CSE 461: Introduction
|
|
|
- Alexander Jennings
- 5 years ago
- Views:
Transcription
1 CSE 461: Introduction Ben Greenstein [Intel Research] Jeremy Elson [Microsoft Research] Fall 2008
2 Outline Administrative trivia Goals of the course How to study networks? Instructors: Ben Greenstein, Jeremy Elson Teaching assistants: Ivan Beschastnikh: runs the sessions, manages projects Alper Sarikaya: in charge of the homeworks Office hours: 2:30-3:30 MW CSE 214 (tentative)
3 Administrative Details Everything you need is on the course web page Your TODO list: Join the mailing list if not already on it: Gain access to the CSE Labs (form for non-majors) Get Computer Networks by Peterson and Davie, 4 th Edition Read chapters 1 and 2 Go to section Obtain a Linksys WRT54GL wireless router from the TA (Ivan in CSE 391) tomorrow
4 A Network in 461 Network is clearly an overloaded word: Economic networks, regulatory networks, social networks Important networks that we care less about Nollet [1746] Morse/Cooke [1836] Telephone (Bell/Gray) [1876] Cable TV [1948] Satellites [1957]
5 A Network in 461 For 461, a network is what you get anytime you connect two or more computers together by some kind of a link. I.e., Kleinrock, Kahn, Cerf, etc. OR
6 Of particular interest: the Internet A network of networks Hierarchical structure millions of connected computing devices: hosts, end-systems pc s workstations, servers router server local ISP workstation mobile PDA s phones, toasters running network apps communication links fiber, copper, radio, satellite regional ISP routers: forward packets (chunks) of data thru network company network
7 Cool Internet Appliances IP picture frame Web-enabled toaster+weather forecaster
8 The networks we study We are interested in networks that are: Large scale Intrinsically unreliable Distributed Heterogeneous
9 The meaning of Large-scale
10 The meaning of Large-scale
11 Intrinsic Unreliability Information sent from a first place to a second May not arrive May arrive more than once May arrive in garbled fashion May arrive out of order May be read by others May be modified by others Why build intrinsically unreliable networks?
12 Distributed (Hopefully) independent failure modes Exposed and hidden dependencies A distributed system is a system in which I can t do my work because some computer has failed that I ve never even heard of. Lamport Independent administrative controls Leads to
13 Heterogeneous Networks Heterogeneous: Made up of different kinds of stuff Homogeneous: Made up of the same kind of stuff Principles Homogeneous networks are easier to deal with Heterogeneous networks have their own strengths
14 Fundamental question of this course: Given its enormous size, questionable reliability, wide-scale distribution and incredible heterogeneity, why does the Internet work? (and why, at times, does it not?) In the process of learning why, we ll cover how and what in some detail
15 Something to think about: Hasn t this been done before? Telephone network has worked well for over a century Large scale Fairly reliable Each phone call gets a dedicated circuit (reserved path through the network) Fairly centralized Ma Bell used to operate almost all networks Fairly homogenous We all have telephones Why is the Internet architected so differently?
16 Model of a Network Links carry information (bits) Wire, wireless, fiber optic, smoke signals May be point-to-point or broadcast Switches move bits between links Routers, gateways,bridges, CATV headend, PABXs, Hosts are the communication endpoints PC, PDA, cell phone, tank, toaster, Hosts have names Much other terminology: channels, nodes, intermediate systems, end systems, and much more Beware of TLA (three letter acronym) overload
17 Example Local Area Network Ethernet Hub Cable Modem PC Laptop Printer Your home network Ethernet is a broadcast-capable multi-access LAN
18 Example An Internetwork ISP 2 ISP 1 Local Net 1 Local Net 2 Internetwork is a network of networks The Internet is a global internetwork in which all participants speak a common language IP, the Internet Protocol
19 Goal of this Course You will understand how to design and build large, distributed computer networks. Fundamental problems in building networks Design principles of proven value Common implementation technologies This is a systems course, not queuing theory, signals, or hardware design. We focus on networks, and a bit on applications or services that run on top of them (distributed systems). Distributed Systems (Applications And Services) You Are Here Signals
20 How to study networks? Networks in general, and Internet in particular, are complex beasts Question: how do we begin to understand Internet s workings? Hands-on programming Tinkering, reverse-engineering the network
21 Programming Projects Develop services for a Linksys access point, including a broadcast tunnel and measurement tool WRT54GL can run Linux Develop on desktop, port to Linksys (need to cross-compile to MIPS) Programming in C Work alone, subject to the Gilligan s Island rule Each person will have a router for the quarter
22 Random Survey Do you have Internet access at home? Do you use a wireless router at home? That you can unplug at will? Have you taken OS (CSE 451)? Have you written: a program in C? A program that runs on Linux? Software for an embedded system?
