Different Segment, packet and Frame

Packets and Frames are the names given to Protocol data units (PDUs) at different network layers
• Segments are units of data in the Transport Layer (TCP/UDP in case of the Internet)
• Packets are units of data in the Network Layer (IP in case of the Internet)
• Frames are units of data in the Link Layer (e.g. Wifi, Bluetooth, Ethernet, etc).