Wikipedia:The Internet The Internet has no centralized governance in either technological implementation or policies for access and usage;each constituent network sets its own standards.Only the overreaching definitions of the two principal name spaces in the Internet,the Internet Protocol address space and the Domain Name System,are directed by a maintainer organization,the Internet Corporation for Assigned Names and Numbers (ICANN).The technical underpinning and standardization of the core protocols (IPv4 and IPv6)is an activity of the Internet Engineering Task Force (IETF),a non-profit organization of loosely-affiliated international participants that anyone may associate with by contributing technical expertise. Introduction 1-11
Introduction 1-11 Wikipedia: The Internet q The Internet has no centralized governance in either technological implementation or policies for access and usage; each constituent network sets its own standards. Only the overreaching definitions of the two principal name spaces in the Internet, the Internet Protocol address space and the Domain Name System, are directed by a maintainer organization, the Internet Corporation for Assigned Names and Numbers (ICANN). The technical underpinning and standardization of the core protocols (IPv4 and IPv6) is an activity of the Internet Engineering Task Force (IETF), a non-profit organization of loosely-affiliated international participants that anyone may associate with by contributing technical expertise
What's a protocol? human protocols: network protocols: ▣"what's the time?" ▣machines rather than ▣"I have a question" humans ▣introductions 口all communication activity in Internet ..specific msgs sent governed by protocols specific actions taken protocols define format, when msgs received, order of msgs sent and or other events received among network entities,and actions taken on msg transmission,receipt Introduction 1-12
Introduction 1-12 What’s a protocol? human protocols: q “ what’s the time?” q “I have a question” q introductions … specific msgs sent … specific actions taken when msgs received, or other events network protocols: q machines rather than humans q all communication activity in Internet governed by protocols protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt
What's a protocol? a human protocol and a computer network protocol: Hi ICP connection Hi requesf TCP connection Got the response time? Get http://www.awl.com/kurose-ross 4一2：00 filex time Q:Other human protocols? Introduction 1-13
Introduction 1-13 What’s a protocol? a human protocol and a computer network protocol: Q: Other human protocols? Hi Hi Got the time? 2:00 TCP connection request TCP connection response Get http://www.awl.com/kurose-ross <file> time
Wikipedia:Protocol In computing,a protocol is a set of rules which is used by computers to communicate with each other across a network.A protocol is a convention or standard that controls the information transfer between computing endpoints.In its simplest form,a protocol can be defined as the rules governing the syntax,semantics,and synchronization of communication.Protocols may be implemented by hardware,software,or a combination of the two.At the lowest level,a protocol defines the behavior of a hardware connection. Introduction 1-14
Introduction 1-14 Wikipedia: Protocol q In computing, a protocol is a set of rules which is used by computers to communicate with each other across a network. A protocol is a convention or standard that controls the information transfer between computing endpoints. In its simplest form, a protocol can be defined as the rules governing the syntax, semantics, and synchronization of communication. Protocols may be implemented by hardware, software, or a combination of the two. At the lowest level, a protocol defines the behavior of a hardware connection
Chapter 1:roadmap 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and ISPs 1.6 Delay loss in packet-switched networks 1.7 Protocol layers,service models 1.8 History Introduction 1-15
Introduction 1-15 Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and ISPs 1.6 Delay & loss in packet-switched networks 1.7 Protocol layers, service models 1.8 History