23 Project Outline Phase 1: Chat with the Oracle Write the client side of a protocol to communicate with an Oracle (a server we ve written) Phase 2: Measure traffic on the wireless LAN Modify the router to keep track of the broadcast messages that are sent on the network Phase 3: Tunnel broadcasts via the Oracle Direct broadcast traffic from your network to all other students networks by way of the oracle Goal: Service sharing across networks (e.g., for itunes playlists)
24 Explore and reverse-engineer networks Residential access Modem DSL Cable modem Wireless ISP Backbone ISP ISP Campus access Ethernet FDDI Wireless The Internet is a network of networks Each individually administrated network is called an Autonomous System (AS) We can roughly divide the networks into access networks and transit networks
25 A Connectivity Exploration Tool Traceroute: Run traceroute host-name on unix machines tracert host-name on windows Sends three probes to each intermediate node on the path to the final destination (more details later) Reports the IP address, a more readable name, and the round-trip latencies for the probes
26 Traceroute to an East Coast College -bash-3.1$ traceroute planetx.scs.cs.nyu.edu traceroute to planetx.scs.cs.nyu.edu ( ), 30 hops max, 40 byte packets 1 acar-hsh-01-vlan75.cac.washington.edu ( ) ms ms ms 2 uwcr-hsh-01-vlan3904.cac.washington.edu ( ) ms ms ms 3 uwcr-hsh-01-vlan1901.cac.washington.edu ( ) ms ms ms 4 uwbr-ads-01-vlan1902.cac.washington.edu ( ) ms ms ms 5 hnsp2-wes-ge pnw-gigapop.net ( ) ms ms ms 6 abilene-pnw.pnw-gigapop.net ( ) ms ms ms 7 dnvrng-sttlng.abilene.ucaid.edu ( ) ms ms ms 8 kscyng-dnvrng.abilene.ucaid.edu ( ) ms ms ms 9 iplsng-kscyng.abilene.ucaid.edu ( ) ms ms ms 10 chinng-iplsng.abilene.ucaid.edu ( ) ms ms ms 11 buf-7600-abilene-chin.nysernet.net ( ) ms ms ms 12 nyc-gsr-buf-7600.nysernet.net ( ) ms ms ms 13 nyu-nyc-gsr.nysernet.net ( ) ms ms ms 14 WWLABGW.NYU.NET ( ) ms ms ms 15 delancy.scs.cs.nyu.edu ( ) ms ms ms 16 planetx.scs.cs.nyu.edu ( ) ms ms ms
27 Abilene I2 Backbone
28 Traceroute to a commercial webserver -bash-3.1$ traceroute traceroute to ( ), 30 hops max, 40 byte packets 1 acar-hsh-01-vlan75.cac.washington.edu ( ) ms ms ms 2 uwcr-hsh-01-vlan3904.cac.washington.edu ( ) ms ms ms 3 uwcr-hsh-01-vlan1901.cac.washington.edu ( ) ms ms ms 4 uwbr-ads-01-vlan1902.cac.washington.edu ( ) ms ms ms 5 cnsp1-wes-ge pnw-gigapop.net ( ) ms ms ms ( ) ms ms ms 7 xe r20.sttlwa01.us.bb.gin.ntt.net ( ) ms ms ms 8 ae-0.r21.sttlwa01.us.bb.gin.ntt.net ( ) ms ms ms 9 p r20.nycmny01.us.bb.gin.ntt.net ( ) ms ms ms 10 xe-4-1.r02.nycmny01.us.bb.gin.ntt.net ( ) ms ms ms 11 ge-1-1.a00.nycmny01.us.da.verio.net ( ) ms ms ms 12 * * * 13 * * * 14 * * *
29 A Commercial backbone: NTT
30 Traceroute to another commercial webserver -bash-3.1$ traceroute traceroute to ( ), 30 hops max, 40 byte packets 1 acar-hsh-01-vlan75.cac.washington.edu ( ) ms ms ms 2 uwcr-hsh-01-vlan3904.cac.washington.edu ( ) ms ms ms 3 uwcr-hsh-01-vlan1901.cac.washington.edu ( ) ms ms ms 4 uwbr-ads-01-vlan1902.cac.washington.edu ( ) ms ms ms 5 ccar1-ads-ge pnw-gigapop.net ( ) ms ms ms 6 a deploy.akamaitechnologies.com in-addr.arpa ( ) ms ms ms What is going on? -bash-3.1$ nslookup Name: a789.g.akamai.net Address: Name: a789.g.akamai.net Address:
31 Points to note Multi-homed Certain routers don t respond Variability in response times Geography not apparent Geography does not dictate paths Sometimes paths are horribly inflated. Why? Content distribution networks operate by returning a nearby cache site Reverse engineering is fun!
