Introduction1-1 Course Code:EE/TE533 Instructor: Muddathir Qamar.

Slides:

Advertisements

Similar presentations

Introduction 2 1: Introduction.

Advertisements

James 1:5 If any of you lacks wisdom, he should ask God, who gives generously to all without finding fault, and it will be given to him.

1 Computer Networks and Communications [Δίκτυα Υπολογιστών και Επικοινωνίες] Lectures 2&3: What is the Internet? Univ. of the Aegean Financial and Management.

Introduction 1-1 Chapter 1 Introduction slides are modified from J. Kurose & K. Ross CPE 400 / 600 Computer Communication Networks Lecture 2.

Aleksandar, Accounts have been created for any students in EECS 340 who did not already have one. Physical access to the labs has also been granted. If.

Introduction1-1 Introduction to Computer Networks Our goal:  get “feel” and terminology  more depth, detail later in course  approach:  use Internet.

Introduction1-1 Chapter 1: Introduction  get context, overview, “feel” of networking  more depth, detail later in course  approach: m descriptive m.

Introduction1-1 Communication Systems Lecturer Dr. Marina Kopeetsky Lecture 1: Introduction Computer Networking: A Top Down Approach Featuring the Internet,

Welcome to CS 340 Introduction to Computer Networking.

Lecture 1 Internet Overview: roadmap 1.1 What is the Internet? 1.2 Network edge  end systems, access networks, links 1.3 Network core  network structure,

CS 325 Computer Networks Sami Rollins Fall 2003.

Lecture Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge  end systems, access networks, links 1.3 Network core  network structure,

Winter 2008Introduction1 What’s a Network: Key Features  Providing certain services  transport goods, mail, information or data  Shared resources 

1-1 Foundation Objectives: 1.1 What’s the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and.

Introduction1-1 Chapter 1: Introduction Our goal:  get “feel” and terminology  more depth, detail later in course  approach: m use Internet as example.

1 Day 01 - The Internet. 2 Chapter 1 Introduction Computer Networking: A Top Down Approach Featuring the Internet, 3 rd edition. Jim Kurose, Keith Ross.

1: Introduction1 Part I: Introduction Chapter goal: r get context, overview, “feel” of networking r more depth, detail later in course r approach: m descriptive.

Networking Based on the powerpoint presentation of Computer Networking: A Top Down Approach Featuring the Internet, Third Edition, J.F. Kurose and K.W.

Lecture 1 Overview: roadmap 1.1 What is computer network? the Internet? 1.2 Network edge  end systems, access networks, links 1.3 Network core  network.

Introduction1-1 Chapter 1: Introduction Our goal:  get context, overview, “feel” of networking  more depth, detail later in course  approach: m descriptive.

Introduction1-1 CS 325 Computer Networks Sami Rollins Fall 2005.

What’s the Internet: “nuts and bolts” view

1-1 CS 456 – Computer Networks □ Instructor: Ian Goldberg □ Classes: Tuesday and Thursday 8:30 – 9:50am MC 4063 (section.

1: Introduction1 Part I: Introduction Goal: r get context, overview, “feel” of networking r more depth, detail later in course r approach: m descriptive.

Chapter 1 Introduction Computer Networking: A Top Down Approach 6th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 A note on the use of these.

Computer Networking Introduction, Part I. Lecture #1: Part I: Introduction Chapter goal: get context, overview, “feel” of networking.

Introduction1-1 Chapter 1: Introduction Our goal:  get “feel” and terminology  more depth, detail later in course  approach:  use Internet as example.

RSC Part I: Introduction Redes y Servicios de Comunicaciones Universidad Carlos III de Madrid These slides are, mainly, part of the companion slides to.

Introduction Chapter 1 Introduction Computer Networking: A Top Down Approach Featuring the Internet, 3 rd edition. Jim Kurose, Keith Ross Addison-Wesley,

Introduction 1-1 Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge  end systems, access networks, links 1.3 Network core  circuit switching,

Slides originally from Professor Williamson at U Calgary1-1 Introduction Part II  Network Core  Delay & Loss in Packet-switched Networks  Structure.

Sharif University of Technology, Kish Islan Campus 1 Internet networking basics These power point slides have been adapted from slides prepared by authors.

Instructor: Christopher Cole Some slides taken from Kurose & Ross book IT 347: Chapter 1.

Introduction 1-1 Chapter 1: Introduction Our goal:  get “feel” and terminology  more depth, detail later in course  approach:  use Internet as example.

CS 3214 Computer Systems Godmar Back Lecture 23. Announcements Project 5 due Dec 8 Exercise 10 handed out Exercise 11 coming before Thanksgiving CS 3214.

