Implementation Manager (IM) Specialist CHTS Practice Test

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What is the primary data unit handled by the Network Layer?

Frames
Packets
Segments
Bits

The correct answer is: Packets

The primary data unit handled by the Network Layer is packets. This layer is responsible for routing data from the source to the destination across multiple networks, and it does this by encapsulating data into packets. Each packet contains not only the data being sent but also the necessary addressing information that allows routers to determine where the packet should be forwarded in the network. In contrast, frames are the data units used at the Data Link Layer, which operates below the Network Layer. Segments are the units of data handled at the Transport Layer, which is higher in the stack than the Network Layer and primarily deals with ensuring complete data transfer and reliability. Bits represent the lowest level of data and are handled in the physical layer of the OSI model. Thus, packets are uniquely significant to the Network Layer's function in ensuring that data can travel from one network node to another effectively.