Chapter1 - Chapter 1 Introduction This set of slides is...

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Introduction 1-1 Chapter 1 Introduction This set of slides is extended from the textbook PowerPoint slides by Jim Kurose & Keith Ross.
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Introduction 1-2 Course Objectives You will learn: Major components of a computer network & their functionality Fundamentals of network architecture Internet network protocols/standards Useful network applications, utility programs and tools
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Introduction 1-3 Chapter 1: Introduction Our goal: get “feel” and terminology more depth, detail later in course approach: use Internet as example Overview: overview of computer networks what’s the Internet what’s a protocol? network edge network core access net, physical media Internet/ISP structure performance: loss, delay protocol layers, service models network modeling
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Introduction 1-4 Chapter 1: roadmap 1.0 Overview of computer networks 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
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Introduction 1-5 Overview of Computer Networks What is a Computer Network? Why use Computer Networks? Resource Sharing Performance Reliability Communications Different ways to connect computers together Direct-connect Connect computers in a room Connect computers within a campus or a city Connecting computers around the world
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Introduction 1-6 Types of Network – by Scale
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Introduction 1-7 Types of Network - By Applications Home Network Personal Area Network Smart Home: interconnect computers, entertainment equipments, telecomm devices, appliances, telemetry, etc. Business Network Resource sharing, Data Security Storage Area Network Virtual Private Network (VPN)
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Introduction 1-8 Types of Network – By Communication Links Wired Network Ethernet network Cable network Optical fiber network Wireless network Satellite network Cellular phone network System interconnection network (bluetooth, infrared, etc.)
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Introduction 1-9 Chapter 1: roadmap 1.0 Overview of computer networks 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
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Introduction 1-10 What’s the Internet: “nuts and bolts” view millions of connected computing devices: hosts = end systems running network apps communication links fiber, copper, radio, satellite transmission rate = bandwidth routers: forward packets (chunks of data) local ISP company network regional ISP router workstation server mobile
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Introduction 1-11 What’s the Internet: “nuts and bolts” view protocols control sending, receiving of msgs e.g., TCP, IP, HTTP, FTP, PPP Internet: “network of networks” loosely hierarchical public Internet versus private intranet Internet standards
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