Chapter 1 Introduction
|
|
- Lesley Stanley
- 6 years ago
- Views:
Transcription
1 Chapter 1 Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 All material copyright J.F Kurose and K.W. Ross, All Rights Reserved
2 Chapter 1: introduction our goal: v get feel and terminology v more depth, detail later in course v approach: use Inter as example overview: v what s the Inter? v what s a protocol? v work edge; hosts,, physical media v work core: packet/circuit switching, Inter structure v performance: loss, delay, throughput v security v protocol layers, service models v history 1-6
3 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, service models 1-7
4 What s the Inter: nuts and bolts view PC server wireless laptop smartphone wireless links wired links v millions of connected computing devices: hosts = end systems running work apps v communication links fiber, copper, radio, satellite transmission rate: bandwidth mobile work home work global ISP regional ISP router v Packet switches: forward packets (chunks of data) routers and switches institutional work 1-8
5 Fun inter appliances Web-enabled toaster + weather forecaster IP picture frame Tweet-a-watt: monitor energy use Inter refrigerator Slingbox: watch, control cable TV remotely Inter phones 1-9
6 What s the Inter: nuts and bolts view v Inter: work of works Interconnected ISPs v protocols control sending, receiving of msgs e.g., TCP, IP, HTTP, Skype, v Inter standards RFC: Request for comments IETF: Inter Engineering Task Force mobile work home work global ISP regional ISP institutional work 1-10
7 What s the Inter: a service view v Infrastructure that provides services to applications: Web, VoIP, , games, e- commerce, social s, v provides programming interface to apps hooks that allow sending and receiving app programs to connect to Inter provides service options, analogous to postal service mobile work home work institutional work global ISP regional ISP 1-11
8 What s a protocol? human protocols: v what s the time? v I have a question v introductions specific msgs sent specific actions taken when msgs received, or other events work protocols: v machines rather than humans v all communication activity in Inter governed by protocols protocols define format, order of msgs sent and received among work entities, and actions taken on msg transmission, receipt 1-12
9 What s a protocol? a human protocol and a computer work protocol: Hi Hi Got the time? 2:00 time TCP connection request TCP connection response Get <file> Q: other human protocols? 1-13
10 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, service models 1-14
11 A closer look at work structure: v work edge: hosts: clients and servers servers often in data centers v works, physical media: wired, wireless communication links mobile work home work global ISP regional ISP v work core: interconnected routers work of works institutional work 1-15
12 Access works and physical media Q: How to connect end systems to edge router? v residential s v institutional works (school, company) v mobile works keep in mind: v bandwidth (bits per second) of work? v shared or dedicated? 1-16
13 Access : digital subscriber line (DSL) central office telephone work DSL modem splitter voice, data transmitted at different frequencies over dedicated line to central office DSLAM DSL multiplexer ISP v use existing telephone line to central office DSLAM data over DSL phone line goes to Inter voice over DSL phone line goes to telephone v < 2.5 Mbps upstream transmission rate (typically < 1 Mbps) v < 24 Mbps downstream transmission rate (typically < 10 Mbps) 1-17
14 Access : cable work cable modem splitter cable headend Channels V I D E O V I D E O V I D E O V I D E O V I D E O V I D E O D A T A D A T A C O N T R O L frequency division multiplexing: different channels transmitted in different frequency bands 1-18
15 Access : cable work cable headend cable modem splitter data, TV transmitted at different frequencies over shared cable distribution work CMTS cable modem termination system ISP v HFC: hybrid fiber coax asymmetric: up to 30Mbps downstream transmission rate, 2 Mbps upstream transmission rate v work of cable, fiber attaches homes to ISP router homes share work to cable headend unlike DSL, which has dedicated to central office 1-19
16 Access : home work wireless devices often combined in single box to/from headend or central office cable or DSL modem wireless point (54 Mbps) router, firewall, NAT wired Ether (100 Mbps) 1-20
17 Enterprise works (Ether) institutional link to ISP (Inter) institutional router Ether switch institutional mail, web servers v typically used in companies, universities, etc v 10 Mbps, 100Mbps, 1Gbps, 10Gbps transmission rates v today, end systems typically connect into Ether switch 1-21
