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Communication System And Computer Network - Coggle Diagram
Communication System And Computer
Network
computer communications
Process in which two or more computers or devices transfer data, instructions, and information
Uses of Computer Communications
Text messaging
Picture/video messaging
Wireless instant
messaging
Networks
Collection of computers and devices connected via communications devices and transmission media
intranet
Internal network that uses Internet technologies
Makes information accessible to employees
Networks Classifications
local area network (LAN)
metropolitan area
network (MAN)
wide area network
(WAN)
Networks Architecture
client/server network
peer-to-peer
network
Internet peer-to-peer (P2P)
Networks Topology
bus network
ring network
star network
Network Communications Standards
Bluetooth
Network Communications Standards
UWB
IrDA
RFID
WiMAX
Wireless Applications
Protocol (WAP)
communications software
Programs that help users establish connection to Internet, other network, or another computer
Programs that help users manage transmission of data, instructions, and information
Programs that provide an interface for users to communicate with one another
Communications Over the Telephone Network
public switched
telephone network (PSTN)
Worldwide telephone system that handles voice-oriented telephone calls
dial-up line
Temporary connection using telephone line for communications
Communications Devices
Common types are dial-up modems, ISDN and DSL modems, cable modems, wireless modems, network cards, wireless access points, routers, and hubs
ISDN and DSL modems send and receive data from ISDN and DSL lines
dial-up modem
converts digital signals to analog signals and vice versa
cable modem
Sends and receives data over cable television network
wireless modem
Typically use the same waves used by cellular telephones
network card
Sometimes called network interface card (NIC)
wireless access point
Central communications device that allows computers and devices to transfer data wirelessly among themselves or wirelessly to a wired network
router
Connects computers and transmits data to correct destination on network
hub or switch
Device that provides central point for cables in network
Home Networks
Multiple computers connected in home
Ethernet
Powerline cable
Phoneline
Communications Channel
Transmission media on which data travels in communications system
Transmission media
Bandwidth
Physical Transmission Media
twisted-pair cable
coaxial cable
fiber-optic cable
Wireless Transmission Media
Infrared
broadcast radio
cellular radio
microwave station
communications satellite