Question 26At which OSI layer does the PDU contain sequence and acknowledgement numbers?1 pointApplication4Data Link6

To determine at which OSI (Open Systems Interconnection) layer the Protocol Data Unit (PDU) contains sequence and acknowledgement numbers, let's break down the OSI model and identify the relevant layer:

1. Application Layer (Layer 7): This layer is responsible for network services to applications. It does not deal with sequence and acknowledgement numbers.

2. Presentation Layer (Layer 6): This layer translates data between the application layer and the network. It handles data encryption, compression, and translation, but not sequence and acknowledgement numbers.

3. Session Layer (Layer 5): This layer manages sessions or connections between applications. It establishes, manages, and terminates connections, but does not handle sequence and acknowledgement numbers.

4. Transport Layer (Layer 4)