CSE 461: Introduction. Outline
CSE 461: Introduction Arvind Krishnamurthy Outline Administrative trivia Today: a brief introduction to the Internet: past and present Goals of the course How to study networks? Administrative Details
CSE/EE 461 Fall Introduction to Computer Communication Networks. This Lecture. 1. Administrative Stuff. Steve Gribble
CSE/EE 461 Fall 2005 Introduction to Computer Communication Networks Steve Gribble gribble@cs.washington.edu This Lecture 1. Administrative stuff 2. Introduction to Networks 3. Statistical Multiplexing
technologies you know of Networks and network
Networks and network technologies you know of The Internet Wireless (802.11) DSL and cable Powerline networks RFID 3G cellular mobile phone networks (UMTS) Old-fashioned phone network Enterprise networks,
CSE/EE 461 Computer Networks
CSE/EE 461 Computer Networks Brian Bershad Bershad@cs.washington.edu Administration Generally, check the web site Grading Final: 40% Midterm: 25% Homework: 30% Quizzes: 5% Policies Late policy: Don t be
Chapter 1. Computer Networks and the Internet
Chapter 1 Computer Networks and the Internet Internet traffic What s the Internet? (hardware) PC server wireless laptop cellular handheld wired links millions of connected computing devices: hosts = end
Chapter 1: Introduction
Chapter 1: Introduction Our goal: get context, overview, feel of networking more depth, detail later in course approach: descriptive use Internet as example Overview: what s the Internet what s a protocol?
CS 471G Friday, 11 January Introduction 2-1
CS 471G Friday, 11 January 2013 Introduction 2-1 Chapter 1 Introduction A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in
CSEN 503 Introduction to Communication Networks
CSEN 503 Introduction to Communication Networks 1-1 Mervat AbuElkheir Hana Medhat Ayman Dayf ** Slides are attributed to J. F. Kurose People and Resources 1-2 Course Name Introduction to Communication
Internet Routing. Review of Networking Principles. What s the Internet: nuts and bolts view. Communication links
Internet Routing Review of Networking Principles 1 What s the Internet: nuts and bolts view Millions of connected computing devices: hosts, end-systems PC s workstations, servers PDA s, phones, toasters
Internet Routing. Review of Networking Principles
Internet Routing Review of Networking Principles 1 What s the Internet: nuts and bolts view Millions of connected computing devices: hosts, end-systems PC s workstations, servers PDA s, phones, toasters
Router Router Microprocessor controlled traffic direction home router DSL modem Computer Enterprise routers Core routers
Router Router is a Microprocessor controlled device that forwards data packets across the computer network. It is used to connect two or more data lines from different net works. The function of the router
RSC Part I: Introduction
RSC Part I: Introduction Redes y Servicios de Comunicaciones Universidad Carlos III de Madrid These slides are, mainly, part of the companion slides to the book Computer Networking: A Top Down Approach
Switching Networks (Fall 2010) EE 586 Communication and. August 27, Lecture 2. (modified by Cheung for EE586; based on K&R original) 1-1
EE 586 Communication and Switching Networks (Fall 2010) Lecture 2 August 27, 2010 (modified by Cheung for EE586; based on K&R original) 1-1 Announcements Read Chapter 1 First homework is due 9/3 In Blackboard
Introduction. Computer Networks Term B10
Introduction Computer Networks Term B10 Introduction Outline Preliminary Definitions Internet Components Network Application Paradigms Classifying networks by transmission technology by size/scale by topology
Part 1: Introduction. Goal: Review of how the Internet works Overview
Part 1: Introduction Goal: Review of how the Internet works Overview Get context Get overview, feel of the Internet Application layer protocols and addressing Network layer / Routing Link layer / Example
EECS 228a Lecture 1 Overview: Networks. Jean Walrand
EECS 228a Lecture 1 Overview: Networks Jean Walrand www.eecs.berkeley.edu/~wlr Fall 2002 Course Information Instructor: Jean Walrand n Office Hours: M-Tu 1:00-2:00 Time/Place: MW 2:00-3:30 in 285 Cory
