Korean Job Discussion Forums

[soulofseoul]

Hi
I was thinking about this. If I use 3G and surf the internet on my galaxy S
then turn 3G off and use a wifi signal, would the person reading my IP address be totally different with no aspects of the information being the same??
Thx

[ttompatz]

[Mr. Peabody]

[soulofseoul]

What I meant was if a certain individual was trying to see your IP address.
I thought even though you had an IP address from 3G and an address from wifi being switched between on the same device, that there MAY be similar info thats viewable to determine that the addresses are coming from the same source

[ulmaeri]

When you switch networks, your IP address is going to change. But you may be thinking of the MAC id. This is a number that is used by the network interface. But switching from 3G to wifi should use a different interface and a different id. Switching wifi networks would change your IP address but keep the same MAC id.
Now since the MAC id's are supposed to be unique to each device. It is possible that the government and the teleco's have a database with each phone id and mac id's.

[soulofseoul]

[ttompatz]

[nstick13]

Was just learning about this in my certification videos, so as a form of studying I'm going to elaborate a bit.

MAC addresses specify who made the network card. They're twelve digit numbers/letters; the first six of which tell its creator (intel, broadcom, etc.)

[soulofseoul]

Ok
But for fun I switched between my 3g and wifi signals
The "internal ip" changes but the "external ip" addresses still stay the same
What are the differences between the two?

[tatertot]

[soulofseoul]

[Pangit]

If your external IP address is staying the same, then it's because it's still using the same network it initially connected to. So, if your device connects itself using Wifi, and you turn off the 3G, it doesn't matter that you've turned off the 3G, you're still connected using the Wifi. 3G and Wifi use different networks, and you will be assigned different external IP addresses.

Internal addresses are usually assigned by a network adapter, switch, router, or similar device. This is usually in the range of 192.168.0.0 to 192.168.255.255, depending on the device. Those will also change if you are switching from one connection type to another, as they tend to be randomly assigned, but they will usually start from the lowest available address, which is why you think you might still be on the same connection, but you're not. It might just be that, in both cases, you're assigned a similar number; usually 192.168.0.100 is the first one available.

I suggest you force whichever connection you want to close, to close. How you do that on your particular device, I am unsure.