Lecture1 - Intro

Lecture1 - Intro - Data Networks Lecture 1 Introduction...

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Data Networks Lecture 1 Introduction Eytan Modiano Eytan Modiano Slide 1
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6.263: Data Networks Fundamental aspects of network Design and Analysis: Architecture Layering Topology design Protocols Pt.-to-Pt. Multiple access End-to-end Algorithms Error recovery Routing Flow Control Analysis tools Probabilistic modeling Queueing Theory Eytan Modiano Slide 2
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Course Information Lecturer: Professor Eytan Modiano Requirements & Grading About one problem set per week (10% of grade) Project (5% of grade) Midterm exam (35 %) Final Exam during finals week (50%) Prerequisite Policy : 6.041, or an equivalent class in probability Textbook: Bertsekas & Gallager, Data Networks (2nd Edition) Eytan Modiano Slide 3
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Tentative syllabus LEC # TOPICS 1 Introduction, OSI 7-layer architecture 2 Data Link Layers, Framing, error detection 3 Retransmission Algorithms 4 Retransmission Algorithms 5 Queueing Models - Introduction & Little's theorem 6 M/M/1, M/M/m, queues etc. 7 Networks of queues 8 M/G/1 queues, M/G/1 w/ vacations 9 M/G/1 queues and reservations, priority queues 10 Stability of queueing systems 11 M/G/1 queue occupancy distribution 12 Quiz Eytan Modiano Slide 4
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Tentative syllabus, continued LEC # TOPICS 13 Multiple access & Aloha 14 Stabilized Aloha, Tree Algorithms 15 CSMA, CSMA/CD and Ethernet 16 High-speed LANs, Token rings, Satellite reservations 17 Introduction to switch architecture 18 High Speed Switch Scheduling 19 Broadcast routing & Spanning trees 20 Shortest path routing 21 Distributed routing algorithms, optimal routing 22 Flow Control - Window/Credit Schemes 23 Flow Control - Rate Based Schemes 24 Transport layer and TCP/IP 25 ATM Networks 26 Special topic: Optical Networks, Wireless networks Final Exam during final exam week. Date and time to be announced. Eytan Modiano Slide 5
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Network Applications Resource sharing Computing Mainframe computer (old days) Today, computers cheaper than comm (except LANS) Printers, peripherals Information DB access and updates E.g., Financial, Airline reservations, etc. Services Email, FTP, Telnet, Web access Video conferencing DB access Client/server applications Eytan Modiano Slide 6
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Network coverage areas Wide Area Networks (WANS) Span large areas (countries, continents, world) Use leased phone lines (expensive!) 1980’s: 10 Kbps, 2000’s: 2.5 Gbps User access rates: 56Kbps – 155 Mbps typical Shared comm links: switches and routers E.g, IBM SNA, X.25 networks, Internet Local Area Networks (LANS) Span office or building Single hop (shared channel) (cheap!) User rates: 10 Mbps – 1 Gbps E.g., Ethernet, Token rings, Apple-talk Metro Area networks (MANS) Storage area networks Eytan Modiano Slide 7
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Network services Synchronous Session appears as a continuous stream of traffic (e.g, voice) Usually requires fixed and limited delays Asynchronous Session appears as a sequence of messages Typically bursty E.g., Interactive sessions, file transfers, email Connection oriented services
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Lecture1 - Intro - Data Networks Lecture 1 Introduction...

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