An engineer initiated a Cisco IOS ping and received an output of two exclamation points, one period, followed by another two exclamation points (!!.!!). What does this output tell the engineer?
◦ None of the echo messages received a reply.
◦ The third echo message is the only one to receive a reply.
◦ The third echo message timed out, but all the others received a reply.
◦ All five of the echo messages received a reply.