Specifies numeric output only. No attempt is made to look up symbolic names for host addresses. This is useful for diagnosing data-dependent problems in a network. For example, -p ff fills the packet with all 1's. Specifies quiet output.
Nothing is displayed except the summary lines at startup time and when finished.
Bypasses the routing tables and sends directly to a host on an attached network. If the Host is not on a directly connected network, the ping command generates an error message. This option can be used to ping a local host through an interface that no longer has a route through it. The IP header is only large enough for nine such routes. Also, many hosts and gateways ignore this option.