NETE0510 Communication Media and Data Communications

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24 Οκτ 2013 (πριν από 3 χρόνια και 5 μήνες)

58 εμφανίσεις

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NETE0510

Communication Media and

Data Communications

Dr. Supakorn Kungpisdan

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Supakorn Kungpisdan


Education


PhD (Computer Science and Software Engineering), Monash
University, Australia


M.Eng (Computer Engineering), KMUTT


B.Eng (Electrical Engineering), Thammasat


Specializations


Information and Network Security, Electronic Commerce,
Formal Methods, Computer Networking


Experience


External Research Advisor, Network Security Research
Group, Monash University, Australia


Business Development Director, CyberPlanet Interactive


http://www.mut.ac.th/~supakorn/


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Course Descriptions


Timetable: Saturday 09.00AM
-
12.00PM



Textbooks


D. L. Spohn, Data Network Design, 3
rd

Edition, Osborne,
ISBN 0
-
07
-
219312
-
3


L. L. Peterson and B. S. Davie, Computer Networks: A
Systems Approach, 3
rd

Edition, Elsevier, ISBN 81
-
8147
-
206
-
3


W. Stallings, Data and Computer Communications, 8
th

Edition, Pearson Prentice Hall, ISBN 0
-
13
-
238195
-
8

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Outline

1.
Data Communications: Past to Future

2.
Understanding the Standards and Their Makers

3.
Introduction to Transmission Technologies

4.
Multiplexing and Switching Technologies

5.
Optical Networking

6.
Physical Layer Protocols and Access Technologies

7.
Common Protocols and Interfaces in the LAN Environment

8.
Frame Relay

9.
Common WAN Protocols


ATM

10.
Wireless LANs and Cellular Networks

11.
Common Protocols and Interfaces in the Upper Layers (TCP/IP)

12.
Emerging Technologies

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Evaluation Criteria


Assignment: 30%


Midterm Exam: 30%


Final Exam: 40%

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Data Communications: Past to
Future

Supakorn Kungpisdan

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Outline


Defining Data Communications Needs


The Telephone Network: Current Network
Infrastructure


The Data Revolution


Applications and Key Enablers


Communications Technologies as Enablers


Corporate Infrastructure Changes


The Data Network of the Twentieth Century

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Data Communications


Data VS Information


Data Communications enables consumers or businesses
to communicate in some form or fashion

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Data Communications Network

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Data Communications Network (cont’d)

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Data Communications Needs


Primary personnel’s and applications’ communications
patterns:


A drive for longer working hours


Data that is graphically and bandwidth intensive


A desire for any
-
to
-
any extranet communications patterns



Corporate and government communications needs


Increased LAN and application connectivity between
departments, customers, and suppliers


The continued movement of mainframe applications to a
distributed client
-
server architecture


The movement of applications into the network (ASP and e
-
commerce)


The emergence of a new class of image and graphics
-
intensive
interactive applications

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Brief History of Communications

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Brief History of Communications (cont’d)


Spoken human communications


50,000 yrs


Graphic images in caves


20,000 yrs


Written language


5,000 yrs


Optical telegraphy


17
th
-
18
th

century


Electrical telegraphy


1846


Television broadcasting


1940s


Fiber Optic Transmission


1980s


Asynchronous Transfer Mode


WDM (Wavelength Division Multiplexing) and DWDM (Dense
Wavelength Division Multiplexing) for fiber
-
optic cable


ARPANET, the first packet
-
switched network


1971


Ethernet, developed by Xerox, DEC, and Intel


1974


Token Ring in IBM environment, Ethernet for the rest


Client
-
Server over LAN, MAN, WAN signaled the beginning of
modern data communications

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Outline


Defining Data Communications Needs


The Data Revolution


Applications and Key Enablers


Communications Technologies as Enablers


Corporate Infrastructure Changes


The Data Network of the Twentieth Century

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Data Communications Takes the Lead

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Key Services and Switching Techniques


Private lines


X.25


a packet
-
switched network over telephone network


IP


Narrow
-
band ISDN: a type of circuit
-
switched telephone network
system


DSL (Digital Subscriber Line) and Cable


data at higher freq, voice
at lower freq


Vo packet


MPLS (Multiprotocol Label Switching)


simulates a circuit
-
switched
N/W over a packet
-
switched N/W


Circuit switching


Frame Relay


Asynchronous Transfer Mode (ATM)


SONET (Synchronous Optical Networking) and Dense Wavelength
Division Multiplexing (DWDM)

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Data Communications Takes the Lead
(cont’d)

64kbps/1.544Mbps

44.736Mbps

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Outline


Defining Data Communications Needs


The Data Revolution


Applications and Key Enablers


Communications Technologies as Enablers


Corporate Infrastructure Changes


The Data Network of the Twentieth Century

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Application Demand for Bandwidth

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Application Demand for Bandwidth
(cont’d)

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New Multimedia Applications

Multimedia: the combination and presentation of multiple forms for data to
the user (voice, video, and data interactive)

ATM supports delay
-
sensitive traffic

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Outline


Defining Data Communications Needs


The Data Revolution


Applications and Key Enablers


Communications Technologies as Enablers


Corporate Infrastructure Changes


The Data Network of the Twentieth Century

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S
-
Curves of Technological Evolution

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FR, ATM, and IP Technology Enablers

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Outline


Defining Data Communications Needs


The Data Revolution


Applications and Key Enablers


Communications Technologies as Enablers


Corporate Infrastructure Changes


The Data Network of the Twentieth Century

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Corporate Infrastructure Changes


High performance fiber
-
optic facilities based on
SONET, WDM, DWDM


From centralized to distributed processing,
distributed computing, client
-
server, and IP
internetworking


Shared media to wire
-
speed switch


Etc.

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WAN Transmission Infrastructure
Evolution


The majority of WAN transmission infrastructures is
based on fiber
-
optic facilities


Satellite communications provide connectivity to remote
areas. Some designed to handle ATM traffic


Fiber
-
optic transmission using DWDM has replaced
microwave and digital transmission


Etc.

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From Centralized to Distributed Networks


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Flattening


Moving from hierarchical
structure to a distributed
structure


In other words, fewer
network elements but
greater logical
interconnection

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Definitions


Local Area Network (LAN) <= 0.1 km (350 ft)


Campus Area Network (CAN) <=1 km between building in the same
area


Metropolitan Area Network (MAN) <=10 km


providing regional
area connectivity (between campus)


Wide Area Network (WAN) 100
-
10,000 kms


national connectivity


Global Area Network (GAN) 1,000
-
20,000 kms


between nation


Virtual LAN (VLAN)


Storage Area Network (SAN)


high speed network used to
interconnect servers with data storage devices

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The Proliferation of LAN Switching


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Outline


Defining Data Communications Needs


The Data Revolution


Applications and Key Enablers


Communications Technologies as Enablers


Corporate Infrastructure Changes


The Data Network of the Twentieth Century

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Private and Virtual Private Networks
(VPNs)

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VPNs

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VPNs


Advantages


Reduced access and transport circuit charges


Capability to satisfy high peak bandwidth demands


Cost impacts proportional to usage


Enhanced availability and reliability


Disadvantages


Less predictable capacity availability


Less user control

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Questions?

Next Lecture

Understanding the Standards

and Their Makers