Verified answer

Every host on a network needs a unique IP address. It's like your house address. No 2 the same.

Private networks have addresses assigned to them from what's known as private address space in the range of :

10.0.0.0 - 10.255.255.255

172.16.0.0 - 172.31.255.255

192.168.0.0 - 192.168.255.255

You can read about them in RFC1918 at http://www.faqs.org/rfcs/rfc1918.html

Each ISP has what's called a net block which is a range of addresses they buy. You get leased an IP address in that range and that becomes your external IP address. That's how people can tell your ISP and your location from your IP address.

Your router does what's called NAT (Network Address Translation) which means it changes the address on data coming in to your private network address and translates data going out to make it look like it comes from the external address.

If your ISP owns 77.77.77.77, then you could request it but

(a) I doubt they own it and

(b) 99.9% of the time, they'll ignore these requests.

If you wanted to, you could set your private address space to 77.77.77.0/24 but it's not advisable from a security standpoint and there's no point as when it hits your router, it's only going to get translated to your external IP address anyway. No one else but you will know.

They're different from ISP to ISP, let alone country.

IP addresses are made up of 4 sets of numbers called octets.

Each octet can be in the range of 0-255 (except the first one wich is in the range of 1-255)

Read up on TCP/IP - it's puskinating stuff!

No, you can't change your IP unless you are using your own router, then you can only change your private IP.

IPs are like an address, controlled by routing tables in the routers around the world.

Way too much to explain here, so go google it.

But in a nutshell, there are real-world IPs that are always unique, and there are private IPs which are well known and reserved ranges, for use in private networks behind some kind of IP translation, usually NAT or PAT.

Way way too much of a concept to learn here, Google it.

Ok, I'll try...

When you connect to your ISP - the person you pay for your Internet, they give you an address. They have a bunch of addresses assigned to them that they dynamically rent to each of their users as and when they connect.

If you have a router, you will have an internal LAN network and external WAN. The WAN is the IP your ISP gave you.

On the internal network you will normally have an IP address like 192.168.xx.xx That group of address, as well as 10.10.xx.xx is nto routable from the internet, so is only used for internal networks.

The subnet mask dictates how many computers can be in the network. If the subnet is class C i.e 255.255.255.0, that means that all computers under 192.168.1.xx (xx being 1-254) will be able to talk to each other. If the subnet mask was 255.255.0.0, you could have more pcs in that network, and they would all need to be in the address range 192.168.xx.xx - all pc have to have the same network portion of the IP address to be able to communicate with each other.

You could give your router and internal network 77.77.77.77 if you wanted, but it wouldn't be out on the net, plus would be less secure than using 192.168.xx.xx or 10.10.xx.xx

Yes, every device on the net needs its own ip address. TCP/IP 4 is getting out of date as the addresses are running out - V4 addresses look like this: 192.168.0.1, class 6 is much longer, more like abc.123.abc.1234.abc.123 or something like that - which gives loads more addresses to use, but in general the world hasnt yet upgraded to IPv6 fully

Help? Hope so lol my fingers hurt :)

An IP address is unique, and represents an individual device.

You can't change your IP to anything you want

yes IP addresses are different from country 2 country

but they use d same structure

IP stands for internet protocol

no u cant change ur ip as u wish, sum1 may already b using it or d ip may not b compatible with ur internet service provider

Internet postage, its the computer's AND the internet service's/connects unique ID. Oh, it also includes your location.

You need to contact your service provider to change it.

You can block it, using a proxy, to keep people from tracking you using your IP.

relies upon on the working gadget. Assuming you're on WinXp you need to style "cmd" interior the "run" container of your initiate menu. that will advance a black rectangle with a command instantaneous. From there style "ipconfig" and it help you be attentive to.

Well, it is randomly given.