18 Wireless works v shared wireless work connects end system to router via base station aka point wireless LANs: within building (100 ft) b/g (WiFi): 11, 54 Mbps transmission rate wide-area wireless provided by telco (cellular) operator, 10 s km between 1 and 10 Mbps 3G, 4G: LTE to Inter to Inter 1-22
19 Host: sends packets of data host sending function: v takes application message v breaks into smaller chunks, known as packets, of length L bits v transmits packet into work at transmission rate R link transmission rate, aka link capacity, aka link bandwidth 2 host 1 two packets, L bits each R: link transmission rate packet transmission delay time needed to transmit L-bit packet into link = = L (bits) R (bits/sec) 1-23
20 Physical media v bit: propagates between transmitter/receiver pairs v physical link: what lies between transmitter & receiver v guided media: signals propagate in solid media: copper, fiber, coax v unguided media: signals propagate freely, e.g., radio twisted pair (TP) v two insulated copper wires Category 5: 100 Mbps, 1 Gpbs Ether Category 6: 10Gbps 1-24
21 Physical media: coax, fiber coaxial cable: v two concentric copper conductors v bidirectional v broadband: multiple channels on cable HFC fiber optic cable: v glass fiber carrying light pulses, each pulse a bit v high-speed operation: high-speed point-to-point transmission (e.g., 10 s-100 s Gpbs transmission rate) v low error rate: repeaters spaced far apart immune to electromagic noise 1-25
22 Physical media: radio v signal carried in electromagic spectrum v no physical wire v bidirectional v propagation environment effects: reflection obstruction by objects interference radio link types: v terrestrial microwave e.g. up to 45 Mbps channels v LAN (e.g., WiFi) 11Mbps, 54 Mbps v wide-area (e.g., cellular) 3G cellular: ~ few Mbps v satellite Kbps to 45Mbps channel (or multiple smaller channels) 270 msec end-end delay geosynchronous versus low altitude 1-26
23 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, service models 1-27
24 The work core v mesh of interconnected routers v packet-switching: hosts break application-layer messages into packets forward packets from one router to the next, across links on path from source to destination each packet transmitted at full link capacity 1-28
25 Packet-switching: store-and-forward L bits per packet source R bps R bps desfnafon v takes L/R seconds to transmit (push out) L-bit packet into link at R bps v store and forward: entire packet must arrive at router before it can be transmitted on next link v end-end delay = 2L/R (assuming zero propagation delay) one-hop numerical example: L = 7.5 Mbits R = 1.5 Mbps one-hop transmission delay = 5 sec more on delay shortly 1-29
26 Packet Switching: queueing delay, loss A R = 100 Mb/s C B queue of packets waiting for output link R = 1.5 Mb/s D E queuing and loss: v If arrival rate (in bits) to link exceeds transmission rate of link for a period of time: packets will queue, wait to be transmitted on link packets can be dropped (lost) if memory (buffer) fills up 1-30
27 Two key work-core functions routing: determines source -destination forwarding: route move taken packets by from router s input to appropriate packets router output routing algorithms routing algorithm local forwarding table header value output link dest address in arriving packet s header 4-31
28 Alternative core: circuit switching end-end resources allocated to, reserved for call between source & dest: v In diagram, each link has four circuits. call gets 2 nd circuit in top link and 1 st circuit in right link. v dedicated resources: no sharing circuit-like (guaranteed) performance v circuit segment idle if not used by call (no sharing) v Commonly used in traditional telephone works 1-32
29 Circuit switching: FDM versus TDM FDM Example: 4 users frequency TDM time frequency time 1-33
30 Packet switching versus circuit switching packet switching allows more users to use work! example: 1 Mb/s link each user: 100 kb/s when active active 10% of time v circuit-switching: 10 users v packet switching: with 35 users, probability > 10 active at same time is less than.0004 *.. N users 1 Mbps link Q: how did we get value ? Q: what happens if > 35 users? * Check out the online interactive exercises for more examples 1-34
31 Packet switching versus circuit switching is packet switching a slam dunk winner? v great for bursty data resource sharing simpler, no call setup v excessive congestion possible: packet delay and loss protocols needed for reliable data transfer, congestion control v Q: How to provide circuit-like behavior? bandwidth guarantees needed for audio/video apps still an unsolved problem (chapter 7) Q: human analogies of reserved resources (circuit switching) versus on-demand allocation (packet-switching)? 1-35
