In the Network Layer of the OSI model, what is the protocol data unit (PDU) called?

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Study for the Certified Associate in Healthcare Information and Management Systems Exam. Utilize flashcards and multiple-choice questions with hints and explanations. Prepare effectively for your healthcare IT certification!

Multiple Choice

In the Network Layer of the OSI model, what is the protocol data unit (PDU) called?

Explanation:
At the Network Layer, the unit carried across networks is called a packet. This layer handles routing and addressing, so it takes the transport-layer segment from above, encapsulates it with its own header (like IP addresses and routing information), and forms a packet. That packet is then handed down to the Data Link Layer, which wraps it in a frame for transmission over the local link. Data units at higher layers are simply data, the Data Link Layer uses frames, and the Transport Layer uses segments, but at the Network Layer the proper term is packet.

At the Network Layer, the unit carried across networks is called a packet. This layer handles routing and addressing, so it takes the transport-layer segment from above, encapsulates it with its own header (like IP addresses and routing information), and forms a packet. That packet is then handed down to the Data Link Layer, which wraps it in a frame for transmission over the local link. Data units at higher layers are simply data, the Data Link Layer uses frames, and the Transport Layer uses segments, but at the Network Layer the proper term is packet.

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