Which layer divides each message into packets at the source and re-assembles them at the destination?

Correct option is B

The transport layer is responsible for segmenting data into packets at the sender and reassembling them at the receiver. It ensures end-to-end communication and reliability.
Information Booster
1. Segmentation and Reassembly: Data is divided into manageable segments at the source and reassembled at the destination.
2. Protocols: Includes TCP (reliable, connection-oriented) and UDP (unreliable, connectionless).
3. Responsibilities:
· Flow control to manage data rate.
· Error detection and correction for reliability.
· Multiplexing to handle multiple connections.
4. Role in OSI Model: Provides communication between applications on different devices.
Additional Knowledge
· The network layer handles routing and addressing.
· The data link layer manages frames and physical addressing.
· The physical layer transmits raw bits over the communication medium.