What switches can be used with PING?

A. PING is used to test TCP/IP connectivity with another host and gives information about the length of time test data takes to be sent to the host and a reply received.

Its most basic use is as follows:

C:\>ping <IP address or hostname>

Pinging with 32 bytes of data:

Reply from bytes=32 time=10ms TTL=252
Reply from bytes=32 time<10ms TTL=252
Reply from bytes=32 time<10ms TTL=252
Reply from bytes=32 time<10ms TTL=252

From the above you can see it send 32 bytes to host and each time a reply was received in 10ms or less, this shows a good connection.

PING does have a number of option parameters to accomplish different objectives.

ping \[-t\] \[-a\] \[-n count\] \[-l size\] \[-f\] \[-i TTL\] \[-v TOS\] \[-r count\] \[-s count\] \[-k host-list \[-w timeout\] destination-list

-t Ping the specifed host until interrupted.
-a Resolve addresses to hostnames.
-n count Number of echo requests to send.
-l size Send buffer size.
-f Set Don't Fragment flag in packet.
-i TTL Time To Live.
-v TOS Type Of Service.
-r count Record route for count hops.
-s count Timestamp for count hops.
-j host-list Loose source route along host-list.
-k host-list Strict source route along host-list.
-w timeout Timeout in milliseconds to wait for each reply.

In Windows 2000 you can press Ctrl-Break when running the -t option for a list of statisitics. Press Ctrl-C to actually stop the ping.

It can be useful to have a small batch file ping various hosts and terminal servers at regular intervals to ensure all are still present (although there are commercial software packages that do this). A simple command like:

C:\>ping -f -n 1 -l 1

Pinging with 1 bytes of data:

Reply from bytes=1 time<10ms TTL=128

pings a host once with one byte of data.

You should be aware that PING works by sending ICMP echo packets and some routers etc may filter these out meaning a PING will not work.

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