DNS maps static and easily human
readable textual (rather than numerical) names to
A domain name server resolves the text domain name to the appropriate IP address.
For example, entering "ping www.freertos.org" in the command console of a
desktop computer will show a ping request being sent to the IP address
184.108.40.206 (at the time of writing - the IP address may change)
because a DNS server resolved the string "www.freertos.org"
to the IP address 220.127.116.11.