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PING
The PING command is one of the most useful commands in the TCP/IP protocol. It sends a series of packets to another system, which in turn sends back a response. This utility can be extremely useful in troubleshooting problems with remote hosts.
The PING utility is used as a command-line program, and accepts the following parameters:
Usage: ping [-t] [-a] [-n count] [-l size] [-f] [-i TTL] [-v TOS] [-r count] [-
s count] [[-j host-list] | [-k host- list]] [-w timeout] destination-list
Options:
-t Pings the specified host until interrupted
-a Resolves addresses to host names
-n count Number of echo requests to send.
-l size Sends buffer size
-f Sets Don't Fragment flag in packet
-i TTL Time to Live
-v TOS Type of Service
-r count Records route for count hops
-s count Time stamp for count hops
-j host-list Loose source route along host-list
-k host-list Strict source route along host-list
-w timeout Time-out in milliseconds to wait for each reply
The PING command indicates whether the host can be reached, and how long it took for the host to send a return packet. On a local area network, the time is indicated as less than 10 milliseconds, but across wide area network links, this value can be much greater. |
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