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In Networking, several key devices play essential roles ensuring communication between systems. A router is one of the most important, as it connects different networks together such as a home or a business network to the internet. Routers determine the best path for data packets and often provide additional services like assigning IP addresses through DHCP and basic security through firewall functions. A switch operates mainly within a local aera network which is LAN. It forwards data directly to the intended device using MAC addresses, which reduces unnecessary network traffic and increase efficiency. Switches are crucial for allowing multiple devices, such as computers and printers, to communicate seamlessly on the same network. An access point extends the wired network into a wireless environment, allowing mobile devices like phones and laptops to connect without cables. Access points also improve coverage in larger areas, ensuring reliable communication across the network.