welcome to ict in business outcome 2
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Welcome to ICT IN Business Outcome 2. During this outcome you will learn about Electronic Data Communication Systems. By the end of this programme, you should be able to:. By the end of this programme, you should be able to:. Describe different data communications systems - PowerPoint PPT PresentationTRANSCRIPT
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Welcome to ICT IN Business Welcome to ICT IN Business Outcome 2Outcome 2
During this outcome you will learn about Electronic Data Communication Systems
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By the end of this programme, you should be able to:By the end of this programme, you should be able to:
Describe different data communications systems
Evaluate different data communications systems
Identify security threats and procedures
Describe new ICT innovations
Evaluate new ICT innovations
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INTERNET
SECURITYINNOVATION
COMMUNICATION
TOPOLOGY
OUTCOME 2OUTCOME 2OUTCOME 3OUTCOME 2
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What is … All organisations need good communication systems if they are to be successful.
THE COMMUNICATION PROCESS
DATA INFORMATION DECISION
IMPLEMENTREVIEWFEEDBACK
COMMUNICATION SYSTEMS
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Improves communication within and between organisations
Reduces costs
Improves quality of information
Improves availability of information
Allows sharing of resources
Allows for flexible working
Promotes collaboration
Contributes to success of business
BENEFITS OF ELECTRONIC COMMUNICATION SYSTEMS
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WHAT IS A NETWORK?
A network is two or more computer systems linked by a communication medium such as cable, telephone line, radio waves, satellite or infra-red light.
A network will provide the following benefits:
Sharing of information
Sharing of resources
Improve efficiency
Allow electronic communication
TYPES OF NETWORK
The main types of network are:
Local Area Network (LAN)
Wide Area Network (WAN)
Metropolitan Area Network (MAN)
Click here to learn more about different types of networks
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LOCAL AREA NETWORK
A Local Area Network generally has the following characteristics:
Confined to a relatively small area
Limited to a particular building
Computers usually less than 1 mile apart
Used by small to medium sized businesses
File Server
HOW A LAN WORKS
A computer called a file server controls the network by sending files from its disk drive to all parts of the system.
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WIDE AREA NETWORK
A Wide Area Network generally has the following characteristics:
covers a wide geographical area
used by large organisations
connected by telephone line, leased line or satellite
provides online conferencing between
employees in different locations
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NETWORK HARDWARE
The following components are used in computer networks
Servers
Clients or Workstations
Routers
Hubs
Switches
Network Interface Cards
Click on the above image and then on devices to find out more about network components
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OPERATING SYSTEMS
The two main types of network operating systems are:
Client/Server
Peer to Peer
Click here and then on network types to find out more
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NETWORK TOPOLOGIES
Network topology refers to the physical layout of the network systems.
The main topologies are
Bus
Ring
Star
Mesh
HybridClick on the this image and then on topologies to find out more
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INTERNET
The Internet is a network of networks that links computers across the world.It consists of servers and communications links between them.
Click on the image below for more information.
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BUSINESS USES OF THE NET
Email provides a quick and cheap method of communication
World Wide Web provides means of publishing company information globally
File Transfer allows files to be transferred across the internet
Newsgroups are discussion forums that can be used for market research purposes
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SECURITY THREATS
Hackers
FireTheft
Power Surge
Accidental Damage
DisclosureFlood
Power Failure
Data Deletion
Data Modification
Virus
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SECURITY PROCEDURES
Good practice involves:
Development of security policy
Allocation of responsibilities
Security training
Incident reporting
Implementing Security Measures
Reviewing and updating Security Measures
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SECURITY MEASURES
Fireproof cabinets Positioning of computer to minimise unauthorised use Shred confidential printouts Passwords Door Locks Identification System Equipment Log Burglar Alarms Regular Back-ups Install anti-virus software Encryption System Install firewall
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INNOVATION
Tasks
OUTCOME 3
Links
Broadband
Wi-fi
Innovation
XML
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LINKS
http://www.zdnet.com
http://technology.guardian.co.uk/
http://www.microsoft.com/homepage/ms.htm
http://news.bbc.co.uk/1/hi/technology/default.stm
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You have now completed this tutorial
Click here to return to the home page
OPERATING SYSTEMS
Client/Server In a client/server system resources are controlled by a central computer called a file server. Client resources are accessed through the server
OUTCOME 2
OPERATING SYSTEMS
Peer to PeerA peer-to-peer system does not have a dedicated server. Each computer may act as both a client and a server. Users can share folders and peripherals.
OUTCOME 2
FIREWALL
Firewall A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria
OUTCOME 2