Fundamentals of Communication Networks

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1 Politecico di Milao Scuola di Igegeria Idustriale e dell Iformazioe Fudametals of Commuicatio Networks Alessadro Redodi

2 Teacher o Alessadro Redodi o Office: Dip. di Elettroica, Iformazioe e Bioigegeria DEIB, 3rd floor o Tel: ( ) 3403 o alessadroerico.redodi@polimi.it o Web page: o Office hours: Tuesday 10:00-11:00 (by appoitmet)

3 Exams o Writte ad oral exam 4/5 Numerical exercises 1 Set of questios Oral exam withi my discretio

4 Teachig material (1) o Referece books: A. S. Taebaum, D. J. Wetherall, Computer Networks, Fifth Editio, Pearso James F. Kurose, Keith W. Ross, Computer Networkig: a top dow approach, Editore: Pearso

5 Teachig material (2) o Other books Saadawi Tarek N., Ammar Mostafa H., El Hakeem Ahmed, Fudametals of telecommuicatio etworks Wiley Fred Halsall, Data Commuicatios, Computer Networks, ad Ope Systems Addiso-Wesley Behrouz A. Forouza, TCP/IP protocol suite, McGraw-Hill Douglas E. Comer, Iteretworkig with TCP/IP, Addiso-Wesley

6 Teachig material (3) o Lecture slides o Other material ad liks o Course web site

7 Course home page

8 Course objetive o Provide you the basics of computer etworks o Preset you the buildig blocks of the Iteret This basic kowledge is fudametal for the advaced topics covered by most of the other courses of the MSc program

9 Backgroud Software applicatios exchage iformatio with remote applicatios For commuicatig they use: The INTERNET o We will deal with: How to support commuicatios Protocols used at differet layers Network ifrastructures Commuicatios uses physical media ad are subject to rules (protocols)

10 Probability Theory o I additio to Commuicatio Networks, the course provides also the basics of probability theory o This is istrumetal to some advaced course of etworkig like Traffic Theory, but also to other courses of the study program

11 Course program o Basics of probability theory Probabilities o o o o o Defiitios Uiform spaces Coditioal spaces Bayes Formulas Statistical idepedece Radom Variables o o o o o o o Spaces with ifiite outcomes Cotiuous Radom Variables Discrete Radom Variables Momets of a pdf Coditioal distributios ad desities Vectorial Radom Variables Fuctios of Radom Variables

12 Course program o Fuctioal models Protocols Commuicatio services Stack models ad mai fuctios o Physical layer Multiplexig Multiple access Trasport etworks o Lik layer Framig Error cotrol Retrasmissio Flow cotrol Lik protocol example (HDLC)

13 Course program o Local Area Networks Radom access Etheret Bridgig o Iteret architecture o Network layer: IP Addressig Forwardig ad routig Cotrol protocols Routig protocols

14 Course program o Trasport layer UDP TCP o Applicatio layer Name maagemet: DNS File trasfer: FTP Web Browsig: HTTP (SMTP) Peer-To-Peer applicatios o Private etworks Private addressig Tuels NAT o MPLS o IPv6

15 Politecico di Milao Scuola di Igegeria Idustriale e dell Iformazioe Itroductio Fudametals of Commuicatio Networks

16 A bit of history

17 The bor of the Iteret: 60s o 1961: Kleirock shows the effectiveess of packet switchig with queuig theory o 1967: Lawrece Roberts desigs ARPAet (Advaced Research Projects Agecy) o 1969: first etwork ode IMP (Iterface Message Processor) di ARPAet at UCLA

18 o 1972: o 1970: o 1974: The bor of the Iteret: 70s NCP (Network Cotrol Protocol) the first Iteret protocol First applicatio ARPAet has 15 odes ALOHAet radio packet etwork at Uiv. of Hawaii Cerf ad Kah desig iteretworkig (etwork of etworks) priciples o 1976: Etheret is desiged i the Xerox labs o 1979: ARPAet has 200 odes

19 The bor of the Iteret: 80s o 1982: SMTP for is defied o 1983: TCP/IP suite replaces NCP o 1983: DNS is defied for mappig of ames ad addresses o 1985: FTP protocol o 1988: cogestio cotrol of TCP o New atioal etworks: Cset, BITet, NSFet, Miitel o hosts

20 First applicatios o Telet o o FTP

21 The bor of the Iteret: 90s o 1990: ARPAet is discotiued o 1991: NSF allows commercial use of NSFet o First 90s: Tim Berers- Lee ivets the web at Cer i Geève o 1994: First browser Mosaic, the Netscape o Ed of 90s: explosio of commercial use of the Web

22 The bor of the Iteret: 2000s 2000s: o New killer applicatios : istat messagig, P2P file sharig, IP Telephoy, social etworks o Network security o Billios of users o Lik speeds up to few Gbps Shaw Faig Zuckerberg Diffie-Hellma-Merkle

23 The bor of the Iteret: 10s 10s - today: o Mobile iteret o iphoe o Adroid o Applicatio markets

24 24

25 World is small

26 Iteret growth

27 Iteret vs mobile etworks Source: ITU

Slides are an edited mashup of two books

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