In a network setup, what is the main role of a switch?

A switch primarily serves the role of connecting multiple devices within a network, allowing them to communicate with each other. It operates at the data link layer (Layer 2) of the OSI model and uses MAC addresses to forward data to the appropriate devices. This facilitates efficient data transmission and reduces network collisions compared to older technologies like hubs, which broadcast data to all devices.

While switches can have additional features, such as VLAN support and some basic security measures, their fundamental function is to create a local area network (LAN) by interlinking various devices, such as computers, printers, and servers. This connectivity allows devices to share resources and communicate effectively.

Internet access is typically provided by routers, which connect a local network to the wider internet. IP address assignment is the responsibility of services like DHCP (Dynamic Host Configuration Protocol), generally handled by routers or dedicated DHCP servers. Security involves a broader set of practices and tools, including firewalls and intrusion detection systems, and while some switches may incorporate basic security features, they are not primarily designed for this purpose.