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characteristics of communication systems
- communication systems as being those systems which enable users to send and receive data and information
- the framework in which communication systems function, demonstrated by the following model
- the functions performed within the communication systems in passing messages between source and destination, including:
- message creation
- organisation of packets at the interface between source and transmitter
- signal generation by the transmitter
- transmission
- synchronising the exchange
- addressing and routing
- error detection and correction
- security and management
- the roles of protocols in communication
- handshaking and its importance in a communications link
- functions performed by protocols at different levels
- the client–server model
- the role of the client and the server
- thin clients and fat clients
- examples of clients such as web browsers and mail clients
- examples of servers such as print servers, mail servers and web server
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- use applications to create and transmit messages
- establish a communications link and describe the steps that take place in its establishment
- identify and describe specified protocols at different stages of the communication
- identify client processing and server processing
- describe the advantages and disadvantages of client–server architecture
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examples of communication systems
- other systems dependent on communication technology such as:
- e-commerce
- EFTPOS
- electronic banking
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- use a communication system to transmit and receive audio, video and text data
- for given examples, identify the participants, information/data, information technology, need and purpose
- for given examples explain how data is transmitted and received
- for given examples, identify the advantages and disadvantages of the system
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transmitting and receiving in communication systems
- transmission media, including:
- characteristics of media in terms of speed, capacity, cost and security
- communication protocols, including:
- application level protocols
- communication control and addressing level protocols
- transmission level protocols
- strategies for error detection and error correction
- network topologies, including:
- star
- bus
- ring
- hybrid
- wireless networks
- the functions performed by the following hardware components used in communication systems
(See Course Specifications Document)
- characteristics of network operating software
- similarities and difference between the Internet, intranets and extranets
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- compare and contrast traditional communication systems with current electronic methods
- represent a communication system diagrammatically
- predict developments in communication systems based on current trends
- simulate activities involved with communication in areas such as:
- e-commerce
- EFTPOS
- Internet banking
- for a given scenario, choose and justify the most appropriate transmission media
- diagrammatically represent the topology
- describe the location and role of hardware components on the network
- compare the functions of different hardware components
- identify the main characteristics of network operating software
- compare and contrast the Internet, intranets and extranets
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other information processes in communication systems
- collecting, such as:
- the phone as the collection device with voice mail
- EFTPOS terminal as a collection device for electronic banking
- processing, including:
- encoding and decoding analog and digital signals
- formation of data packets
- routing
- encryption and decryption
- error checking
- parity bit check
- check sum
- cyclic redundancy check (CRC)
- displaying, such as
- the phone as the display device with voice mail
- EFTPOS terminal as a display device for electronic banking
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- distinguish between data in analog and digital form
- justify the need to encode and decode data
- identify where in a communication system signal conversion takes place
- describe the structure of a data packet
- describe methods to check the accuracy of data being transmitted
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managing communication systems
- network administration tasks, such as:
- adding/removing users
- assigning users to printers
- giving users file access rights
- installation of software and sharing with users
- client installation and protocol assignment
- logon and logoff procedures
- network-based applications
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- detail the network management software in a given network
- describe the role of the network administrator and conduct network administration tasks
- demonstrate logon and logoff procedures, and justify their use
- adopt procedures to manage electronic mail
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issues related to communication systems
- security
- globalisation
- changing nature of work
- interpersonal relationships
- e-crime
- legal
- virtual communities
- current and emerging trends in communications
(See Course Specifications Document)
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- describe and justify the need for ethical behaviour when using the Internet
- discuss the social and ethical issues that have arisen from use of the Internet, including:
- the availability of material normally restricte
- electronic commerce
- domination of content and control of access to the Internet
- the changing nature of social interactions
- identify the issues associated with the use of communication systems, including:
- teleconferencing systems
- messaging systems
- e-commerce
- EFTPOS
- electronic banking
- design and implement a communication system to meet an individual need
- predict developments in communication systems based on current trends
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