32 Inter structure: work of works v End systems connect to Inter via ISPs (Inter Service Providers) Residential, company and university ISPs v Access ISPs in turn must be interconnected. v So that any two hosts can send packets to each other v Resulting work of works is very complex v Evolution was driven by economics and national policies v Let s take a stepwise approach to describe current Inter structure 1-36
33 Inter structure: work of works Question: given millions of ISPs, how to connect them together? 1-37
34 Inter structure: work of works Option: connect each ISP to every other ISP? connecting each ISP to each other directly doesn t scale: O(N 2 ) connections. 1-38
35 Inter structure: work of works Option: connect each ISP to a global transit ISP? Customer and provider ISPs have economic agreement. global ISP 1-39
36 Inter structure: work of works But if one global ISP is viable business, there will be competitors. ISP A ISP B ISP C 1-40
37 Inter structure: work of works But if one global ISP is viable business, there will be competitors. which must be interconnected Inter exchange point ISP A IXP IXP ISP B ISP C peering link 1-41
38 Inter structure: work of works and regional works may arise to connect s to ISPS ISP A IXP IXP ISP B ISP C regional 1-42
39 Inter structure: work of works and content provider works (e.g., Google, Microsoft, Akamai ) may run their own work, to bring services, content close to end users ISP A ISP B ISP B IXP Content provider work IXP regional 1-43
40 Inter structure: work of works Tier 1 ISP Tier 1 ISP Google IXP IXP IXP Regional ISP Regional ISP ISP ISP ISP ISP ISP ISP ISP ISP v at center: small # of well-connected large works tier-1 commercial ISPs (e.g., Level 3, Sprint, AT&T, NTT), national & international coverage content provider work (e.g, Google): private work that connects it data centers to Inter, often bypassing tier-1, regional ISPs 1-44
41 Tier-1 ISP: e.g., Sprint POP: point-of-presence to/from backbone peering to/from customers 1-45
42 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, service models 1-46
43 How do loss and delay occur? packets queue in router buffers v packet arrival rate to link (temporarily) exceeds output link capacity v packets queue, wait for turn packet being transmitted (delay) A B packets queueing (delay) free (available) buffers: arriving packets dropped (loss) if no free buffers 1-47
44 Four sources of packet delay A transmission propagation B nodal processing queueing d nodal = d proc + d queue + d trans + d prop d proc : nodal processing check bit errors determine output link typically < msec d queue : queueing delay time waiting at output link for transmission depends on congestion level of router 1-48
45 Four sources of packet delay A transmission propagation B nodal processing queueing d nodal = d proc + d queue + d trans + d prop d trans : transmission delay: L: packet length (bits) R: link bandwidth (bps) d trans = L/R d trans and d prop very different * Check out the Java applet for an interactive animation on trans vs. prop delay d prop : propagation delay: d: length of physical link s: propagation speed in medium (~2x10 8 m/sec) d prop = d/s 1-49
46 Caravan analogy ten-car caravan toll booth 100 km 100 km toll booth v cars propagate at 100 km/hr v toll booth takes 12 sec to service car (bit transmission time) v car~bit; caravan ~ packet v Q: How long until caravan is lined up before 2nd toll booth? time to push entire caravan through toll booth onto highway = 12*10 = 120 sec time for last car to propagate from 1st to 2nd toll both: 100km/ (100km/hr)= 1 hr A: 62 minutes 1-50
47 Caravan analogy (more) 100 km 100 km ten-car caravan toll booth toll booth v suppose cars now propagate at 1000 km/hr v and suppose toll booth now takes one min to service a car v Q: Will cars arrive to 2nd booth before all cars serviced at first booth? A: Yes! after 7 min, 1st car arrives at second booth; three cars still at 1st booth. 1-51
48 Queueing delay (revisited) v R: link bandwidth (bps) v L: packet length (bits) v a: average packet arrival rate average queueing delay traffic intensity = La/R v La/R ~ 0: avg. queueing delay small v La/R -> 1: avg. queueing delay large v La/R > 1: more work arriving than can be serviced, average delay infinite! La/R ~ 0 * Check out the Java applet for an interactive animation on queuing and loss La/R ->
49 Real Inter delays and routes v what do real Inter delay & loss look like? v traceroute program: provides delay measurement from source to router along endend Inter path towards destination. For all i: sends three packets that will reach router i on path towards destination router i will return packets to sender sender times interval between transmission and reply. 3 probes 3 probes 3 probes 1-53
