Any modern company (office of a construction company, factory, online store, etc.) uses computer networks for its activities . This is due to the fact that with two or more computers in this way it is easier to transfer the necessary data between devices. This, of course, implies the management of this system. This responsible function is assumed by the network equipment.
What kind of equipment is this? It is a complex of devices that are necessary for the functioning of an organized network. This includes routers, switches, hubs, patch panels, and more. In turn, these devices are divided into active network equipment and passive. Today I want to tell you a little about the first view.
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Routing switches work already at the third level of the OSI. This makes it possible to use them as a network core. In some situations, these devices can replace routers in some ways.Now let's talk about what a router is. It is an active network equipment that operates at the third level of the OSI. Designed to provide access to the global network from the local and organizes a distributed network of the enterprise, which provides access for each employee to the necessary information. Also, with its help, you can install firewalls that will block external intrusions into the network.
Still there are such hardware screens used between networks. They are called Firewalls. They are dedicated servers on which software is installed (OSes, virtual private networks, as well as firewalls). They also provide network security and restrict access to the Internet resource with threats.