Please enable JavaScript.
Coggle requires JavaScript to display documents.
Computer Technology in Communication (Network (Network usage (facilitate…
Computer Technology in Communication
Digital Communication
process in which two or more computers/devices transfer data, instruction & information
communications & transmission media involves cables & wires or wireless
5 Components
Sender/sending devices
Receiver/receiving devices
Message
Medium (communication channel)
Protocol (set of roles that govern the communication)
Network
a set of devices (nodes) connected by communication devices & transmission media
nodes: printer, computer,...
require both hardware & software to work
hardware: access point, routers, switches, cables
software: OS, apps
Network usage
facilitate communication
transfer funds
share software &hardware
share data & information
Types of Network
Area of Coverage: geographical area that a network can reach
PAN: Personal Area Network (Bluetooth, Wi-Fi, infrared or cables)
BAN: Body Area Network/Body Sensor Network (to monitor health data)
LAN: Local Area Network (home, school, office building, closely positioned group of buildings)
MAN: Metropolitan Area Network
(town, city)
**WAN: Wide Area Network
(city, state, region,country & the world) the largest WAN=Internet
Network Architecture
the configuration of computers, devices, and media on a network
2 types
:
client/server
(Typically for 10 or more computers, but can connect smaller number of computers)
peer-to-peer
(typically connects fewer than 10 computers)
Network Topology
(physical topology)
the arrangement or layout of computers/devices on a network
5 topologies
ring
star
bus
tree
mesh
hybrid topology: mix-and-match topology
The Internet
(INTERconnected NETwork)
Internet & WWW not the same
Internet is a network
WWW is a collection of electronic documents
access information
send/post messages
communicate with friends and family
Communication devices, lines &transmission media
Devices:
any type of hardware capable of transmitting data , instructions, & information between a sender and a receiver through transmission media.
(modems, wireless access points, routers, network cards, hubs & switches)
Lines:
a dedicated line is a type of always-on physical connection that is established between 2 communications devices
(cable, Digital Subscriber Line, FTTP, T-Carrier, Asynchronous Transfer Mode (ATM)
)
Transmission media:
materials or substances that carry communication signals.
2 types of transmission media: physical & wireless
Physical transmission media: twisted pair cable (copper), coaxial cable (copper), fiber-optic cable (glass/plastic)
Wireless transmission media: infrared, broadcast radio, microwaves, communication satellites
Communication Standards & Protocols
Standards
: Ethernet, Token ring, Wi-Fi, Long Term Evolution, Ultra-wideband, Infrared Data Association (IrDA)
Protocols
: Transmission Control, Protocol/Internet Protocol (TCP/IP), Bluetooth, Radio Frequency Identification (RFID), Near Field Communication (NFC)
Mobile Networks
Based on cellular network
Benefits of 5G
Improved broadband and faster Internet
Public safety and infrastructure
Autonomous vehicles
Improved healthcare
Remote devices access
Internet of Things
G=Generation 1G, 2G, 3G, 4G, 5G, 6G (3G onwards is high speed data)