50 Real Inter delays, routes traceroute: gaia.cs.umass.edu to 3 delay measurements from gaia.cs.umass.edu to cs-gw.cs.umass.edu 1 cs-gw ( ) 1 ms 1 ms 2 ms 2 border1-rt-fa5-1-0.gw.umass.edu ( ) 1 ms 1 ms 2 ms 3 cht-vbns.gw.umass.edu ( ) 6 ms 5 ms 5 ms 4 jn1-at wor.vbns. ( ) 16 ms 11 ms 13 ms 5 jn1-so wae.vbns. ( ) 21 ms 18 ms 18 ms 6 abilene-vbns.abilene.ucaid.edu ( ) 22 ms 18 ms 22 ms 7 nycm-wash.abilene.ucaid.edu ( ) 22 ms 22 ms 22 ms ( ) 104 ms 109 ms 106 ms 9 de2-1.de1.de.geant. ( ) 109 ms 102 ms 104 ms 10 de.fr1.fr.geant. ( ) 113 ms 121 ms 114 ms 11 renater-gw.fr1.fr.geant. ( ) 112 ms 114 ms 112 ms 12 nio-n2.cssi.renater.fr ( ) 111 ms 114 ms 116 ms 13 nice.cssi.renater.fr ( ) 123 ms 125 ms 124 ms 14 r3t2-nice.cssi.renater.fr ( ) 126 ms 126 ms 124 ms 15 eurecom-valbonne.r3t2.ft. ( ) 135 ms 128 ms 133 ms ( ) 126 ms 128 ms 126 ms 17 * * * 18 * * * 19 fantasia.eurecom.fr ( ) 132 ms 128 ms 136 ms trans-oceanic link * means no response (probe lost, router not replying) * Do some traceroutes from exotic countries at
51 Packet loss v queue (aka buffer) preceding link in buffer has finite capacity v packet arriving to full queue dropped (aka lost) v lost packet may be retransmitted by previous node, by source end system, or not at all A buffer (waiting area) packet being transmitted B packet arriving to full buffer is lost * Check out the Java applet for an interactive animation on queuing and loss 1-55
52 Throughput v throughput: rate (bits/time unit) at which bits transferred between sender/receiver instantaneous: rate at given point in time average: rate over longer period of time server server, sends with bits (fluid) file of into F bits pipe to send to client link pipe capacity R s bits/sec that can carry fluid at rate R s bits/sec) link pipe capacity R c bits/sec that can carry fluid at rate R c bits/sec) 1-56
53 Throughput (more) v R s < R c What is average end-end throughput? R s bits/sec R c bits/sec v R s > R c What is average end-end throughput? R s bits/sec R c bits/sec bottleneck link link on end-end path that constrains end-end throughput 1-57
54 Throughput: Inter scenario v per-connection endend throughput: min(r c,r s,r/10) v in practice: R c or R s is often bottleneck R s R s R s R R c R c R c 10 connections (fairly) share backbone bottleneck link R bits/sec 1-58
55 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, service models 1-59
56 Protocol layers Networks are complex, with many pieces : hosts routers links of various media applications protocols hardware, software Question: is there any hope of organizing structure of work?. or at least our discussion of works? 1-60
57 Organization of air travel ticket (purchase) baggage (check) gates (load) runway takeoff airplane routing airplane routing ticket (complain) baggage (claim) gates (unload) runway landing airplane routing v a series of steps 1-61
58 Layering of airline functionality ticket (purchase) ticket (complain) ticket baggage (check) baggage (claim baggage gates (load) gates (unload) gate runway (takeoff) runway (land) takeoff/landing airplane routing airplane routing airplane routing airplane routing airplane routing departure airport intermediate air-traffic control centers arrival airport layers: each layer implements a service via its own internal-layer actions relying on services provided by layer below 1-62
59 Why layering? dealing with complex systems: v explicit structure allows identification, relationship of complex system s pieces layered reference model for discussion v modularization eases maintenance, updating of system change of implementation of layer s service transparent to rest of system e.g., change in gate procedure doesn t affect rest of system v layering considered harmful? 1-63
60 Inter protocol stack v application: supporting work applications FTP, SMTP, HTTP v transport: process-process data transfer TCP, UDP v work: routing of datagrams from source to destination IP, routing protocols v link: data transfer between neighboring work elements Ether, (WiFi), PPP v physical: bits on the wire application transport work link physical 1-64
61 ISO/OSI reference model v presentation: allow applications to interpret meaning of data, e.g., encryption, compression, machine-specific conventions v session: synchronization, checkpointing, recovery of data exchange v Inter stack missing these layers! these services, if needed, must be implemented in application needed? application presentation session transport work link physical 1-65
62 segment datagram frame message H l H t H n H t H n H t M M M M source application transport work link physical Encapsulation link physical switch H l H n H n H t H t H t M M M M destination application transport work link physical H l H n H n H t H t M M work link physical H n H t M router 1-66
