Description:

fping is a ping(1) like program which uses the Internet Control Message
Protocol (ICMP) echo request to determine if a host is up. fping is
different from ping in that you can specify any number of hosts on the
command line, or specify a file containing the lists of hosts to ping.
Instead of trying one host until it timeouts or replies, fping will
send out a ping packet and move on to the next host in a round-robin
fashion. If a host replies, it is noted and removed from the list of
hosts to check. If a host does not respond within a certain time limit
and/or retry limit it will be considered unreachable.