Ip address to Hostname & Hostname to Ip address

To find the Ip address of a host/Site [Name to IP]

Goto -- > cmd --> nslookup--> www.google.com,

or

Simpy goto --> Run -->cmd --> ping systemname [This gives the IP address]

To find the Hostname of a Computer/Server [IP to Name]

Goto --> cmd --> tracert ipaddress

or

Simpy goto --> Run -->cmd --> ping -a IP Adress [This gives the hostname]