63 : summary covered a ton of material! v Inter overview v what s a protocol? v work edge, core, work packet-switching versus circuit-switching Inter structure v performance: loss, delay, throughput v layering, service models v security v history you now have: v context, overview, feel of working v more depth, detail to follow! 1-67
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,
More informationComputer Networking Introduction
Computer Networking Introduction Halgurd S. Maghdid Software Engineering Department Koya University-Koya, Kurdistan-Iraq Lecture No.2 Chapter 1: roadmap 1.1 what is the Inter? 1.2 work edge end systems,
More informationChapter I: Introduction
Chapter I: Introduction UG3 Computer Communications & Networks (COMN) Myungjin Lee myungjin.lee@ed.ac.uk Slides copyright of Kurose and Ross The work core mesh of interconnected routers packet-switching:
More informationChapter 1 Introduction
Chapter 1 Introduction A note on the use of these Powerpoint slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;
More informationSince 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
More informationComputer 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:
More informationChapter 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,
More informationInternet: A Brief Overview. Introduction 2-1
Inter: A Brief Overview Introduction 2-1 Quick Questions v What is the Inter? v How was it invented and developed? https://www.youtube.com/v/9hiqjrmhtv4 Text: http://www.intersociety.org/inter/what-inter/
More informationComputer Networks & Security 2016/2017
Computer Networks & Security 2016/2017 Protocol Layering (02) Dr. Tanir Ozcelebi Courtesy: Kurose & Ross TU/e Computer Science Security and Embedded Networked Systems Your typical lunch Slide 2 What is
More informationChapter 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 see the animations; and can
More informationComputer Networks and the Internet. CMPS 4750/6750: Computer Networks
Computer Networks and the Inter CMPS 4750/6750: Computer Networks Outline What Is the Inter? Access Networks Packet Switching and Circuit Switching A closer look at delay, loss, and throughput Interconnection
More informationCSE 434 Spring 2013 Computer Networks
CSE 434 Spring 2013 Computer Networks Georgios Varsamopoulos Arizona State University What is this course about? Students will learn How works are designed and structured What is the architecture of the
More informationNetwork core and metrics
Network core and metrics latency propaga-on transmit queue Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley Some materials copyright 1996-2012 J.F Kurose and
More informationPacket-switching: store-and-forward
Packet-switching: store-and-forward L R R R Takes L/R seconds to transmit (push out) packet of L bits on to link or R bps Entire packet must arrive at router before it can be transmitted on next link:
More informationChapter 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
More informationWhat 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
More informationIntroduction to Computer Networks. Chapter 1: introduction
Introduction to Computer Networks EECS 3214 Slides courtesy of J.F Kurose and K.W. Ross, All Rights Reserved Introduction 1-1 Chapter 1: introduction our goal: get feel and terminology more depth, detail
More informationWhat 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
More informationCS 4390 Computer Networks
CS 4390 Computer Networks UT D application transport network data link physical Session 04 Packet Switching dapted from Computer Networking a Top-Down pproach 1996-2012 by J.F Kurose and K.W. Ross, ll
More informationAnnouncements. 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
More informationChapter 1 Introduction
Chapter 1 Introduction Introduction Prof. Sungwook Kim ( 김승욱 ) AS building 903 Tel : 02) 705-8932 E-mail : swkim01@sogang.ac.kr TA : Joonsu Ryu ( 류준수 ) AS building 901 E-mail : sok54833@naver.com Chapter
More informationend systems, access networks, links circuit switching, packet switching, network structure
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
More informationFundamentals of Information Systems
Fundamentals of Information Systems Computer Networking Module Year 2017/2018 Master Degree in Data Science Armir Bujari abujari@math.unipd.it About the module Requirements No strict requirement, however,
More informationCS 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
More informationOverview 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
More informationInternetworking Technology -
Internetworking Technology - Chapter 1 Computer Networks and the Internet (Cont.) 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
More informationChapter 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?
