Preserved Topic: IP numbers

How do they work? Do my computer have one numer or several? One of my friends asked me if her sister used her computer with another sn and posted on the same board as her, would the IP number be the same? I thought we only had one but then my brother said the number changes from time to time!
I'm confused!

IP is Internet Protocol, you IP # is kinda like your social security #. It tell your ISP, Internet service provider, who you are. Most ISP's use a dynamic IP system, you get a new one most everytime that you log on, you can get a static IP that never changes.

They are used so your ISP knows where to send the information that you requested, everytime you click a link, you request info. That info is sent to your ISP and then they see that it's supposed to go the IP you have and they send it off to you.

Would a PC with a different sn, Serial Number?, have a different IP? At the same time it is impossible for 2 pc's to have the same IP, so no.

Hopefully I got everything right up there, been a while since I've taken an networking classes. If I didn't someone correct me so no one else will get confused. Thanks.

Think of the IP adress as your computer's home address... Each computer has to have a different IP address.

For example, each website has different IP address. This is so when you type in their www.something.com it goes to the right page.

There are 2 types of IP addresses.

Static IP Address - which is always the same (just like for the website)

or

Dynamic - which changes depending when you log on.

There are different classes of IP addresses... but thats another story.

When you have an IP address you can trace it where its from, who is it, and different things. It;s like a Unique number.. Dig it?

MAX

Thats Probably the best way to desribe it from an Internet standpoint.

The DNS servers at your ISP translate web addresses like www.ozonesasylum.com to a standard 4-part IP address like 208.197.16.295 that way you don't have to remember the number just the name of the site.

On a Local network the IP's of each computer must be unique must also must match to a point where they see all the other computers on that network.
To decide which part of the IP address is unique and which part stays the same you use a Subnet Mask like 255.255.255.0

Every value of the IP below and to the left of the values of the subnet mask are teh network IP and everything above and to the right is the unique computer IP.

For example with an IP of 192.168.123.100 with a subnet mask of 255.255.255.0

[192.168.123] is the networl Ip and 100 is the computers address

Compare that to your street address if I live on 145 sycamore St. Every one else on sycamore st also has that in their address but only I live at 145.

That configuration does not allow many computers it is great for small networks but it only leave room for 253 network devices with their own Up address.
On a bigger business network that wouldn't be nearly enough, but all you have to do is change the subnet mask to 255.255.0.0 then the network Ip is [192.168] and the unique computer IP is [123.100].
That leaves you with thousands of unique address and if that is not enough you can change it further to 255.0.0.0 so network IP is 192 and unique IP is [168.123.100]

In order for 2 computers on the same local network to see each other the network IP portion of the IP address must be the same.

Unless they are using WINS.


I think Ducati and I probably started typing about the same time.



[This message has been edited by Quarath (edited 03-25-2002).]

Thanks!!!

do us a favor and nuke the computer at 127.0.0.1 ....
the owner's a bitch....


Harmonizing new illusions...
ICQ: 67751342

so can anyone point me in the direction of the math that's used to generate an I{...I'm interested in there to...

Tank Yoss

In windows, select run, and type winipcfg - this will allow you to see your IP for your current session if dynamic.

if you run ics, select the icshare adapter.

as for serial numbers? there's no internal serial number on PCs unless Intel has hidden it.
P3's did have a PSN but that caused a huge privacy scandal..and if you use an NIC then a it has a unique MAC address (no relation to Apple's MAC) that can identify your putr.


[This message has been edited by ShootingStar (edited 03-26-2002).]

el_grande:
I use the exact same IP on two computers all the time, it's called ICS and it will save you a bundle on broadband costs. Sure the client will show the network IP, but all webservers will see the client and host with the same IP...that's what sharing is all about...only intelligent thing MS ever did.

Actually, ICS allows multiple machines to use the same gateway. Usually, each machine has a different internal address, and they connect to an internet connection configured on one of the machines.

Each machine will have its own address (whether corporate or home LAN) such as
192.168.0.2 and the gateway will look like 192.168.0.254 but anyone using ICS on
a client should realize that they are not anonymous..the server will pickup the
true IP of the ICS host (that's where anonymizer.com and others step in).