Introduction1-1 Part of slides provided by J.F Kurose and K.W. Ross, All Rights Reserved Chapter 1 Computer Networks and the Internet Computer networking.

Introduction Switches and Access. 2 Chapter 1 Introduction Computer Networking: A Top Down Approach Featuring the Internet, 5 rd edition. Jim.

RSC Part I: Introduction Redes y Servicios de Comunicaciones Universidad Carlos III de Madrid These slides are, mainly, part of the companion slides to.

Ch 1. Computer Networks and the Internet Myungchul Kim

1 End-user Protocols, Services and QoS. 2 Layering: logical communication application transport network link physical application transport network link.

Introduction1-1 Data Communications and Computer Networks Chapter 1 CS 3830 Lecture 1 Omar Meqdadi Department of Computer Science and Software Engineering.

Basic Concepts of Internet Technology What is a computer network? Isolated computers vs. networked computers internetworking The Internet What’s a protocol?

Introduction 1-1 Networking Admin  1 to 4 lectures a week for 11 weeks for a total of 23 lectures  Interleaves with Functional Programming  First prac.

1 Network Core and Network Edge By Muhammad Hanif To BS IT 4 th Semester.

Introduction1-1 Chapter 1 Computer Networks and the Internet Computer Networking: A Top Down Approach Featuring the Internet, 2 nd edition. Jim Kurose,

Introduction1-1 Chapter 1 Computer Networks and the Internet Computer Networking: A Top Down Approach Featuring the Internet, 2 nd edition. Jim Kurose,

Computer Networking II Course Outline - introduction -Network Layer -Wireless and Mobile Networks -Multimedia Networking -Network Management -Network Security.

Introduction1-1 Computer Network (  Instructor  Ai-Chun Pang 逄愛君, m Office Number: 417  Textbook.

Chapter 1, slide: 1 Summer 2010 CS 372 Introduction to Computer Networks* Monday, June 21, 2010 School of Electrical Engineering and Computer Science Oregon.

1: Introduction1 Internet Services and Protocols Adapted from “Computer Networking: A Top Down Approach Featuring the Internet” Kurose and Ross, Addison.

Introduction 1-1 1DT057 Distributed Information Systems Chapter 1 Introduction.

CSEN 404 Introduction to Networks Amr El Mougy Lamia AlBadrawy.

Introduction1-1 Data Communications and Computer Networks Chapter 1 CS 3830 Lecture 3 Omar Meqdadi Department of Computer Science and Software Engineering.

1 Ram Dantu University of North Texas, Practical Networking.

CS 5565 Network Architecture and Protocols

Graciela Perera Introduction Graciela Perera

CS 3214 Computer Systems Networking.

Day 01 - The Internet.

Part 0: Networking Review

Slides taken from: Computer Networking by Kurose and Ross

Chapter 1: Introduction

CS 3214 Computer Systems Lecture 21 Godmar Back.

An Aleksandar, Accounts have been created for any students in EECS 340 who did not already have one. Physical access to the labs has.

CS 3214 Computer Systems Networking.

Introduction 1 1: Introduction.

CS 5565 Network Architecture and Protocols

Chapter 1: Introduction

Chapter 1: Introduction

Part I: Introduction Overview: what’s the Internet what’s a protocol?

Comp 410 AOS Packet Switching

Presentation transcript:

Introduction1-1 Course Code:EE/TE533 Instructor: Muddathir Qamar

Introduction1-2 Reference Books: Computer Networking : A Top-Down Approach Featuring the Internet (3rd Edition) by James F. Kurose, Keith W. Ross RTP: Audio and Video for the Internet by Colin Perkins

Introduction1-3 Brief Outline: Introduction, Internet Protocols & Network Core, Internet Backbone and access, Networking Applications Multicast, Multimedia Networking & Properties of Real-Time Services –RTP Internet Telephony H.323, SIP, ENUM, SoftswitchQOS (Resource Reservation, Differentiated Services and MPLS) (Midterm)Local Area Networks, Optical Networks (Ethernet/Wireless/Sonet) Access TechnologiesWireless and Mobility Storage Area Network / Metro EthernetPOS/ FTTH/ Web- CachingSecurity, Firewall, Intrusion Prevention E-BusinessStudent Presentations

Introduction1-4 Chapter 1: Introduction Overview:  what’s the Internet  what’s a protocol?  network edge  network core  Internet/ISP structure

Introduction1-5 Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Internet structure and ISPs 1.5 Protocol layers, service models 1.8 History

Introduction1-6 What’s the Internet:  millions of connected computing devices: hosts = end systems  running network apps  communication links m fiber, copper, radio, satellite m transmission rate = bandwidth  routers: forward packets (chunks of data) local ISP company network regional ISP router workstation server mobile

