EL5363Introduction

EL5363Introduction - Introduction 1 Outline Objective...

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1 Introduction
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 2 Outline Objective Architecture Classification Circuit switching Packet switching
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 3 What for… Information: one place another place Commun. network: transportation platform Data network: packets.
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 4 Design requirements Cost-effective Easy to manage Resilient High-speed Scalable …..
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 5 Simple example Basic requirement: connectivity The simplest solution: fully-connected net.
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 6 Fully-connected: pro and cons Pro: High Performance Cons: Too many links (how many?) Complexity Cost Scalability
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 7 General Architecture Intermediate nodes: signal relay End-to-End: multi-hop transportation C E A B D 3 1 5 4 2 7 5 4 6 2 1 3 9 8 10 11 12 13 14 Star Ring Mesh
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 8 Hierarchical Architecture
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 9 Classification Coverage: Wide area network (WAN) Metropolitan area network (MAN) Local area network (LAN) Switching technology: Circuit switching Packet switching
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 10 WAN, MAN & LAN WAN: Long distance High reliability LAN: Cost-sensitive High speed MAN: emerging requirement, ~300km Requirements between LAN & WAN
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