ECE155ALecture1

ECE155ALecture1 - Introduction to Computer Networks Lecture...

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1 Introduction to Computer Networks Lecture 1 Professor Louise E. Moser Winter 2010
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2 Course Administrative Details Lectures: T Th 2:00-3:15pm; Building 387 Room 104 Discussion Sections: F 10:00-10:50am; Phelps 1448 Office Hours: Professor Moser: T 10:00am-12noon, Th 10:00am-11:00am Harold Frank Hall 2164 TA Arvin Faruque: W 11:00am-1:00pm; Th 11:00am-12noon Harold Frank Hall ECI Lab Textbook: Introduction to Computer Networks by Andrew Tanenbaum Midterm Exam: Thursday, February 4, 2:00-3:15pm Final Exam: Wednesday, March 17, 4:00-7:00pm Grading: Midterm Exam 15%, Final Exam 35%, Assignments 35%, Class Attendance/Participation 15%
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3 Definition of Computer Network Computer Network - Interconnected collection of autonomous computers and communication media Interconnected - Able to exchange info via copper wire, optical fiber, microwaves, satellites, etc Autonomous - Act independently, unilaterally
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4 Computer Network vs. Distributed System Computer Network Users must handle network management themselves Distributed System Multiple computers that appear to be a single computer (virtual uni-processor) to the users Middleware creates the image of a single coherent system
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5 Client-Server vs. Peer-to-Peer Models Client-Server Server – Provides services for clients A network with two clients and one server
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6 Client-Server vs. Peer-to-Peer Models Peer-to-Peer No fixed clients and servers
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7 Classification of Networks By distance and location
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8 Local Area Networks Local Area Network (LAN) typically spans a room, a building or a campus LANs are distinguished from other kinds of networks by three characteristics Size – restricted in size => worst-case transmission time is bounded Transmission technology – typically use broadcast Point-to-point vs. broadcast Topology Bus, ring, etc
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9 LANs and Subnets Relationships between hosts, LANs, routers, subnets
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10 Metropolitan Area Networks Metropolitan Area Network (MAN) covers a city Example MAN for cable TV
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11 Network Structure Host or End System Collection of machines that run user (application) programs Communication Subnet - Connects hosts Two distinct components Transmission Lines - move bits (circuits, channels, trunks) Routers, Switching Elements, or Interface Message Processors (IMPs) Connect two or more transmission lines Two types of channels Point-to-Point channels Broadcast channels Router Router Cable or Telephone Line
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ECE155ALecture1 - Introduction to Computer Networks Lecture...

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