Announcements. TAs office hours: Mohamed Grissa: Mohamed Alkalbani:
Announcements TAs office hours: Mohamed Grissa: grissam@oregonstate.edu Tuesday: 4-5 Friday: 11-12 Mohamed Alkalbani: alkalbmo@oregonstate.edu Wednesday: 11-12 Thursday: 11-12 Lecture slides: Will be posted
Lecture 15 Networking Fundamentals. Today s Plan
Lecture 15 Networking Fundamentals Slides attributed to Neil Spring Today s Plan Talk about networking in general Layers, Routing Specifically about IP and TCP Service model, what TCP provides Work our
Computer Networking Introduction
Computer Networking Introduction Halgurd S. Maghdid Software Engineering Department Koya University-Koya, Kurdistan-Iraq Lecture No.1 Chapter 1 Introduction Text Book for this course Computer Networking:
Course on Computer Communication and Networks. Lecture 1 Chapter 1: Introduction Part A: Internet, Protocol Layering and Data
Course on Computer Communication and Networks Lecture 1 Chapter 1: Introduction Part A: Internet, Protocol Layering and Data CTH EDA344/ GU DIT 420 Based on the book Computer Networking: A Top Down Approach,
Introduction to Computer Networking II. Abdusy Syarif Informatics Department Faculty of Computer Science Universitas Mercu Buana
Introduction to Computer Networking II Abdusy Syarif Informatics Department Faculty of Computer Science Universitas Mercu Buana Teaching Method E-learning Class Individual assignment Quiz See schedule
Internet Architecture & Performance. What s the Internet: nuts and bolts view
Internet Architecture & Performance Internet, Connection, Protocols, Performance measurements What s the Internet: nuts and bolts view millions of connected computing devices: hosts, end systems pc s workstations,
IPv6 from an Abilene Perspective. Gregory Travis Indiana University
IPv6 from an Abilene Perspective Gregory Travis Indiana University greg@iu.edu What s Abilene? Physical network, sometimes known as Internet2 Internet2 is actually the collection of participating insitutitions,
Lecture 2: Internet Structure
Lecture 2: Internet Structure COMP 332, Spring 2018 Victoria Manfredi Acknowledgements: materials adapted from Computer Networking: A Top Down Approach 7 th edition: 1996-2016, J.F Kurose and K.W. Ross,
CSC 4900 Computer Networks: Introduction
CSC 4900 Computer Networks: Introduction Professor Henry Carter Fall 2017 What s this all about? 2 A Modern Day Silk Road We live with nearly constant access to the most extensive system ever built by
Prepared by Agha Mohammad Haidari Network Manager ICT Directorate Ministry of Communication & IT
Network Basics Prepared by Agha Mohammad Haidari Network Manager ICT Directorate Ministry of Communication & IT E-mail :Agha.m@mcit.gov.af Cell:0700148122 After this lesson,you will be able to : Define
Unit A - Connecting to the Network
Unit A - Connecting to the Network 1 What is a network? The ability to connect people and equipment no matter where they are in the world. telephone computers television How does your body work as a network?
Parts of a Network. app. router. link. host. Computer Networks 2
Network Components Parts of a Network app host router link Computer Networks 2 Parts of a Network app host router link Computer Networks 3 Component Names Component Function Example Application, or app,
Since enrollment is very small this semester, we have flexibilty. Traditional lecture Assigned reading, and then student(s) present during class time
Syllabus You can go to cs.rpi.edu and then Faculty and my website from my profile Or you can go to www.cs.rpi.edu/~holzbh Or to be very direct, you can go to www.cs.rpi.edu/~holzbh/ccn18/index.php 1 Textbook
Component Function Example
Network Components Component Names Component Function Example Application, or app, user Uses the network Skype, itunes, Amazon Host, or end-system, edge device, node, source, sink Router, or switch, node,
EECS 122 Communications Networks
EECS 122 Communications Networks Department of Electrical Engineering and Computer Sciences Table of Contents 1. Course Organization 2. Introduction 3. Applications/Design 4. Architecture 1 5. Models 6.
