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Communications And Network
Wireless TransmissionMedia
Cellular radio
Microwaves
A communications satellite
Communications channel
ฺBandwidth
Latency
Transmission
Broadband
Home Networks
connect to the internet
share a single high-speedinternet connection
Access file and programs onother computer
Share peripherals
Play multi-player games
Connect game consoles tothe internet
Subscribe to and use VolP
Communications Devices
DSL modem
Cable modem
Wireless moden
uses the cell phone networkto connect to the internet
Network card
A router connects multiplecomputer or other routers
Communications over thetelephone network
Dial-up lines
Dedicated line
ISDN line
DSL
FTTP
T-carrier
ATM
Communications Software
Help users establish aconnection to another computeror network
Manage the transmission ofdata, instructions, andinfornation
Provide an interface for usersto communicate with oneanother
Communication
Sending device
Communication channel
Receiving device
Network CommunicationsStadndards
Ethernet
a network standard that specifies nocomputer controls when data can betransmitted
Token ring
the standard specifies that computers anddevices on the network share or pass aspecial signal
TCP/IP
A network standard that defines howmessages are routed from one end of anetwork to another
Wi-Fi
Bluetooth
UWB
Specifies how two UWB devices useshort-range radio signals tocommunicate
IrDA
Transmits data wirelessly viainfrared light waves
RFID
Uses radio signals to communicate with atag placed in or attached to an object,animal, orperson
WiMAX
WAP
Uses of computercommunications
Blogs
Chatroom
E-mail
Fax
Internet
Web
Wikis
Video conferrencing
Instant messaging
ETC.
Network
Advantages of network
Sharing hardware
Facilitating communications
Sharing data and information
Sharing Software
Transferring funds
A local area network (Lan)
A wireless Lan
A wide area network
P2P
An internet network on whichuser access each other's harddisk
Objectives Overview
Discuss the purpose of thecomponents required forsuccessful communication
Describe the uses ofcomputer communication
differentiate among a starnetwork , bus network , and ringnetwork
describe the various networkcommunication standard