unit 5 communication network
TRANSCRIPT
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1. Modem.
2. Modem Interfacing.
3. WAN & LAN.
4. Definition1. Transmission Speed
2. LAN Application.
3. Client - Server Computing.
4. LAN Component.
5. New network System (i.e. CANBUS, PROFIBUS,FIELDBUS).
6. Internet.
7. E-mail
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Defined modem.
Sketch modem interfacing.
Defined Wide Area network.
Defined Local Area Network.
Explain Transmission speed.
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Modem (Modulate/demodulate)
Transmission speed speed at which modem transmit data
measurement - bits per second (bps) or kilobitsper second (kbps)
Computers use digital signaland some communicationchannel uses analog signals.
Convert digital signal to ananalog signal and vice versa
http://images.google.com.my/imgres?imgurl=http://cd.tradehelper.or.kr/member/brad/ADSL%2520Modem.jpgjpg&imgrefurl=http://cd.tradehelper.or.kr/showroom/category.asp%3Fhscode%3D84&h=1912&w=2944&sz=1042&hl=en&start=6&tbnid=GDidHeTY5H-EgM:&tbnh=97&tbnw=150&prev=/images%3Fq%3DMODEM%26gbv%3D2%26svnum%3D10%26hl%3Den -
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MODULATION DEMODULATION
MODEM
To convert a digital
signal into an
analog signal
To convert an
analog signal into a
digital signal
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Type of Modem
External Modem Internal Modem
PC Card Modem
Wireless Modem
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long distance transmission over large
geographical area (continent/world)
Utilize public, leased or private
communication in combinationsAn enterprise network is a WAN owned by one
company
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Middle ground between LAN and WAN
Private or public network
High speed
Large area
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Size limited to a few kilometers
Common topologies are bus, ring andstar
High data rate 4/10/16 Mbps to 100
Mbps or gigabits.
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Peer to Peer Network
Server Based Network
Client / Server Network
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Small network that
shares hardware, data or
information located onany computer in the
network
Each computer is called
peer
printer may be used by
all computers on networkprinter may be used by
all computers on network
network operating
system and
application software
installed on eachcomputer
network operating
system and
application software
installed on eachcomputer
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a server stores all the network files and
applications.
Network operation manage by Network
Operating System (NOS)Examples : Mail server, Print Server,
Communication Server.
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Server 1 or more computer that controls the network
Client other computers that can request services from
the server
client client client
serverlaser printer
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The topology describe the way
Star
Ring
BusTree
Fully connected network or mesh
Hybrid
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Bus network
All computers and devices connect to central cableor bus
Inexpensive and easy to install
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Ring networkCable forms closed ring,
or loop, with allcomputers and devicesarranged along ring
Data travels from deviceto device around entirering,in one direction
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Star network
All devices connect toa central computer,called the hub
All data transferred
from one computer toanother passesthrough hub HUB
printer
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CANBUS
- controller-area network
-vehicle bus standard designed to allow microcontrollersand devices to communicate with each other within avehicle without a host computer.
PROFIBUS
- The goal was to implement and spread the use of a
bit-serial field bus based on the basic requirements of thefield device interfaces.
FIELDBUS
- A control network used in process control and industrial
automation.
http://www.answers.com/topic/vehicle-bushttp://www.answers.com/topic/microcontrollerhttp://www.answers.com/topic/host-networkhttp://www.answers.com/topic/bit-serial-1http://www.answers.com/topic/bit-serial-1http://www.answers.com/topic/host-networkhttp://www.answers.com/topic/microcontrollerhttp://www.answers.com/topic/vehicle-bus -
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Internet is worldwide collection of networks that links
millions of computers together
allows all of the computers to communicate with one
another
E-mail
Information Shopping
Meeting people
Entertainment
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Internet Protocol (IP)
language that computers use to communicate over theInternet
http://www.mmu.edu.my/~fosee/staff/jun.html
Protocol DomainName Path File Name
IP Address- Unique identifying number
- E.g. 10.0.48.50, 209.11.168.133, 74.125.19.99,209.131.36.158
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A system of world-wide
electronic communication in which a
computer user can compose a message at
one terminal that can be regenerated at the
recipient's terminal when the recipient
logs in.