Switches are essential networking devices that connect multiple devices within a local area network. How they work - They operate at the data link layer (Layer 2), forwarding data packets based on MAC addresses. - This MAC based forwarding helps ensure data reaches the correct device efficiently. Key benefits - Improve network performance by reducing collisions and providing dedicated bandwidth for each connected device. - Support scalable networking as your device count grows, through multiple port densities. - Offer predictable, reliable connectivity for all connected devices in a LAN. Port options and scalability - Available in various port densities to connect different numbers of devices. - Port densities let you tailor the switch to the size of your network, from small setups to larger, more complex configurations. Managed switches for greater control - Managed switches include features such as VLAN configuration, port security, and traffic monitoring. - VLAN configuration enables logical segmentation of the network to improve security and performance. - Port security helps protect devices on the network by restricting access at the switch port. - Traffic monitoring provides visibility into network usage and performance, supporting proactive management. Why you need a switch - Centralizes device connectivity within a LAN, ensuring reliable data transfer and organized network topologies. - Enables segmentation and security controls through VLANs and port security. - Provides visibility into traffic patterns, aiding in troubleshooting and capacity planning. Use scenarios - Small office network: connect computers, printers, and IP phones with a switch that supports VLANs to separate employee traffic from guest traffic while maintaining performance and security. - Home lab or testing environment: run multiple devices for experiments or demonstrations, using VLANs and traffic monitoring to observe network behavior and verify configurations. - Retail or small business environment: connect point-of-sale terminals, cameras, and back-office systems, applying VLANs for device separation and using port security and monitoring for security and reliability. Notes - Function and performance are aligned with standard Layer 2 switching principles. - Port densities are designed to accommodate a range of devices and LAN sizes. - Managed switch features provide enhanced control, security, and visibility for effective network management.