Router, Little managers that check if the packages are going the right way., Header, Contains information for routers to track source and destination. Essential for reconstructing the original message when multiple packets arrive at the destination., Payload, Carries all the actual data. (Must remember: It's like a puzzle piece! It won't be complete till all the pieces are arranged in the right order.), Trailer, Tells the receiving device that there is no more to come. Its done, don't expect more., Packet Switching, It's a way to transmit data. They send its in different routes. It's like a road, there's traffic. It may arrive in the wrong order and slightly different times..

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