More informationCS 3516: Advanced Computer Networks
Welcome to CS 3516: Advanced Computer Networks Prof. Yanhua Li Time: 9:00am 9:50am M, T, R, and F Location: Fuller 320 Fall 2017 A-term 1 Some slides are originally from the course materials of the textbook
More informationChapter 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
More informationCS 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
More informationCMPE 150/L : Introduction to Computer Networks. Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 3
CMPE 150/L : Introduction to Computer Networks Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 3 1 No Class 1/23 (next Tuesday) Dr. Qian absent to serve a duty for US Department of Energy
More informationIntroduction. overview: our goal: get feel and terminology more depth, detail later in course approach: use Internet as example
Introduction our goal: get feel and terminology more depth, detail later in course approach: use Inter as example overview: what s the Inter? what s a protocol? work edge; hosts,, physical media work core:
More informationChapter 1: introduction
Chapter 1: introduction our goal: v get feel and terminology v more depth, detail later in course v approach: use Inter as example overview: v what s the Inter? v what s a protocol? v work edge; hosts,,
More informationA 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
More informationChapter 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 see the animations; and can
More informationChapter 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 see the animations; and can
More informationEC441 Fall 2018 Introduction to Computer Networking Chapter 1: Introduction
EC441 Fall 2018 Introduction to Computer Networking Chapter 1: Introduction This presentation is adapted from slides produced by Jim Kurose and Keith Ross for their book, Computer Networking: A Top Down
More informationCS4491/02 Fog Computing. Network Basics
CS4491/02 Fog Computing Network Basics What s the Inter: nuts and bolts view PC server wireless laptop smartphone wireless links wired links millions of connected computing devices: hosts = end systems
More informationChapter 1 Introduction
Chapter 1 Introduction Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved
More informationChapter 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 see the animations; and can
More informationCSCE 463/612 Networks and Distributed Processing Spring 2018
CSCE 463/612 Networks and Distributed Processing Spring 2018 Introduction II Dmitri Loguinov Texas A& University January 25, 2018 Original slides copyright 1996-2004 J.F Kurose and K.W. Ross 1 Chapter
More informationChapter 1 Introduction
Chapter 1 Introduction Adapted from material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley
More informationChapter 1 Introduction
Chapter 1 Introduction All material copyright 1996-2016 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top Down Approach 7 th edition Jim Kurose, Keith Ross Pearson/Addison Wesley
More informationIntroduction 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
More informationFoundations of Telematics
Foundations of Telematics Chapter 1 Introduction Acknowledgement: These slides have been prepared by J.F. Kurose and K.W. Ross Foundations of Telematics (AMW SS 2010): 01 Introduction 1 Chapter 1: Introduction
More informationComputer Networks. Lecture 1: Introduction. Computer Networking: A Top Down Approach. Dr. Yaoqing Liu
Computer Networks Lecture 1: Introduction Dr. Yaoqing Liu liu@clarkson.edu Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 Based on slides by J. F.
More informationChapter 1 Computer Networks and the Internet
CSB051 Computer Networks 電腦網路 Chapter 1 Computer Networks and the Internet 吳俊興 國立高雄大學資訊工程學系 Outline 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Access networks and physical media 1.5
More informationInformática y Comunicaciones. Chapter 1 Introduction to Communications
Informática y Comunicaciones Chapter 1 Introduction to Communications All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Introduction to Communications 1-1 Chapter 1: introduction
More informationCourse 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,
More informationChapter 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 see the animations; and can
More informationFundamentals of Information Systems
Fundamentals of Information Systems Computer Networking Module Year 2017/2018 Master Degree in Data Science Armir Bujari abujari@math.unipd.it Inter structure: work of works Question: given millions of
More informationCSC 401 Data and Computer Communications Networks
CSC 401 Data and Computer Communications Networks Computer Networks and The Internet Sec 1.4-1.5 Prof. Lina Battestilli Outline Computer Networks and the Internet (Ch 1) 1.1 What is the Internet? 1.2 network
More informationChapter 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 see the animations; and can
More informationCourse on Computer Communication and Networks. Lecture 2 Chapter 1: Introduction: Part B: Network structure, performance, security prelude
