Exam Flashcards
4 factors of peer to peer network (pp) vs Client server network (cs)
Cost saving- no server needed all computers can be the same (pp) vs more expensive as servers are expensive to buy (cs)
Status- all machiens the same status (pp) vs one machien may be more important than rest (cs)
Network size- only suitabie for small networks 15 or less (pp) vs more efficient/load toletant for larher networks (cs)
Security- poorer as respources are shared (pp) vs security better as its crntralised and one persons responsibility
2 examples of distributed computing
- ) popular power project- to develop flu vaccine
- ) SETI- by NASA searching for extraterrestrial intelligence, current technology gives the ability to discover cosmic habitation
3 Advantages if distributed computing
- Reduces cost as no powerful computer is needed
- Improved performance as each computer can work on part of the data
- Can pass work to other computers anywhere in the world using the internet
3 Disadvantages of distributed computing
- Issues with security- data spread over many different computers/locations
- Heavy reliance on network or communications that may not always be reliable
- Increased costs owing to the use of expensive communication lines
Factors of HCI
Expert- advanced shortcuts to make it quicker, professional desktop publishing
Novice- (child) minimal text, bright colours, visual prompts
Disabled- software customisable e.g braille keyboard
Definition of online shopping
Customers can purchase products directly from companies website with the use of interney connection
3 Advantages of online shopping
- Customers can order goods 24/7
- Do not need to spend time travelling
- Allows disabled people to shop more easily
Disadvantages of online shopping
- Risk of debit/credit card fraud
- Customers cannit try before buying
- If server goes doen this expensive for the buisiness
Legal and moral factors
Intellectual property rights
L= computer misuse act- do not copy programes, files, data, music
M= should you use a resource you found on the internet ?
Misinformation
L= estate ahents puttibg false infomation on adverts
M= not informing potention customers of all facts concerning product/services (imminenr new model)
Privacy
L= data protection act- illegal to sell on peoples details
M= employee usong customer details (company data) to creat mailing list for own personal buiness
6 stages of risk analysis
- (Initial risk) Fire, flood, tsunsmi, powercur
- What is the likelihood?
- (Example) tsunami unlikely to happen in Newport
- Short and long term concequences- loss of sales to loss of reputation or bancrupsy
- Would they be able to deal with this threat?
- May need a back up recovery plan
E-commerce 3 types advantages and disadvantages
B2B (selling flights, reserving seats) A- order goods 24/7, no travel D- risk of debit/credit card fraud
B2C (Online marketplace) A- larger customer base, easier for disabled users D- Can’t try before buy, expensive if server goes down
C2C (Amazon) A- Quick to use D- generally associated with fraud
Advantages and disadvantages of e-commerce to customer
A Convenient/no travel Global marketplace Disabled user shop easier 24/7 availability D Lack of in store engagement Security- giving personal details
Advantages and disadvantages of E-commerce to business
A Wider customer base Can sell 24/7 More efficient customer targeting D Need for trained staff Cost of maintaining website Fewer shops on high street
Explain data mining
Turns raw data into useful information (loyalty card) by looking at shopping patterns A Vouchers Personalised emails Increased profit Identify trends D Privacy concerns Repetitive Cost for business Technical skills of staff
Definition of data warehouse
A large collection of archived data used for decision making
Definition of distributed computing with examples
A series of computers networked together each working on the same problem
e. g. SETI- search for intelligent life outside of earth using a radio telescope in order to search for the narrow bandwidth signals lots of computing power needed
e. g. Popular power project used to research flu vaccines
Advantages and disadvantages of distributed computing
A
Reduces cost as expensive supercomputer not needed
Can pass work to computers anywhere in the world
Performance as each computers works on a different part of data
D
Security issues as data spread out on multiple computers
Heaving reliance on network connections
Increased cost for communication lines
Definition of cloud computing
Storage of files online through internet connection, enabling companies to develop applications for staff and customers using PC or mobile device.
Can access generic cloud based office applications like Google doc
Advantages and disadvantages of cloud computing
A
Cost- do not have to buy expensive hardware
Filed can be accessed and backed up remotely
Collaboration made easier, environment
D
Reliable internet connection needed
Online version of software may not have same functionality
HCI: novice, expert, disabled, children
Novice= wizards, step by step prompts, tutorials Expert= short cuts, more complex Disabled= braille for blind, tracker ball for coordination, large print for VI Children= colourful, less text, animations, voice prompts
Teleworking definition
Working from home using computer networks and ICT, using high speed internet, computer, software/programs, mobile phone, email and webcam
Teleworking advantages and disadvantages
A Allows people to live/work where they choose Ideal for disabled users Saves time and money Reduced office costs Can employ from anywhere Staff less likely to be off sick D Home costs- heating and electricity Boundary between home and work May feel isolated Can’t see how hard staff are working Harder to manage
Video conferencing advantages and disadvantages
Used for meetings with live video and audio using computer networks
A
More times to spend at home/other life commitments
No commuting to expenses
D
Individuals feel self conscious, less likely to contribute
Poor image quality may occur with poor connectivity - need for fast reliable internet
Code of conduct definition
A set of rules to be signed by employees which states specified guidelines with regards to ICT equipment
