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this presentation shows some simple knowledge of data communication.
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DATA COMMUNICATION
Presented by: Md. Akid Sultan Khan
ID:1104067CSE,CUET.
Objective
Explain Data Communication.Show some simple diagram for Data
Communication.Explain about modems.Explain various wireless
communication.
Aim
Show some aspects of Data Communication & types of varieties in this extra-ordinary sector of communication.
Definition
Refers to the moving or transferring of data between two electronic devices.
Simple Data Communication system
Data Communications over Standard Telephone Lines - Modems
Most telephone lines are analog, not digital.
modem converts it from analog format to digital format.
`
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.
Internal Modem
External Modem
Using Digital Data Connections
Dedicate to transmitting data in digital format.
Transmit data at much higher speeds than standard analog phone lines.
Diagram of digital data connections1 2
3
4
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
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.
Categories of wireless Communication
WLAN
WAN
WIMAX
WiFi
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.
LAN Communication Sample
Wide Area Networks (WANs)
transmit data over leased high-speed phone lines or wireless links such as satellites.
LAN 1LAN 2
WAN
WiMAX
Provide 30 to 40 megabit-per-second data rates.
Enable to delivery of last mile wireless broadband access .
Simple WiMAX Communication system
Wi-Fi
radio waves to provide wireless high-speed internet and network connections
easily accessible in the corporate infrastructures
Simple WiFi System
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.
Thanks To All
AnyQuestions???