MCQ Detailed View

A segment is a piece of data that the Transport Layer prepares for delivery across the network. When an application sends data, the Transport Layer breaks it into smaller chunks called segments. These segments are then passed to the Network Layer for further processing and delivery.

The segmentation process helps in managing large amounts of data by breaking it down into manageable units. Each segment contains not only a portion of the actual data but also important control information like sequence numbers and acknowledgment numbers. This ensures reliable communication between the sender and the receiver.

Key points about segments:

• Used at the Transport Layer (Layer 4).


• Contain control information for reliable delivery.


• Form the basis of communication in protocols like TCP.

Conclusion: The correct answer is Segment. It is the data unit used by the Transport Layer to ensure accurate and reliable transmission of data between devices.