Ch1 - Introduction 1-1 EEE 459 Communication Networks...

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Unformatted text preview: Introduction 1-1 EEE 459 Communication Networks Spring 2007 Prof. M. Reisslein Chapter 1 Introduction Textbook: Computer Networking: A Top Down Approach Featuring the Internet, 3 rd edition. Jim Kurose, Keith Ross Addison-Wesley. Introduction 1-2 Chapter 1: Introduction Our goal: get “feel” and terminology more depth, detail later in course approach: ❍ use Internet as example Overview: 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 Introduction 1-3 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 1-4 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 Introduction 1-5 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 ❍ RFC: Request for comments ❍ IETF: Internet Engineering Task Force local ISP company network regional ISP router workstation server mobile Introduction 1-6 What’s the Internet: a service view communication infrastructure enables distributed applications: ❍ Web, email, games, e-commerce, file sharing communication services provided to apps: ❍ Connectionless unreliable ❍ connection-oriented reliable Introduction 1-7 What’s a protocol? human protocols: “what’s the time?” “I have a question” introductions … specific msgs sent … specific actions taken when msgs received, or other events network protocols: machines rather than humans 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 Introduction 1-8 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 req TCP connection response Get http://www.awl.com/kurose-ross <file> time Introduction 1-9 Chapter 1: roadmap 1.1 What is the Internet?...
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This note was uploaded on 11/01/2009 for the course EEE 459 taught by Professor Martinreisslein during the Spring '09 term at ASU.

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Ch1 - Introduction 1-1 EEE 459 Communication Networks...

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