3.4. Microsoft Windows
The various versions of Windows
include implementations of
ping. With the
Microsoft implementation, there are a number of superficial
differences in syntax and somewhat less functionality. Basically,
however, it works pretty much as you might expect. The default is to
send four packets, as shown in the two following examples. In the
first, we successfully ping the host
www.cabletron.com:
C:\>ping www.cabletron.com
Pinging www.cabletron.com [204.164.189.90] with 32 bytes of data:
Reply from 204.164.189.90: bytes=32 time=100ms TTL=239
Reply from 204.164.189.90: bytes=32 time=100ms TTL=239
Reply from 204.164.189.90: bytes=32 time=110ms TTL=239
Reply from 204.164.189.90: bytes=32 time=90ms TTL=239
C:\>
In the next example, we are unable to reach
www.microsoft.com for reasons previously
explained:
C:\>ping www.microsoft.com
Pinging microsoft.com [207.46.130.149] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Note that this is run in a DOS window. If you use
ping without an argument, you will get a
description of the basic syntax and a listing of the various options:
C:\>ping
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 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.
Notice that the flooding options, fortunately, are absent and that
the
-t option is used to get an output similar
to that used in most of our examples. The implementation does not
provide a summary at the end, however.
In addition to Microsoft's
implementation of
ping, numerous other
versions -- as well as more generic tools or toolkits that include
a
ping-like utility -- are available. Most
are free or modestly priced. Examples include
tjping,
trayping, and
winping, but many more are available, including
some interesting variations. For example,
trayping monitors a connection in the
background. It displays a small heart in the system tray as long as
the connection is up. As availability changes frequently, if you need
another version of
ping, search the Web.
 |  |  |
| 3.3. Software Testing with ping |  | 4. Path Characteristics |
