Network Packet What is a Network Packet? A network packet is a small unit of data that is transmitted over a network. It contains the sender’s and receiver’s information, as well as the actual data being sent. Explanation Packets are essential for efficient data transmission, breaking down large files into manageable pieces that can be sent independently and reassembled at the destination. Practical Example of a Network Packet When you stream a video online, the content is divided into multiple packets that travel across the network and are reassembled on your device for playback.