Chapter 4: Computer Technology in Communication (Digital communications,…
Computer Technology in Communication
:red_flag: Process of two or more computers/devices transfer data, instruction and information.
:red_flag: Involve cables/wires, or through air (wireless).
Sender - Device that initiates instructions to transmit message.
Receiver - Device that accepts transmission of message.
Message - Data, information or instructions.
Medium - Communication channel where the message travel from sender to receiver.
Protocol - Set of rules that govern the communications.
categorized according to
Area of Coverage (geographical area)
:check: Personal Area Network (PAN) - Individual’s work space
:check: Body Area Network (BAN) - Body Sensor Network (BSN)
:check: Local Area Network (LAN) - Building (wire/cable)
:check: Wireless LAN - Single-building LAN & Multiple-building LAN
:check: Metropolitan Area Network (MAN) - Town, City
:check: Wide Area Network (WAN) - Country, World, State
:check: Client/Server - One or more computers act as the server (host computer), other computers (clients) on the network request services from the server.
:check: Peer-to-Peer - All computers have equal
responsibilities and capabilities.
:check: Ring, Star, Bus, Tree, Mesh
Internet = Network
World Wide Web (WWW) = Collection of electronic document/Service
:red_flag: Any type of hardware capable of
transmitting data, instructions, and information between a sender and a receiver through transmission media.
:red_flag: eg. Modems, router
:black_flag: A dedicated line which always-on physical connection that is establish between 2 communication device.
:black_flag: eg. Cable, Digital Subscriber Line, Fiber to the Premises (FTTP)
Communication transmission media
:red_flag: Carry communication signals.
:red_flag: Physical (Twisted pair cable, Coaxial cable, Fiber-optic cable) or Wireless (Infrared, Microwaves, Broadcast radio)
Communication standards and protocols
To ensure compatibility in moving data between the different computers and devices on across networks.
guidelines that specify the the way computers access the medium (eg. Ethernet).
is a standard that outlines characteristics of how two devices communicate on a network (eg. Radio Frequency Identification - RFID)
:star: Based on cellular network
:star: Every generation
has improvements become more faster transmission, better quality and Bandwidth.