What's a protocol? Human protocols: Network protocols: ·“what's the time?” computers(devices)rather than humans .“I have a question” all communication activity in Internet ·introductions governed by protocols ..specific messages sent Protocols define the format,order of ..specific actions taken when message received, messages sent and received among or other events network entities,and actions taken on msg transmission,receipt Introduction:1-7 What’s a protocol? Introduction: 1-7 Human protocols: ▪ “what’s the time?” ▪ “I have a question” ▪ introductions … specific messages sent … specific actions taken when message received, or other events Network protocols: ▪ computers (devices) rather than humans ▪ all communication activity in Internet governed by protocols Protocols define the format, order of messages sent and received among network entities, and actions taken on msg transmission, receipt