data communication (simple explanation)
DESCRIPTION
this presentation shows some simple knowledge of data communication.TRANSCRIPT
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DATA COMMUNICATION
Presented by: Md. Akid Sultan Khan
ID:1104067CSE,CUET.
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Objective
Explain Data Communication.Show some simple diagram for Data
Communication.Explain about modems.Explain various wireless
communication.
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Aim
Show some aspects of Data Communication & types of varieties in this extra-ordinary sector of communication.
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Definition
Refers to the moving or transferring of data between two electronic devices.
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Simple Data Communication system
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Data Communications over Standard Telephone Lines - Modems
Most telephone lines are analog, not digital.
modem converts it from analog format to digital format.
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`
The analog signal(audible)
is sent throughtelephone lines.
MODEM MODEM 011010001011010001
Digital signal Digital signal
This modem convertsdigital to analog.
This modem convertsanalog to digital.
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Internal Modem
External Modem
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Using Digital Data Connections
Dedicate to transmitting data in digital format.
Transmit data at much higher speeds than standard analog phone lines.
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Diagram of digital data connections1 2
3
4
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Broadband Connectionstransmit data faster than is possible
through a standard dial up connection using a modem.
The most commonly used digital telephone services are:
ISDN,T1 and T3 DSL Cable Modems ATM
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Wireless communication
Use RF or IR to transmit data between devices on LAN.
Wireless signals are electromagnetic waves that can travel through a vacuum of outer space.
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Categories of wireless Communication
WLAN
WAN
WIMAX
WiFi
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Local Area Networks (LANs)
Connected by a cable, infrared link, or small transmitters.
Transmits data by breaking it into small pieces.
Every LAN uses a protocol.
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LAN Communication Sample
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Wide Area Networks (WANs)
transmit data over leased high-speed phone lines or wireless links such as satellites.
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LAN 1LAN 2
WAN
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WiMAX
Provide 30 to 40 megabit-per-second data rates.
Enable to delivery of last mile wireless broadband access .
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Simple WiMAX Communication system
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Wi-Fi
radio waves to provide wireless high-speed internet and network connections
easily accessible in the corporate infrastructures
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Simple WiFi System
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ConclusionIn this presentation we
Explain how computer data travels over telephone lines.
Explain a modem’s function.Differentiate four types of digital data
connections.Describe how wireless networks
functions.
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Thanks To All
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AnyQuestions???