Introduction1-7 What’s the Internet:  protocols control sending, receiving of msgs m e.g., TCP, IP, HTTP, FTP, PPP  Internet: “network of networks” m loosely hierarchical m public Internet versus private intranet  Internet standards m RFC: Request for comments m IETF: Internet Engineering Task Force local ISP company network regional ISP router workstation server mobile

Introduction1-8 What’s the Internet: a service view  communication infrastructure enables distributed applications: m Web, , games, e- commerce, file sharing  communication services provided to apps: m Connectionless unreliable m connection-oriented reliable

Introduction1-9 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

Introduction1-10 What’s a protocol? a human protocol and a computer network protocol: Q: Other human protocols? Hi Got the time? 2:00 TCP connection req TCP connection response Get time

Introduction1-11 Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Internet structure and ISPs

Introduction1-12 Network structure:  network edge: applications and hosts  network core: m routers m network of networks  access networks, physical media: communication links

Introduction1-13 The network edge:  end systems (hosts): m run application programs m e.g. Web, m at “edge of network”  client/server model m client host requests, receives service from always-on server m e.g. Web browser/server; client/server  peer-peer model: m minimal (or no) use of dedicated servers m e.g. Gnutella, KaZaA

Introduction1-14 Connection-oriented service Goal: data transfer between end systems  handshaking: setup (prepare for) data transfer ahead of time m Hello, hello back human protocol m set up “state” in two communicating hosts  TCP - Transmission Control Protocol m Internet’s connection- oriented service TCP service [RFC 793]  reliable, in-order byte- stream data transfer m loss: acknowledgements and retransmissions  flow control: m sender won’t overwhelm receiver  congestion control: m senders “slow down sending rate” when network congested

Introduction1-15 Connectionless service Goal: data transfer between end systems m same as before!  UDP - User Datagram Protocol [RFC 768]: m connectionless m unreliable data transfer m no flow control m no congestion control App’s using TCP:  HTTP (Web), FTP (file transfer), Telnet (remote login), SMTP ( ) App’s using UDP:  streaming media, teleconferencing, DNS, Internet telephony

Introduction1-16 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

Introduction1-17 The Network Core  mesh of interconnected routers  the fundamental question: how is data transferred through net? m circuit switching: dedicated circuit per call: telephone net m packet-switching: data sent thru net in discrete “chunks”

Introduction1-18 Network Core: Circuit Switching End-end resources reserved for “call”  link bandwidth, switch capacity  dedicated resources: no sharing  circuit-like (guaranteed) performance  call setup required

Introduction1-19 Network Core: Circuit Switching network resources (e.g., bandwidth) divided into “pieces”  pieces allocated to calls  resource piece idle if not used by owning call (no sharing)  dividing link bandwidth into “pieces” m frequency division m time division

Introduction1-20 Circuit Switching: FDM and TDM FDM frequency time TDM frequency time 4 users Example:

Introduction1-21 Network Taxonomy Telecommunication networks Circuit-switched networks FDM TDM Packet-switched networks Networks with VCs Datagram Networks Datagram network is not either connection-oriented or connectionless. Internet provides both connection-oriented (TCP) and connectionless services (UDP) to apps.

Introduction1-22 Internet structure: network of networks  roughly hierarchical  at center: “tier-1” ISPs (e.g., UUNet, BBN/Genuity, Sprint, AT&T), national/international coverage m treat each other as equals Tier 1 ISP Tier-1 providers interconnect (peer) privately NAP Tier-1 providers also interconnect at public network access points (NAPs)

Introduction1-23 Tier-1 ISP: e.g., Sprint Sprint US backbone network

Introduction1-24 Internet structure: network of networks  “Tier-2” ISPs: smaller (often regional) ISPs m Connect to one or more tier-1 ISPs, possibly other tier-2 ISPs Tier 1 ISP NAP Tier-2 ISP Tier-2 ISP pays tier-1 ISP for connectivity to rest of Internet  tier-2 ISP is customer of tier-1 provider Tier-2 ISPs also peer privately with each other, interconnect at NAP

Introduction1-25 Internet structure: network of networks  “Tier-3” ISPs and local ISPs m last hop (“access”) network (closest to end systems) Tier 1 ISP NAP Tier-2 ISP local ISP local ISP local ISP local ISP local ISP Tier 3 ISP local ISP local ISP local ISP Local and tier- 3 ISPs are customers of higher tier ISPs connecting them to rest of Internet

Introduction1-26 Internet structure: network of networks  a packet passes through many networks! Tier 1 ISP NAP Tier-2 ISP local ISP local ISP local ISP local ISP local ISP Tier 3 ISP local ISP local ISP local ISP