Which two functions does the LLC sublayer of the OSI Data Link Layer perform for Ethernet communication?

Which two functions does the LLC sublayer of the OSI Data Link Layer perform for Ethernet communication?

• A. Enables IPv4 only and encapsulates TCP
• B. Enables IPv4 and IPv6 to share the physical medium
• C. Detects errors and establishes connections
• D. Translates IP addresses into MAC addresses

Answer: (B)

The LLC (Logical Link Control) sublayer of the OSI Data Link Layer is responsible for several key functions that facilitate communication over a network medium. One of its primary roles is to provide a way for different network layer protocols, such as IPv4 and IPv6, to operate over the same physical medium. This enables multiple network protocols to coexist and ensures that data is correctly framed and transmitted regardless of the network layer protocol being used. In this context, the capability for IPv4 and IPv6 to share the physical medium highlights the LLC's function of abstracting the network layer protocols from the physical transmission details. This allows devices on the network to communicate effectively without needing to be concerned about the specifics of the underlying protocol in use at the network layer. The other functions or choices do not accurately represent the roles of the LLC sublayer. For example, the functions of error detection and connection establishment are typically handled at other layers or by different protocols, such as the transmission control protocol (TCP) at the transport layer. Additionally, the translation of IP addresses to MAC addresses is managed by protocols like ARP (Address Resolution Protocol) and is not a function of the LLC sublayer. Understanding the specific role of the LLC sublayer clarifies its

The LLC (Logical Link Control) sublayer of the OSI Data Link Layer is responsible for several key functions that facilitate communication over a network medium. One of its primary roles is to provide a way for different network layer protocols, such as IPv4 and IPv6, to operate over the same physical medium. This enables multiple network protocols to coexist and ensures that data is correctly framed and transmitted regardless of the network layer protocol being used.

In this context, the capability for IPv4 and IPv6 to share the physical medium highlights the LLC's function of abstracting the network layer protocols from the physical transmission details. This allows devices on the network to communicate effectively without needing to be concerned about the specifics of the underlying protocol in use at the network layer.

The other functions or choices do not accurately represent the roles of the LLC sublayer. For example, the functions of error detection and connection establishment are typically handled at other layers or by different protocols, such as the transmission control protocol (TCP) at the transport layer. Additionally, the translation of IP addresses to MAC addresses is managed by protocols like ARP (Address Resolution Protocol) and is not a function of the LLC sublayer.

Understanding the specific role of the LLC sublayer clarifies its