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1. A network hardware device that connects multiple devices on a computer network, using packet switching to forward data to the intended destination device
2. A data structure in a networking device that maps MAC addresses to physical ports.
3. A physical connector on a networking device used to connect network cables or devices.
4. A unique identifier assigned to a network interface controller (NIC) for communications at the data link layer of a network segment.
5. The process of forwarding data packets between networks or devices within a network.