Taking Turns"MAC protocols Polling Token passing: Master node"invites" 0 Control token passed from one slave nodes to node to next sequentially transmition turn o Token message Concerns d Concerns: Polling overhead o Token overhead ● Latency o Latency ◆ Single point of failure o Single point of failure(token (master) 5: Dat“Taking Turns” MAC protocols Polling:  Master node “invites” slave nodes to transmit in turn  Concerns:  Polling overhead  Latency  Single point of failure (master) 5: DataLink Layer 5-24 Token passing:  Control token passed from one node to next sequentially  Token message  Concerns:  Token overhead  Latency  Single point of failure (token)