Is there any other type of internet connection besides dial up which causes your IP# to change?

Question

Of course I know that all IP#s can change at some point. I don't know very much about it, but I know the ISP changes your IP# occasionally whether you have broadband via cable, broadband via satellite, or whatever. But what I'm asking is if there is any other type of service besides dial up which causes your IP# to change each time you sign onto the internet. I want to say no, but, since I don't know much about this sort of thing, I was thinking that there might be another type of internet service which causes this that I don't know about. The reason I'm asking is because I want to know if it's safe to assume that someone has dial up when I check the IP# repeatedly and find that the last two numbers are always different... or if it's possible that the person could indeed have another type of connection.

Ok, I think I understand what you're saying, at least to a certain extent. But isn't it true that, if you have dial up, the computer gets a new IP # each and every time it "dials" back onto the internet?

Answer 1

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Answer 2

A lot depends on your isp. I have had a connection where I had a static (fixed) ip address. I currently have cable where its DHCP which means it changes. If your service provider gives you an ip address when you sign up, you have a static ip; otherwise you have an ip that changes (DHCP) To find out how your computer is configured, go to your start menu, control panel, and internet connection. Click the connection settings tab at the top. If it says optain an ip address automatically, you have DHCP. If it says use the following ip address, you have a static or fixed ip.

Answer 3

you can usually change your ip address everytime.

What happens is when you connect to your broadband and you ip address is given, your network connection (either wired or wireless) usually has something called a MAC address. It's kinda like a serial number. Now if you change that serial number you usually get a different IP address.

Now for people in the know you can't really change a MAC address unless your behind a router, if your not behind a router there is a little program called MACSHIFT

http://devices.natetrue.com/macshift/

This will allow windows to change your MAC address for your internet connection and hence you get a new IP address.

This program uses the Command line so if your unsure of how to use it then email me at radicalfunscout @ yahoo . com (remove the spaces)

Answer 4

Pretty much all ISPs use DHCP to dynamically assign IP addresses to their users, regardless of whether the connection is dialup, DSL, cable, ISDN, etc.

After your modem connects to your ISP, it broadcasts a DHCP request to the ISP to obtain an IP address and also the gateway and DNS server settings it needs to properly configure the network connection. The ISP's DHCP server will respond with this information. The assigned IP address is "leased" to the connection. At the expiration of the lease your computer will make another DHCP request to get another IP address. It may get the same or a different address.

DHCP also allows for static assignment of IP addresses by MAC address. Some ISPs allow you to pay extra for a static IP address.

If you don't have a static IP address you can use a free dynamic DNS service to provide a fixed hostname that will always resolve to your current IP DHCP assigned IP address. Basically you run a dynamic DNS client on your PC and it checks your assigned IP address periodically. When it changes it sends an update to the dynamic DNS service which updates its DNS servers.

One of the most populare dynamic dns services is http://www.dyndns.org.

If you have a broadband router then your router will most likely also be acting as a DHCP server to your PC. That is, it will use DHCP to get its IP address from your ISP (WAN IP address) and your PC will use DHCP to get its IP address (LAN IP address) from the router. The router will have two addresses :- the WAN IP address that it uses when it talks to your ISP and a LAN IP address that it uses when it talks to your PC.

Answer 5

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