How do I find the IP Address of my Mac?

Thanks, Bob

I had seen that, but whenever the IP address are shown, it is sometimes difficult to determine if it belongs to the computer that you are operating from or to the remote computer that you are trying to reach.

Herschel

When I am at my PC and I do "ipconfig /all" in a command window, it brings up the same IP address as seen in my Systems Pref/Network/Airport/TCP/IP. This is what confused me. Can both of these computers have the same IP address? I should mention that right now, my PC is down (out of commission). Once this gets running again, would I see both IP's the same?

When I look in my router web page, I see a host name address, a Local IP address (which is the router IP address) and the Internet IP address. None of these even look familiar. Are any of these the PC address? If not, what am I seeing when I do the IP Config on the PC?

Herschel

Thanks rfruth
It seems to make some sense.
My configuration is the following. I have PC1 hooked up to a router. I have PC2 and the Mac wireless.

The PC1 has its configuration to automatically obtain its IP address.
(Note: The router also says "Obtain IP Address Automatically".

PC2 has its configuration with a fixed IP address, 192.168.1.6. (I understand that sometimes this can also be set to obtain it automatically, but for me that does not work, so it is fixed).

For the Mac, I assume that it obtains it automatically. Most of the time it is 192.168.1.100. However, when I do see another IP address such as 192.168.1.101 or 192.168.1.102 and I "Renew DHCP Lease", it goes back to the 192.168.1.100.

My Linksys router has its own IP address as 192.168.1.1

The only sure IP address I know of is the one I assigned to PC2 (192.168.1.6). As I mentioned, if I do the "ipconfig /all" on PC1, almost all of the time I get 192.168.1.100. I always thought this was the IP address of the PC1, but Bob indicated that if it shows up in System Preferences/Airport/TCP/IP, it belongs to the Mac.
When I ping 192.168.1.6 or 192.168.1.100, I get a response. Any other address does not get a response.

If I had to guess how all this works, I would think:
PC2 will always be recognized at the 192.168.1.6 address.
PC1 and the Mac will be assigned their IP Address automatically. This can be 192.168.1.100, 192.168.1.101, 192.168.1.102 or perhaps even 192.168.1.103.

My question, if this is the case, is this:
At any point in time, when all computers are operating, how can I find the IP addresses of each.
The Mac can be found in System Preferences.
I assume PC2 never changes since it is fixed.
But, whose address is IPCONFIG on PC1 showing me? If it belongs to PC1, then I have to assume that if I look in the Mac, I will not see the same address. Correct?

Thanks
Herschel

Set the Lease time. That's very interesting, Bob

First, how is this done.
Second, if you do this, does this essentially lock in the IP address so that the automatic feature is negated? Of what advantage is this, since assigning new numbers to the computers does not seem to create any type of problem that I know of? At the end of a week, you still could end up with another IP Address.

Herschel

Well, thanks to you, Bob, I really learned something today. This setup is a first for me. That is, setting up the router and 2 wireless computer configurations. Especially when 1 PC gets its IP assigned automatically and 1 requires it to be configured. Add to this, seeing all of these IP address numbers flying around and confusion reigned for me. When I only had 2 PC's, it was fairly easy, but throwing the Mac into the equation really presented a challange. Just to get the remote printer working with the Mac took 2 days.

Now I think I understand how this works. I did see in the router setup where the Lease time can be changed. I am sure this information will help others looking in.

Herschel