A switch is a network device that connects endpoints (e.g., workstations, servers, HMIs, PLCs, etc.) so that they can communicate and share data and resources. Switches may operate at either Layer 2 or Layer 3 of the OSI Model and intelligently forward packets across the network based on the specified address (Media Access Control (MAC) address for Layer 2 and Internet Protocol (IP) address for Layer 3). Switches are typically used to define network segments and connect the devices within a particular level of the Purdue Model.
| Name | Sectors | Description |
|---|---|---|
| Core Switch | General |
A core switch is a device that provides high-speed and reliable connectivity and can be connected with other core switches to make up the backbone of large enterprise/ICS networks. |
| Access Switch | General |
An access switch is a device that allows end users via endpoints (e.g., workstations, servers, etc.) to connect to the network and share data and resources. |
| Layer 2 Switch | General |
A Layer 2 switch is a device that forwards data packets on the network based on the specified destination MAC address. |
| Layer 3 Switch | General |
A Layer 3 switch is a device that forwards data packets on the network based on the specified source and destination IP addresses. |
| Distribution Switch | General |
A distribution switch is a device that connects access switches with core switches and is responsible for controlling traffic between networks. |