Network Protocols and Architectures
Network Protocols and Architectures Introduction 1 What s the Internet: nuts and bolts view Millions of connected computing devices: hosts, end-systems PC s workstations, servers PDA s, phones, toasters
Chapter 1 Introduction
Chapter 1 Introduction A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add, modify, and delete
Class Overview. CSE 123b Communications Software. Some hints. Some hints (2) Administrativa. Course material. Winter 2002
CSE 123b Communications Software Winter 2002 Lecture1: I ntroducti on & Re vi e w Stefan Savage Class Overview Course Material Class lectures, textbook readings, and handouts Course Assignments Homework
CS 204: Advanced Computer Networks
CS 204: Advanced Computer Networks Jiasi Chen Lectures: MWF 12:10-1pm Humanities and Social Sciences 1403 http://www.cs.ucr.edu/~jiasi/teaching/cs204_spring17/ 1 Why Networks? Supports the applications
Computer Networks and the internet. Daniel Graham Ph.D
Computer Networks and the internet Daniel Graham Ph.D 1.1 What Is the Internet? The Internet is a computer network that interconnects hundreds of millions of computing devices throughout the world. As
KIBABII UNIVERSITY COLLEGE DEPARTMENT COMPUTER SCIENCE & IT ANSWER ALL QUESTIONS IN SECTION A AND ANY TWO QUESTIONS IN SECTION B
KIBABII UNIVERSITY COLLEGE DEPARTMENT COMPUTER SCIENCE & IT TITLE: DATACOMMUNICATION COURSE CODE: 223 SECTION A: 30 Marks ANSWER ALL QUESTIONS IN SECTION A AND ANY TWO QUESTIONS IN SECTION B TIME ALLOWED:
Lesson 1: Network Communications
Lesson 1: Network Communications This lesson introduces the basic building blocks of network communications and some of the structures used to construct data networks. There are many different kinds of
Outline: Connecting Many Computers
Outline: Connecting Many Computers Last lecture: sending data between two computers This lecture: link-level network protocols (from last lecture) sending data among many computers 1 Review: A simple point-to-point
Not long ago, home local area networks were proof of their owner s geekhood. They were very
03 54473X Ch01.qxd 12/24/03 8:35 AM Page 3 Chapter 1 What Is a LAN? Not long ago, home local area networks were proof of their owner s geekhood. They were very expensive, cantankerous, difficult to set
Networks. Computer Technology
Networks Computer Technology Network Two or more computers and other devices (printers or scanners) that are connected, for the purpose of sharing data and programs Advantages of Networks Communication
Welcome to CS 340 Introduction to Computer Networking
Welcome to CS 340 Introduction to Computer ing Overview Course Administrative Trivia Internet Architecture Protocols Edge A taxonomy of communication networks Some slides are in courtesy of J. Kurose and
The Basics of Networking
c h a p t e r 3 The Basics of Networking Making the Connection lawrence snyder Times are Changing Nowhere Is Remote People are more interconnected Social interactions are changing Freedom of Seach and
Unit C - Network Addressing Objectives Purpose of an IP Address and Subnet Mask Purpose of an IP Address and Subnet Mask
1 2 3 4 5 6 7 8 9 10 Unit C - Network Addressing Objectives Describe the purpose of an IP address and Subnet Mask and how they are used on the Internet. Describe the types of IP Addresses available. Describe
ECPE / COMP 177 Fall Some slides from Kurose and Ross, Computer Networking, 5 th Edition
ECPE / COMP 177 Fall 2014 Some slides from Kurose and Ross, Computer Networking, 5 th Edition Instructor: Dr. Jeff Shafer Email: jshafer at pacific dot edu Office: Anderson 205 Office hours (posted on
Network and Mobile Compu4ng in the 20 th Century and Beyond. COMP 1400 Memorial University Winter 2015
Network and Mobile Compu4ng in the 20 th Century and Beyond COMP 1400 Memorial University Winter 2015 What s the Internet: nuts and bolts view PC server wireless laptop smartphone wireless links wired
Who is your professor? Course overview, expectations, etc. Simple network basics
CSE 123A Computer Networks Fall 2009 Lecture 1: Introduction and Overview Stefan Savage Today: short class Who is your professor? Course overview, expectations, etc Simple network basics About me I work
ECE 333: Introduction to Communication Networks Fall Lecture 1: Introduction
ECE 333: Introduction to Communication Networks Fall 2001 Lecture 1: Introduction Examples of communication networks/uses Course Goals History Classification of networks Related courses 1 Notes: This is
EEC-484/584 Computer Networks
EEC-484/584 Computer Networks Lecture 1 Department of Electrical and Computer Engineering Cleveland State University wenbing@ieee.org (Lecture nodes are based on materials supplied by Dr. Louise Moser
Chapter 1: introduction
Chapter 1: introduction our goal: v get feel and terminology v more depth, detail later in course v approach: use Internet as example overview: v what s the Internet? v what s a protocol? v edge; hosts,
Department of Computer and IT Engineering University of Kurdistan. Network Layer. By: Dr. Alireza Abdollahpouri
Department of Computer and IT Engineering University of Kurdistan Network Layer By: Dr. Alireza Abdollahpouri What s the Internet: nuts and bolts view PC server wireless laptop cellular handheld millions
Network Programming I Computer Network Design
Network Programming I Computer Network Design Flavio Esposito http://cs.slu.edu/~esposito/teaching/3650/ Lecture 2 Lecture Goals Get feel and terminology of some components of real nets More depth & details
The final exam is closed-book; you should have no materials present other than the exam and a pen or pencil.