Course on Computer Communication and Networks Lecture 2 Chapter 1: Introduction: Part B: Network structure, performance, security prelude CTH EDA344/GU DIT 420 Based on the book Computer Networking: A
More informationTCN-5030 Computer Communications and Networking Technologies
TCN-5030 Computer Communications and Networking Technologies Florida International University 1-1 Course Info Textbook: James Kurose and Keith Ross, Computer Networking: A Top Down Approach (6th Edition),
More informationIntroduction to Computer Networks. Roadmap
Introduction to Computer Networks Miguel A. Labrador Department of Computer Science & Engineering labrador@csee.usf.edu http://www.csee.usf.edu/~labrador 1 Dr. Miguel A. Labrador Roadmap 1.1 What is the
More informationend systems, access networks, links circuit switching, packet switching, network structure
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
More informationChapter 1 Introduction
Chapter 1 Introduction All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012
More informationΔίκτυα Μετάδοσης Δεδομένων Data Networks. Introduction 1-1
Δίκτυα Μετάδοσης Δεδομένων Data Networks Introduction 1-1 Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley All material copyright J.F Kurose and K.W. Ross, All
More informationInternet: A Brief Overview. Chapter 1
Inter: A Brief Overview Chapter 1 Chapter 1: introduction our goal: v get feel and terminology v more depth, detail later in course v approach: use Inter as example overview: v what s the Inter? v what
More informationLECTURE 1 - INTRODUCTION. Jacob Aae Mikkelsen
LECTURE 1 - INTRODUCTION Jacob Aae Mikkelsen GOALS TODAY History of networks Get "feel" and terminology More depth and details later in the course Approach: Use Internet as example ORIGIN OF THE INTERNET
More informationTelecommunication Networks Introduction
Telecommunication Networks Introduction Telemedicina e e-saúde 2016/17 Pedro Brandão References These slides are the companions of Computer Networking: A Top Down Approach 5th edition. Jim Kurose, Keith
More informationChapter 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
More informationEECS 3214: Computer Network Protocols and Applications
EECS 3214: Computer Network Protocols and Applications Suprakash Datta Course page: http://www.eecs.yorku.ca/course/3214 Office: LAS 3043 Email: datta [at] cse.yorku.ca These slides are adapted from Jim
More informationCMPT-371: Data Communication and Networking. Bob Gill, P.Eng., FEC, smieee Introduction 2-1
CMPT-371: Data Communication and Networking Bob Gill, P.Eng., FEC, smieee Email: balbirg@sfu.ca Introduction 2-1 Course Details and Evaluation Breakdown Calendar Objective/Description Data communication
More informationCMPT-371: Data Communication and Networking. Bob Gill, P.Eng., FEC, smieee Introduction 0-1
CMPT-371: Data Communication and Networking Bob Gill, P.Eng., FEC, smieee Email: balbirg@sfu.ca Introduction 0-1 Course Details and Evaluation Breakdown Calendar Objective/Description Data communication
More informationCSC 401 Data and Computer Communications Networks
CSC 401 Data and Computer Communications Networks Computer Networks and The Inter Sec 1.3 Prof. Lina Battestilli Fall 2017 Outline Computer Networks and the Inter (Ch 1) 1.1 What is the Inter? 1.2 work
More informationPart 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?
More informationTelecommunication Networks Introduction
Telecommunication Networks Introduction Telemedicina e e-saúde 2011/12 Pedro Brandão References These slides are the companions of Computer Networking: A Top Down Approach 5th edition. Jim Kurose, Keith
More informationTNK108 Datornät /Computer Networking. Fall Introduction 1-1
TNK108 Datornät /Computer Networking Fall 2018 Introduction 1-1 Course Information basics Literature Textbook: J. Kurose and K. Ross, Computer Networking A Top Down Approach, 7th edition Lecture notes/slides
More informationCS 3516: Computer Networks
Welcome to CS 3516: Computer Networks Prof. Yanhua Li Time: 9:00am 9:50am M, T, R, and F Location: AK219 Fall 2018 A-term 1 Some slides are originally from the course materials of the textbook Computer
More informationELE 543 Computer Network
Ken Q. Yang, ECE, URI Ken Q. Yang What Do You Learn? 1. Network Concepts and rchitectures 2. Communication Protocols ELE 543 Computer Network (e.g. TCP/IP, Ethernet, wireless) 3. Doing Useful Work on a
More informationend systems, access networks, links circuit switching, packet switching, network structure
Introduction 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
More informationLecture 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,
More informationCMP-330 Computer Networks
CMP-330 Computer Networks http://faculty.pucit.edu.pk/fawaz/cmp330 Spring 2013 MW 11:30 1:00 (Morning), Room # 11 MW 4:00 5:30 (Evening), Room # 9 Fawaz Bokhari Office: Senior Faculty Rooms Office Hour:
More informationLecture Computer Networks WS 2016/2017
Lecture Computer Networks WS 2016/2017 Prof. Dr. Werner Filip filip@fb2.fra-uas.de 1-1 References James F. Kurose, Keith W. Ross, Computer Networking, A Top-Down Approach, (6th Edition), Pearson, 2012.
