====== DHCPING ======
Send a DHCP request to DHCP server to see if it's up and running 
[[https://linux.die.net/man/8/dhcping|dhcping man page]]

  * -v Verbose, print some information.
  * -i Use DHCPINFORM packets. (DHCPINFORM is used by client with Static IP that just wants the DHCP Options. i.e. configuration)
  * -r Use DHCPREQUEST packets (default behaviour).
  * -q Quiet, print nothing on the screen.
  * -t maxwait Maximum time to wait for an answer from the server in seconds. Default is 3 seconds. 
  * -c <client-ip-address> Request this IP address. Note that this is also the IP address the answer will be sent to. 
  * -s <server-ip-address> Send the DHCP packet to this IP address. 
  * -h client-hardware-address Use this hardware-address in the DHCP request. It can be up to sixteen octets separated by colons (i.e. 01:02:03:04)