Which of the following functions are performed by the OSI Transport layer? (Select three.) ###answer### Packet formatting for delivery through a medium Media access control, logical topology, and device identification Path identification and selection Data segmentation and reassembly End-to-end flow control Reliable message delivery Consistent data formatting between dissimilar systems

Answer 1

The functions performed by the OSI Transport layer among the options provided are:

1. Data segmentation and reassembly - The Transport layer is responsible for breaking down larger messages into smaller packets for transmission and then reassembling them at the destination.

2. End-to-end flow control - The Transport layer provides mechanisms to manage the pace of data transmission between sender and receiver to prevent overwhelming either end.

3. Reliable message delivery - The Transport layer can ensure that messages are delivered reliably, often through error detection and correction mechanisms.

The other options listed are more applicable to different OSI layers:

• Packet formatting is typically done at the Data Link layer.
• Media access control and logical topology are also handled by the Data Link layer.
• Path identification and selection are associated with the Network layer.
• Consistent data formatting between dissimilar systems is mainly a concern of the Presentation layer.