Chapter 14 Flashcards
What is Pull Technology?
User states a need before information is retrieved.
When a URL is entered into a web browser to go to a website.
What is Push Technology?
A Web server delivers information to users (who have subscribed for the service), instead of waiting for users to request the information to be sent to them
E.g. “A newer version of Adobe flash is available”
Builds customer loyalty
Improves business relationships and customer service
What are Application Service Providers?
Provides access to software or a service at a fee.
“Software as a Service” is a model in which ASPs deliver software to users for a fee (SaaS)
Software can be temporary or for long term use
Advantages of ASP’s?
-Lower Cost
-Information available quicker
-No worrying wether the software is current and up to date
-IT staff have more time to focus on programmes that are of strategic importance
-Software development cost if distributed over several clients meaning expenses in development of software can be absorbed and better software developed
-Software is kept up to date based on user requests
-Contact guarantees a certain level of technical support
-Software cost becomes a fixed monthly fee
Disadvantages of ASP?
-Integration with other software and applications might be problematic
-Software is not specifically adjusted for user needs
-Since development of applications are not controlled by organisation, applications might not address all user’s needs
What is Virtual reality?
Uses computer generated 3D images to create the illusion of interaction in a real world environment
What is CAVE?
Cave Automatic Virtual Environment
Virtual environment consisting of a cube-shaped room with projection monitors for walls
What are the types of virtual environments?
Egocentric: Totally immersed
Exocentric: Window view (no interaction)
Application of VR?
Assistance for disabled
Architectural design
Education
Flight simulation
What is a virtual world?
Simulated environment designed for users to communicate with each other through the use of avatars
What is an avatar?
2D or 3D graphical representations of people in virtual world.
What is Augmented reality?
Augments the real world with a digital overlay
Google Glass
What is mixed reality?
- Augments the real world with a digital overlay
- Mixed between virtual and augmented reality
- Usually with a headset
Might be what Facebook Meta has in mind with their metaverse
What is the uses Cloud Computing?
Widely used:
Backups
Working remotely
Chatbots
What is Grid Computing?
Combines the processing power of several computers
Users can use each other’s computer resources to solve problems involving large-scale, complex calculations.
What are the Advantages of Grid Computing?
Cost Saving
Better Reliability
Parallel processing
Scalability
What is Utility Computing?
It provides IT services on demand
Users pay for computer and storage resources at it is needed
What is cloud computing?
Incorporation of many technologies under one platform
Different resources are provided to users over internet
Business applications are accessed via a Web browser, and data is stored on providers’ server
What are the 4 types of clouds?
Public
The infrastructure runs over the Internet
Saves costs, but high privacy and security risks
Private
The infrastructure runs on a private network
More costly, but better privacy and security than public
Hybrid
Operate on private and at least one public cloud
Multicloud
Operate multiple public clouds
Community
Exclusive for organization that share common concerns
What are the security benefits of cloud computing?
Greater technical expertise
Physical separation
Fewer vulnerabilities
Better resiliency
Newer technology
Using AI
What are the security risks of cloud computing?
Privileged user access
Regulatory compliance
Data location
Data segregation
Recovery
Investigative support
Long term viability
What are the uses of nanotechnology?
Work of scientists
Smaller computers with bigger memory
Certain consumables
What is the definition of nanotechnology?
Incorporates techniques that involve the structure and composition of materials on a nanoscale
What can be the influences of nanotechnology?
Energy
Information and communication
Heavy industry
What is Blockchainand what is it used for?
Decentralized and distributed network
Used to record transactions a cross connected devices as blocks of data that cannot be altered
distributed ledger that records every transaction with high degree of accuracy
What are the uses of this New(ish) technology?
- Cryptocurrency
- Recording transactions / audit trial
- Recordkeeping
- Smart contracts
What is Cryptocurrency?
Cryptocurrency uses blockchain, but it is not the same as blockchain
Cryptocurrency = digital money
E.g. Bitcoin, Ethereum
No third party involved in transactions
What is the benefits of cryptocurrencies?
Cannot be counterfeited or reversed
Immediate settlement
Lower transaction fees
No risk for credit theft
Available to anyone
Truly international across borders and currencies
What are the disadvantages of Cryptocurrencies?
Not widely accepted
No way to reverse payment
Lack of regulation
Data loss = money loss
Price volatility and manipulation
Not easy to convert to USD/ZAR etc
What is Quantum computing?
Uses quantum mechanics to generate and manipulate quantum bits (qubits).
Qubits represents a 1 and 0 at the same time = called superposition
Built for specific applications
Decryption
Data analysis
Forecasts
Not in wide use yet. Still experimental phase!
