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Date Submitted: 10/09/2013 04:14 AM
* 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; hosts, access net, physical media
* network core: packet/circuit switching, Internet structure
* performance: loss, delay, throughput
* Security (skip)
* protocol layers, service models
* History (skip)
* Chapter 1: roadmap
1.1 What is the Internet?
1.2 Network edge
* end systems, access networks, links
1.3 Network core
* circuit switching, packet switching, network structure
1.4 Delay, loss and throughput in packet-switched networks
1.5 Protocol layers, service models
1.6 Networks under attack: security
1.7 History
* What’s the Internet: “nuts and bolts” view
* millions of connected computing devices: hosts = end systems
* running network apps
* “Cool” internet appliances
* What’s the Internet: “nuts and bolts” view
* protocols control sending, receiving of msgs
* e.g., TCP, IP, HTTP, Skype, Ethernet
* Internet: “network of networks”
* loosely hierarchical
* public Internet versus private intranet
* Internet standards
* RFC: Request for comments
* IETF: Internet Engineering Task Force
* What’s the Internet: a service view
* communication infrastructure enables distributed applications:
* Web, VoIP, email, games, e-commerce, file sharing
* communication services provided to apps:
* reliable data delivery from source to destination
* “best effort” (unreliable) data delivery
* What’s a protocol?
network protocols:
* all communication activity in Internet governed by protocols
* Protocol comparison!!!
a human protocol and a computer network protocol:
* Chapter 1: roadmap
1.1 What is the Internet?
1.2 Network edge
* end systems, access networks, links
1.3 Network core
*...