Networked Life CSE 112 Prof. Michael Kearns Final Examination May 6, 2005 The final exam is closed-book; you should have no materials present other than the exam and a pen or pencil. NAME: PENN ID: Exam
CSEP 561 Introduction. David Wetherall
CSEP 561 Introduction David Wetherall djw@cs.washington.edu Administrivia Teaching staff: David, Yanping and Seungyeop Web: http://www.cs.washington.edu/p561/ Points to everything (mailing list, discussion
CSCI Computer Networks
CSCI-1680 - Computer Networks Chen Avin (avin) Based partly on lecture notes by David Mazières, Phil Levis, John Jannotti, Peterson & Davie, Rodrigo Fonseca Administrivia Sign and hand in Collaboration
Fundamentals of Networking Introduction to Networking Devices
Fundamentals of Networking Introduction to Networking Devices Kuldeep Sonar 1 NIC (Network Interface Card) A network interface provides connectivity from an end-user PC or laptop to the public network.
CNT 4007 Computer Networks - Chapter 1 : Overview
CNT 4007 Computer Networks - Chapter 1 : Overview Jonathan Kavalan, Ph.D. Department of Computer, Information Science and Engineering (CISE), University of Florida 1 Chapter 1: Introduction Our goal: get
Communication Networks - 3 general areas: data communications, networking, protocols
Communication Networks - Overview CSE 3213 Fall 2011 1 7 September 2011 Course Content 3 general areas: data communications, networking, protocols 1. Data communications: basic concepts of digital communications
Part I: Introduction. 1: Introduction 1
Part I: Introduction Chapter goal: get context, overview, feel of networking more depth, detail later in course approach: descriptive use Internet as example Overview: what s the Internet what s a protocol?
CS 332: Computer Networks Introduction
CS 332: Computer Networks Introduction Professor Doug Szajda Thanks! I ve taught this course many times, the most recent being Spring 2014. Each time calls for a rethinking of the topics and new material.
A Whirlwind Introduction to the Internet Overview
CS 455/555 / Spring 2013 Intro to Networks and Communications Whirlwind Introduction to the Inter (part 1) Dr. Michele C. Weigle http://www.cs.odu.edu/~mweigle/cs455-s13/ A Whirlwind Introduction to the
CS197U: A Hands on Introduction to Unix
CS197U: A Hands on Introduction to Unix Lecture 9: Network Basics J.D. DeVaughn-Brown University of Massachusetts Amherst Department of Computer Science jddevaughn@cs.umass.edu 1 Last time Subversion control
Announcements. CS 5565 Network Architecture and Protocols. Outline for today. The Internet: nuts and bolts view. The Internet: nuts and bolts view
Announcements CS 5565 Network Architecture and Protocols Lecture 2 Godmar Back Created Lectures Page Created CS5565 Forum Use this to find a project partner All projects will be done in groups of up to
Networking and Internetworking 1
Networking and Internetworking 1 Today l Networks and distributed systems l Internet architecture xkcd Networking issues for distributed systems Early networks were designed to meet relatively simple requirements
Chapter 12. Network Organization and Architecture
Chapter 12 Network Organization and Architecture Chapter 12 Objectives Learn the basic physical components of networks. Become familiar with routing protocols. 2 Computer networks are often classified
The Basics of Computer Networking. David Phenix Computing in the Modern World 1 st Period
The Basics of Computer Networking David Phenix Computing in the Modern World 1 st Period The Computer Network Arguably, the greatest advancement in technology and communication over the past 20 years has
Data Communication. Introduction of Communication. Data Communication. Elements of Data Communication (Communication Model)
Data Communication Introduction of Communication The need to communicate is part of man s inherent being. Since the beginning of time the human race has communicated using different techniques and methods.
