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

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

• handles communication between upper layer networking software and Ethernet NIC hardware
• implements trailer with frame check sequence for error detection
• places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
• implements a process to delimit fields within an Ethernet 2 frame
• adds Ethernet control information to network protocol data

Case 2:

• places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
• adds Ethernet control information to network protocol data
• responsible for internal structure of Ethernet frame
• enables IPv4 and IPv6 to utilize the same physical medium
• implements trailer with frame check sequence for error detection

Case 3:

• integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper
• enables IPv4 and IPv6 to utilize the same physical medium
• handles communication between upper layer networking software and Ethernet NIC hardware
• adds Ethernet control information to network protocol data
• implements CSMA/CD over legacy shared half-duplex media

Case 4:

• applies delimiting of Ethernet frame fields to synchronize communication between nodes
• places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
• adds Ethernet control information to network protocol data
• implements trailer with frame check sequence for error detection
• handles communication between upper layer networking software and Ethernet NIC hardware

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