Ping

Ping

\ windows \system32\ping.exe

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The primary function of Ping is to see if another computer is " alive " and reachable . Ping works on local networks and across Internet connections. For example, if you type ping oreilly.com at a command prompt and get at least one response like this:

 Reply from 209.204.146.22: bytes=32 time=78ms TTL=238 

it means that a successful connection was established and the remote system responded to the ping. Otherwise, you'll see Request timed out , meaning that it is down or the connection has been severed. The syntax of Ping is as follows :

 ping target [-t] [-a] [-i   ttl   ] [-n   count   ] [-l   size   ] [-f]    [-w   timeout   ] [-r   count   ] [-s   count   ] [-j   host_list   -k   host_list   ] [-v   tos   ] 

Option	Description
target	The name or IP address of the remote machine.
-a	Resolve IP addresses to hostnames.
-n count	Number of pings ; default is 4. Has no meaning with -t .
-l size	The size of the packets to send, in bytes; default is 32 bytes.
-f	Turn on the "Don't Fragment" flag in packet.
-w timeout	The amount of time, in milliseconds , before Ping gives up and displays Request timed out; default is 500.
-r count	Display Tracert data, where count is the number of hops.
-s count	Display a time stamp for count hops.
-t	Pings continually until interrupted with Ctrl-C; press Ctrl-Break to show statistics without interrupting.
-j host_list	Impose a "loose" route (with -r ) along which to ping.
-k host_list	Impose a "strict" route (with -r ) along which to ping.
-i ttl	Specify the TTL (Time To Live); valid range 0 to 255.
-v tos	Specify the TOS (Type of Service); valid range 0 to 255.