Across
- 4. This layer provides for reliable delivery of packets.
- 5. This layer allows applications to request network services.
- 7. This layer establishes sessions between network applications.
Down
- 1. This layer handles routing of data across network segments.
- 2. This layer converts data so that systems that use different data formats can exchange information.
- 3. This layer provides MAC addresses to uniquely identify network nodes and a means for data to be sent over the physical layer in the form of packets. Bridges and switches are examples of devices used in this layer.
- 6. This layer governs the layout of cables and devices, such as repeaters and hubs.