In the world of industrial automation, the terms router, gateway, and modem are often used interchangeably, but they have distinct roles. Understanding their functions will help you choose the right device for your plant and maximize your network's efficiency.

What is a Modem?

A modem is a hardware device designed for one task only: to send traffic from point "A" to point "B," without operating on the data itself. It is not programmable, so it lacks data security services and traffic routing capabilities. A modem acts as a key for internet access; like a key, most modems cannot establish a connection without the help of software running on the device it's connected to.

What is a Router and how is it different from a Modem?

A router, on the other hand, is a more advanced device in industrial networking that allows autonomous internet access without the need for software integration on the connected device. Like a modem, it provides and manages the internet connection. However, when using a router, there is no need to use another device to control it. A router provides the internet connection on its own. Furthermore, a router provides internet access to multiple devices through multiple interfaces. A router has data routing capabilities that allow it to provide internet access to several devices at once: managing multiple interfaces and various connected devices makes routers very versatile and adaptable to various industrial environments. Another major difference between modems and routers is software functionality. Routers are usually equipped with advanced data security services like firewalls and multiple data tunneling services. These features provide extensive data security and lower the risk of cyber attacks. Overall, routers are best defined as network devices that provide a secure internet connection to multiple devices simultaneously.

What is a Gateway and how is it different from a Router and Modem?

A gateway is very similar to a router in terms of functionality, as both work autonomously and are equipped with extensive security features like firewalls and data tunneling capabilities. The main difference lies in the number of interfaces they can support. A router is designed to manage multiple interfaces, whereas a gateway is usually designed to have only one interface. Therefore, routers are intended to connect multiple devices to the internet, and gateways are intended to connect a single device, acting as a "bridge" between different communication protocols.

In conclusion: every Router is a Gateway, every Gateway is a Modem, but not the other way around. If you are looking for a secure and reliable connectivity solution for your industrial plant, explore our range of routers and gateways.