User's Manual

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User’s Guide Troubleshooting
104
Dia g no sing Pro ble m using IP Utilitie s
ping
Ping is a command you can use to check whether your PC can
recognize other computers on your network and the Internet. A ping
command sends a message to the computer you specify. If the
computer receives the message, it sends messages in reply. To
use it, you must know the IP address of the computer with which
you are trying to communicate.
On Windows-based computers, you can execute a ping command
from the Start menu. Click the Start button, and then click Run. In
the Open text box, type a statement such as the following:
ping 192.168.1.1
Click OK. You can substitute any private IP address on your LAN or
a public IP address for an Internet site, if known.
If the target computer receives the message, a Command Prompt
window is displayed:
Figure 101: Using the ping Utility
If the target computer cannot be located, you will receive the
message Request timed out.
Using the ping command, you can test whether the path to the
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is working (using the preconfigured default LAN IP
address 192.168.1.1) or another address you assigned.
You can also test whether access to the Internet is working by
typing an external address, such as that for www.yahoo.com
(216.115.108.243). If you do not know the IP address of a particular
Internet location, you can use the nslookup command, as explained
in the following section.
From most other IP-enabled operating systems, you can execute
the same command at a command prompt or through a system
administration utility.
nslo o kup
You can use the nslookup command to determine the IP address
associated with an Internet site name. You specify the common