More informationChapter 1 Introduction
Advanced Computer Networking Graduate Course from Electrical Engineering School A. Beheshti Communication Group Iran University of Science and Technology Chapter 1 Introduction Text Book: Computer Networking:
More informationCSEN 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
More informationChapter 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
More informationPart 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
More informationChapter 1 Introduction
Chapter 1 Introduction Slightly adapted from -- Computer Networking: A Top Down Approach, 5 th edition. Jim Kurose, Keith Ross Addison-Wesley, April 2009. All material copyright 1996-2009 J.F Kurose and
More informationChapter 1: roadmap parte B
Chapter 1: roadmap parte B 1.1 what is the Internet? 1.2 network edge end systems, access networks, links 1.3 network core packet switching, circuit switching, network structure 1.4 delay, loss, throughput
More informationChapter 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
More informationChapter 1 Introduction
Chapter 1 Introduction All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012
More informationChapter 1 Introduction
Chapter 1 Introduction All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012
More informationChapter 1 Introduction
Chapter 1 Introduction A note on the use of these Powerpoint slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;
More informationCSC 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
More informationInternet 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,
More informationCSE3213 Computer Network I
CSE3213 Computer Network I Introduction Course page: http://www.cse.yorku.ca/course/3213 1 Course Contents 3 general areas: data communications, networking, and protocols 1. Data communications: basic
More information1.1 What is the Internet? 1.2 Network edge. 1.3 Network core
Chapter 1: roadmap 1.1 What is the Inter? 1.2 Network edge end systems, works, links 1.3 Network core work structure, circuit switching, packet switching 14Delay 1.4 Delay, loss and throughput performance
More informationChapter 1 Introduction
Chapter 1 Introduction A note on the use of these Powerpoint slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;
More informationend systems, access networks, links network structure, circuit switching, packet switching
Chapter 1: roadmap 1.1 What is the Inter? 1.2 Network edge end systems, works, links 1.3 Network core work structure, circuit switching, packet switching 1.4 Delay, loss and throughput performance in packet-switched
More informationSuprakash Datta. Office: LAS 3043 Phone: ext Course page:
CSE 3214: Computer Network Protocols and Applications Suprakash Datta datta@cse.yorku.ca Office: LAS 3043 Phone: 416-736-2100 ext 77875 Course page: http://www.cse.yorku.ca/course/3214 These slides are
More informationSwitching 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
More informationCOMP 431 Internet Services & Protocols. A Whirlwind Introduction to the Internet ( Networking Nouns and Verbs ) Jasleen Kaur
There is a poll posted on piazza. Please take a minute to fill it out. COMP 431 Internet Services & Protocols A Whirlwind Introduction to the Internet ( Networking Nouns and Verbs ) Jasleen Kaur January
More informationCSEE 4119 Computer Networks. Chapter 1 Introduction (2/2) Introduction 1-1
CSEE 4119 Computer Networks Chapter 1 Introduction (2/2) Introduction 1-1 Chapter 1: Introduction Our goal: get feel and terminology more depth, detail later in course approach: use Internet as example
More informationComputer Networking: A Top Down Approach
Computer Networking: A Top Down Approach Seventh Edition Chapter 1 Introduction Slides in this presentation contain hyperlinks. JAWS users should be able to get a list of links by using INSERT+F7 Introduction
More informationend systems, access networks, links circuit switching, packet switching, network structure
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
More informationWhat is a Distributed System? Module 1: Introduction to Networking & Internetworking
What is a Distributed System? 1 Working Definition A distributed system is several computers doing something together Three primary features of a distributed system Multiple computers Communications Virtual
More informationCSE 3214 Course Overview. CSE 3214: Computer Network Protocols and Applications. Chapter 1: roadmap. Chapter 1: Introduction. 1-5 Introduction 1-6
CSE 3214: Computer Network Protocols and pplications r. Peter Lian, Professor epartment of Computer Science and Engineering York University Email: peterlian@cse.yorku.ca ffice: 1012C Lassonde Building
More information