3. What’s the difference between a modem, a router, and a gateway?
A modem is a device that lets another device transmit data over the Internet. A modem converts digital information from a computer into packets that can be transmitted over the communication infrastructure.
A router is a device that is used to connect multiple devices to a network. In a home network, a router is used to connect multiple devices to the Internet without a dedicated connection for each device. Typically, multiple devices send data to the router, and the router then sends the information to a modem.
Data from the Internet is received by the modem, which sends the data to the router. The router examines the data and then sends the data to the appropriate device on the network based on the IP address in the data.
A gateway is similar to a router except for a few key differences. The most significant difference between a gateway and a router is that a gateway is a stand-alone device and a router other is not. A router requires a connection to a cable or DSL modem to allow Internet access. A gateway is essentially a modem and a router combined into one device, and it does not need a modem to connect to the Internet.
How do I tell if I have a modem or a gateway?
If you aren’t sure whether the device in your home network is a modem or a gateway, there are a few clues to look for:
Visually inspect the labels on the devices. If the type of device is not explicitly labeled on the device, a manufacturer name or model number may help you determine the type of device.
Most gateways have wireless capabilities, modems do not. If you have a wireless signal from a device that is connected to your cable or DSL to allow Internet access, then you most likely have a gateway.
If you have multiple physical ports on the device that is connected to your cable or DSL to allow Internet access, then you most likely have a gateway.
If these suggestions do not help you quickly determine whether you have a modem or gateway, then you can review the manufacturer documentation that came with device or contact your ISP.