$7$ Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? $($Choose two.$)$

adds Ethernet control information to network protocol data

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

handles communication between upper layer networking software and Ethernet NIC hardware

applies delimiting of Ethernet frame fields to synchronize communication between nodes