DNS maps static and easily human
readable textual (rather than numerical) names to
IP addresses.
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
195.8.66.1 (at the time of writing - the IP address may change)
because a DNS server resolved the string "www.freertos.org"
to the IP address 195.8.66.1.
Like the IP address of the node running FreeRTOS+TCP, the IP address of a
domain name server can be configured either statically as a parameter to
FreeRTOS_IPInit(),
or dynamically from a DHCP server.
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