Which PDU format is used when bits are received from the network medium by the NIC of a host?

Question:
Which PDU format is used when bits are received from the network medium by the NIC of a host?

• file
• frame
• packet
• segment

Explanation: When received at the physical layer of a host, the bits are formatted into a frame at the data link layer. A packet is the PDU at the network layer. A segment is the PDU at the transport layer. A file is a data structure that may be used at the application layer.

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