What is the difference between router and modem

What is the difference between router and modem

In this article, we understand the difference between router and modem. A modem is a device , which is used for converting analog into digital signals and vice versa. In a home network, assume that you have an internet connection which is provided by the ISP. The internet connection would be terminated on a jack on the wall. The modem would have two ports. One port would connect to the jack and the other port would typically be a RJ 45 port which is used to connect to the PC. Modems work at layer 1, which implies that they do not perform functionalities like routing etc. Routers are devices which work at layer 3 , which implies that they are capable of routing and other IP services configuration. Soho routers like ADSL routers come inbuilt with a modem as well. So an additional modem device would not be required. When a modem is used the IP address assigned by the ISP is provided only to the PC which connects to it. Additional configurations like internet sharing have to be performed on the PC for sharing internet among other users. When a router is used, internet sharing is performed on the router itself using NAT services. From a setup perspective, if there is more than one user, it is always recommended that a router is purchased instead of a modem