BSc. Eng., MSc, CEng, FIE(SL), FIET(UK), CITP(UK), MBCS(UK), MIEEE (USA)

apprehensiveheehawNetworking and Communications

Oct 26, 2013 (3 years and 7 months ago)

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Mr.
Thilak

d
e Silva.

BSc
. Eng.,
MSc
,
CEng
, FIE(SL), FIET(UK), CITP(UK),
MBCS(UK), MIEEE (USA)


M.Sc. in IT
-

Year 1 Semester II
-

2012


About ACN.


Reference Books.


Data Communication.


Computer Networks.



M.Sc. in IT
-

Year 1 Semester II
-

2012


Assignment 01


After
4

weeks of lecture


Assignment 02


After
8

weeks of lecture


Assignment 03


After
12
weeks of lecture


Final examination



Assignment documentations


IEEE Standard

M.Sc. in IT
-

Year 1 Semester II
-

2012

M.Sc. in IT
-

Year 1 Semester II
-

2012

Forouzan

-

TCP/IP protocol
suite

Forouzan

-

Data Communication
and Networking

Tanenbaum



Computer
Networks

Top Down Network
Design
-

CISCO

William Stallings
-

Data and
computer communications

Hasall



Data communications,
computer networks and open
systems


Images


Amazon.com


To introduce the subject content of Advanced
Computer Networks (545).



At the end of the session you will get a brief
idea about data communication and
computer networks.

M.Sc. in IT
-

Year 1 Semester II
-

2012


You

will

be

learning

about

two

major

parts

in

Networking

in

this

lecture

series
.



Data

Communication


Data

transmission


Signals


Transmission

media

and

characteristics



Computer

Networking



Networks

(LAN,MAN,WAN,PAN)



Core

and

Access

Networks

(WAN)



Standard

Bodies




M.Sc. in IT
-

Year 1 Semester II
-

2012


Transporting data/information from one
place to another.


Data is in Memory.


A series of
-

1000101010101110.


Originates from applications.


Data are converted to Signals when
travelling.

M.Sc. in IT
-

Year 1 Semester II
-

2012

ID for data,

ID for
destination

















M.Sc. in IT
-

Year 1 Semester II
-

2012

Coding

Data

Security

Encryption

Compressio
n

Dividing to
sessions

Application

Handle

errors

Convert data
to signal

Transmission
media

Error
correction


All Signals travels as Electro Magnetic waves.


There are three main types of signals


Electrical signals


Optical signals


Transmitting in Free Space


M.Sc. in IT
-

Year 1 Semester II
-

2012


Signals travel through transmission media.



Speed of the signal depends on transmission
media.








Frequency can be in Hz, MHz, KHz, GHz, or
THz.



M.Sc. in IT
-

Year 1 Semester II
-

2012

Signal

Transmission media

Speed

Electrical signals

Copper


2*10 ms

Optical signals

Fiber


3*10 ms

Free Space


Radio


3*10 ms


8

-
1

10

-
1

10

-
1

M.Sc. in IT
-

Year 1 Semester II
-

2012

Source :
http://content.answcdn.com/main/content/img/oxford/Oxford_Photo/0198662718.electromagneticspectrum.2.jpg


AM Radio


in KHz range


FM Radio/TV


in MHz range


Mobile/satellite/Microwave


in GHz range


Optical signals


in THz range



Optical signal range is divided in to two,


Visible range (from Violet to Red)


Invisible range (Infrared
-

IR , ultraviolet


UV)


M.Sc. in IT
-

Year 1 Semester II
-

2012


Guided Media (copper, fiber)


Unguided Media (Radio)


Characteristics of transmission media


Why we learn?


To identify and eliminate errors occurring
when transmitting data and to make further
decisions.

M.Sc. in IT
-

Year 1 Semester II
-

2012


PAN (Personnel area Networks)


For private connections


Eg

:
-

data transmission between a Mobile phone
and a Notebook



LAN (Local Area Networks)


For a small geographical area


Speed
-

Ethernet

M.Sc. in IT
-

Year 1 Semester II
-

2012


MAN (Metropolitan Area Networks)


Several KM of area


Fiber optic networks


Speed


Metro Ethernet



WAN (Wide Area Networks)


For a large area


A public network.

M.Sc. in IT
-

Year 1 Semester II
-

2012

Computer Networks


You will learn about,


Behavior of LAN’s and Standards,


Ethernet


M.Sc. in IT
-

Year 1 Semester II
-

2012


You will learn about,


Core Networks and


Access Networks

M.Sc. in IT
-

Year 1 Semester II
-

2012

Core
Network

Access Network


Access Network is from customer premises to
service providers’ network.



Access Networks are divided as,


Fixed Access Networks and


Mobile Access Networks



Fixed Access Networks are further divided as,


Fixed Wired Access Networks and


Fixed Warless Access Networks


M.Sc. in IT
-

Year 1 Semester II
-

2012


Copper


Initially 4 KHz


Has used broadband technology to broaden the
bandwidth (ADSL)



Fiber


FTTH (Fiber To The Home)



Copper and Fiber


FTTN/FTTC (Fiber To The Node/ Fiber To The Cabinet)


FTTB (Fiber To The Building)




M.Sc. in IT
-

Year 1 Semester II
-

2012


FDMA


(Frequency Division Multiple Access)


TDMA


(Time Division Multiple Access)


CDMA


(Code Division Multiple Access)


Mobile Access Networks


Mobile generations

M.Sc. in IT
-

Year 1 Semester II
-

2012


Requires high bandwidth


Use fiber optic cables


By using WDM (Wave length Division
Multiplexing) one fiber can act as many
fibers.


Data should be multiplexed before
transmitting through fiber or can get data as
an Ethernet and transmit.


Can share bandwidth using MPLS.



MPLS (Multi Protocol Label Switching) etc,




Standard Bodies



ITUT


IEEE etc


M.Sc. in IT
-

Year 1 Semester II
-

2012

M.Sc. in IT
-

Year 1 Semester II
-

2012