Hi, I have been using computers for a while now and I just realized that I dont know something as simple as IP addresses. Im correctly connecting my Notebook, my iPhone and a PC laptop to the same routing (wirelessly) and a few times I have seen a message in my Notebook saying that another device is already using the same IP address, Im assuming is my iPhone but to really find this out I would like to have a better understanding as to how IP addresses are assign to this devices when connected to a router, if Im not mistaking each device should have its own unique IP address and if this is true how in the world these two devices are interfering with each other. Can someone help me understand how IP addresses work? Something like 1- What is an IP address? 2- How routers communicate to clients? 3- Does the router assigns unique IP address to all devices connected to it, or it uses the device's IP to communicate? Can someone be so kind and explain this a little bit or direct me to where I can find these basics. Thanks a lot.