DATA LINK LAYER (LAYER 2)
REPACKAGES BITS FROM LAYER 1 INTO FRAMES AND TRANSMITS THEM ACROSS THE NETWORK
MEDIA ACCESS CONTROL (MAC) ADDRESS
MEANS FOR IDENTIFYING A DEVICE PHYSICALLY AND ALLOWING IT TO OPERATE ON A LOGICAL TOPOLOGY
LOGICAL LINK CONTROL (LLC)
Limits data sent by a sender and prevents receiver overwhelm and allows the receiver to acknowledge getting the message
ISOCHRONOUS MODE
COMMUNICATION METHOD WHERE NETWORK DEVICES USE A COMMON REFERENCE CLOCK AND HAVE TIME SLOTS FOR TRANSMISSION
ASYNCHRONOUS
NETWORK DEVICES REFERENCE INTERNAL CLOCKS AND USE START AND STOP BITS FOR SYNCHRONIZATION
SYNCHRONOUS
DEVICES USE THE SAME CLOCK WITH BEGINNING AND ENDING FRAMES AND CONTROL CHARACTERS FOR SYNCHRONIZATION
SWITCHES
SMART HUBS THAT USE LOGIC TO SEND DATA TO SPECIFIC DEVICES USING MAC ADDRESSES
NETWORK BRIDGE
A DEVICE THAT CONNECTS TWO OR MORE NETWORK SEGMENTS FILTERING DATA BY MAC ADDRESSES