How can I find what my ip address is? See video below:

Transcript:

OK. This movie's going to be the beginning of more movies based on networking. And in this one I'm going to say, what do you do if you want to know what your IP address is, and you don't know how to get your IP address? You've probably heard that; you need an IP address.

All right, well, how do you do that? Well, I'll show you. You're going to need to open up a command prompt, so what I do here is I go to Start menu, go to Run. Right? Type in -- let me see if I can move this over so you can see it. Start. Seek your [inaudible 00:36] . Start. Run. Type in cmd, and that'll open up your command prompt. Now, I already have one open, so let's use that. OK.

All right, here's my command prompt, and the command you're going to put in is ipconfig. And when I do that I get a bunch of responses because I have more than one network card, or more than one network adapter. First of all, I have a virtual adapter -- that is not a physical adapter, but a virtual one -- because I'm using VirtualBox.

Then I have my wireless Ethernet adapter. This is my wireless card. You can see here my IP address is 10.71.0.239. This is a 10 address, starting with the number 10. If it starts with the number 10 that's a private IP address; it's not a public IP address. So this is because I'm behind a firewall. I'm on a private network, so I've been given a 10 address. I have DHCP turned on, so I'm automatically requesting an address, and this is the one I received.

This is my subnet mask, 255.255.240.0, and this is my default gateway. This is the router. This is the way out to the Internet. 10.71.0.1 is the way to the Internet. That's wireless.

And then I also have my Ethernet adapter, but I don't know if it's live yet. Let's see here. [pause] It's not. OK, so, it's disconnected.

Well, let's talk about the VirtualBox adapter. You'll see here this number, auto-configuration IP address 169.254.219.226. If you ever see this one, this is the number that you're given. It's an automatic IP addressing. It's called APIPA, Automatic Private IP Addressing. This is what happens if you don't get an IP address; you get this 169 number.

So this is a default addressing scheme that starts at 169.254.0.1 and goes to 169.254.255.254. And it's given automatically so that computers can talk to each other even if they don't have a DHCP server. If they don't have anybody giving them IP addresses, by default, they'll pick up one of these addresses randomly.

All right. So there it is on IP addressing. Hopefully I'll have some more movies on IP addresses soon.