21. The standard covers the Physical layer and the Media Access Control part of the Data link layer like 802.11. 22. AX . 25 v2.0 and later occupies the data link layer , the second layer of the OSI model. 23. Any data link layer details define how application data is encapsulated ( for example for synchronization or error-correction ). 24. Service access points are also used in IEEE 802.2 Logical Link Control in Ethernet and similar Data Link Layer protocols. 25. It relies on a new, optional sublayer in the data link layer of the Open Systems Interconnection ( OSI ) model. 26. NCP provided services comparable to the Data Link Layer and Network Layer functions in the OSI model of a Wide area network. 27. However, this does not preclude Data Link Layers with an MTU smaller than IP's minimum MTU from conveying IP data. 28. Once a bridge learns the addresses of its connected nodes, it forwards data link layer frames using a layer 2 forwarding method. 29. The "'cabling system "'is a network in which a data link layer protocol can be used for communication. 30. However, it is accurate to say that the 1822 protocol incorporates the physical layer, the data link layer , and the network layer.