Lecture 7: Internetworking See Chapter 3 of Colouris
95-702 Distributed Systems Lecture 7: Internetworking See Chapter 3 of Colouris Learning Goals Preamble: MISM and MSIT grads may need to plan, develop, and manage distributed systems. These distributed
Internet. Hiroshi Toyoizumi
Internet Hiroshi Toyoizumi oyoizumi@waseda.jp 1 Introduction of the Internet System of Internet What can be done using Internet Merit of Internet Technologies in the Internet Protocol Routing 2 Stand Alone
What s a protocol? What s a protocol? A closer look at network structure: What s the Internet? Hardware view: What s the Internet?
What s the Internet? Hardware view: What s the Internet? Hardware view: PC server wireless laptop cellular handheld access points wired s connected computing devices: hosts = end systems running apps communication
Chapter 3. Underlying Technology. TCP/IP Protocol Suite 1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Chapter 3 Underlying Technology TCP/IP Protocol Suite 1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. OBJECTIVES: To briefly discuss the technology of dominant
COMP 2000 W 2012 Lab no. 3 Page 1 of 11
COMP 2000 W 2012 Lab no. 3 Page 1 of 11 Lab Introduction Background The Internet is based on packet-switched protocols. Information is carried in packets (it is divided into packets), which can be imagined
Computer Networks. Computer Networks. Telecommunication Links. CMPUT101 Introduction to Computing - Spring Chapter 12: Computer Networks 1
Computer Networks Chapter 12 Topics: Communication links LAN / WAN Internet / WWW CMPUT101 Introduction to Computing (c) Yngvi Bjornsson 1 Computer Networks A computer network is a set of independent computer
Internet. Hiroshi Toyoizumi
Internet Hiroshi Toyoizumi Toyoizumi@waseda.jp 1 Introduction of the Internet System of Internet What can be done using Internet Merit of Internet Technologies in the Internet Protocol Routing 2 Stand
How does the Internet Work? The Basics: Getting a Web Page. The Basics: Getting a Web Page. Client-Server model. The Internet: Basics
How does the Internet Work? When you type a URL (Uniform Resource Locator) into a Web Browser and press Return, what do you think happens? That is, what steps do you think are required to obtain a web
end systems, access networks, links 1.3 network core
Chapter 1: roadmap 1.1 what is the Inter? 1.2 work edge end systems, works, links 1.3 work core packet switching, circuit switching, work structure 1.4 delay, loss, throughput in works 1.5 protocol layers,
Class X Subject : IT (Vocational) Chapter -1 Ouestion / Answer
Class X Subject : IT (Vocational) Chapter -1 Ouestion / Answer Q1 What is a computer network? A computer network, often simply referred to as a network, is a collection of computers and other hardware
Welcome to: Computer Science 457 Networking and the Internet. Fall 2014 Dr. Joseph Gersch
Welcome to: Computer Science 457 Networking and the Internet Fall 2014 Dr. Joseph Gersch 1 Administrivia Website: http://www.cs.colostate.edu/~cs457 For both local and remote students Syllabus, Outline,
Welcome to: Computer Science 457 Networking and the Internet. Fall 2016 Indrajit Ray
Welcome to: Computer Science 457 Networking and the Internet Fall 2016 Indrajit Ray 1 Administrivia Website: http://www.cs.colostate.edu/~cs457 For both local and remote students Syllabus, Outline, Grading
Networking Jamie Tees
Ethernet is the main networking technology, UTP (Unshielded Twisted Pair) cabling is the main networking cable types, this cabling uses RJ-45 connectors either end. While UTP is the main type we have STP
Introductions. Computer Networking Lecture 01. January 16, HKU SPACE Community College. HKU SPACE CC CN Lecture 01 1/36
Introductions Computer Networking Lecture 01 HKU SPACE Community College January 16, 2012 HKU SPACE CC CN Lecture 01 1/36 Outline What is a Computer Network? Basic Requirements of Building a Computer Network
Introduction to computer networking
edge core Introduction to computer networking Comp Sci 3600 Security Outline edge core 1 2 edge 3 core 4 5 6 The edge core Outline edge core 1 2 edge 3 core 4 5 6 edge core Billions of connected computing
Chapter 8 Networking and Digital Communication
Tomorrow s Technology and You 8/e George Beekman Michael J. Quinn Networking and Digital Communication 2008 Prentice-Hall, Inc. Slide 1 A computer network is any system of two or more computers that are
Lecture 1: Overview. EE450: Introduction to Computer Networks Professor A. Zahid. A.Zahid-EE450 1
