What two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)

The LLC (Logical Link Control) sublayer plays a crucial role within the Data Link Layer of the OSI model by handling specific tasks that enable effective Ethernet communication. One primary function of the LLC sublayer is to identify network layer protocols. This is vital because different network layer protocols (like IP, IPX, etc.) can operate on the same physical medium. The LLC helps to delineate which protocol is being used for a particular frame by providing protocol multiplexing features.

This identification process allows the Data Link Layer to manage multiple network layer protocols simultaneously, making it essential for interoperability in networks where different protocols may be in use at the same time.

Additionally, the LLC sublayer provides a mechanism to support multiple data link protocols. While this is not one of the two chosen functions in your answer, it is worth noting that this aspect enhances flexibility and supports various types of network communication within the same environment.

In summary, the ability of the LLC sublayer to identify network layer protocols is essential for ensuring that the correct protocol is used for communication, thereby supporting the overall network functionality and interoperability.