Lecture 1: Overview EE450: Introduction to Computer Networks Professor A. Zahid A.Zahid-EE450 1 Administrative Information I EE450: Introduction to Computer Networks Lecture Hours: TTH 7:30 ~ 8:50 AM (Studio
More on Link Layer. Recap of Last Class. Interconnecting Nodes in LAN (Local-Area Network) Interconnecting with Hubs. Computer Networks 9/21/2009
More on Link Layer Kai Shen Recap of Last Class Ethernet dominant link layer technology for local-area l networks Ethernet frame structure Ethernet multiple access control CSMA/CD, exponential back-off
CS244a: An Introduction to Computer Networks
CS244a: An Introduction to Computer Networks Handout 4: Layer 3 and the Internet Protocol (IP) Nick McKeown Professor of Electrical Engineering and Computer Science, Stanford University nickm@stanford.edu
SC/CSE 3213 Winter Sebastian Magierowski York University CSE 3213, W13 L8: TCP/IP. Outline. Forwarding over network and data link layers
SC/CSE 3213 Winter 2013 L8: TCP/IP Overview Sebastian Magierowski York University 1 Outline TCP/IP Reference Model A set of protocols for internetworking The basis of the modern IP Datagram Exchange Examples
What s a protocol? What s a protocol? A closer look at network structure: What s the Internet? What s the Internet? What s the Internet?
What s the Internet? PC server laptop cellular handheld access points wired s connected computing devices: hosts = end systems running apps communication s fiber, copper, radio transmission rate = bandwidth
Basics of datacommunication
Data communication I Lecture 1 Course Introduction About the course Basics of datacommunication How is information transported between digital devices? Essential data communication protocols Insight into
Where we are in the Course
Network Layer Where we are in the Course Moving on up to the Network Layer! Application Transport Network Link Physical CSE 461 University of Washington 2 Network Layer How to connect different link layer
Overview on the Internet the current and future telecommunication network
Overview on the Internet the current and future telecommunication network Computer Networking: A Top Down Approach, 5 th edition. Jim Kurose, Keith Ross Addison-Wesley, April 2009. Introduction 1-1 Introduction
Outline. TCP/IP Internet
Outline Major Internet components Network architecture and protocols Switching strategies Internet protocol stack, history to network performance TCP/IP Internet Motivations Most networks are established
Chapter 6 The Internet
Chapter The Internet Computer Concepts 2014 Chapter Contents Section A: Internet Technology Section B: Fixed Internet Access Section C: Portable and Mobile Internet Access Section D: Internet Services
Network Layer (1) Networked Systems 3 Lecture 8
Network Layer (1) Networked Systems 3 Lecture 8 Role of the Network Layer Application Application The network layer is the first end-to-end layer in the OSI reference model Presentation Session Transport
What this Course is NOT About. What this Course Covers. What this Course Covers. Computer Networks. Lecture 1: Introduction to.
What this Course is NOT About Computer Networks Lecture 1: Introduction to Computer Networks and to Course We do NOT cover: Homepage design, CSS, PGP, MySQL Photoshop, Flash, Silverlight Web site administration
Identify the features of network and client operating systems (Windows, NetWare, Linux, Mac OS)
Course Outline Network+ Duration: 5 days (30 hours) Learning Objectives: Install and configure a network card Define the concepts of network layers Understand and implement the TCP/IP protocol Install
CSC Introduction to Computers and Their Applications. Background
CSC 170 - Introduction to Computers and Their Applications Lecture 7 The Internet Background The history of the Internet begins in 1957. In a response to the Soviet Union launching Sputnik, the first man-made
CS321: Computer Networks Introduction to Computer Networks and Internet
CS321: Computer Networks Introduction to Computer Networks and Internet Dr. Manas Khatua Assistant Professor Dept. of CSE IIT Jodhpur E-mail: manaskhatua@iitj.ac.in What is Data Communication? Data communications
Full file at
Guide to Networking Essentials, Sixth Edition 2-1 Chapter 2 Network Hardware Essentials At a Glance Instructor s Manual Table of Contents Overview Objectives Tips Quick Quizzes Class Discussion Topics
Communications Software. CSE 123b. CSE 123b. Spring Lecture 1: Introduction & Review. Stefan Savage.
CSE 123b CSE 123b Communications Software Spring 2003 Lecture 1: Introduction & Review Stefan Savage Stefan Savage savage@cs.ucsd.edu Class Overview Course Material Class lectures, textbook readings, and