part 4 Flashcards
(22 cards)
Systems Development Life Cycle (SDLC)
- Planning
- Identify problems, opportunities and objectives - Analysis
- Determine information requirements - Design
- Design the system that was recommended and approved at the end of the analysis phase - Implementation
- System is installed and preparations are made to move from the old system to the new - Maintenance
- Longest phase, involves the ongoing maintenance of the project
connectivity map
Series of connectivity maps are networking modeling tools that depict various locations involved over wide and local areas and interconnections between those locations
Wide Area Connectivity Map
- Shows big picture of geographic locations of network facilities
- External users and mobile users can be identified, as well as the locations primary to a business
Local Area Overview Connectivity Map
Shows the big picture design of a local area network
Local Area Detailed Connectivity Map
Shows the close-up design of a local area network, including switches, routers, hubs, and servers
technically feasible
Proposed system can be created and implemented using currently existing technology
financially feasible
Proposed system can be built given the company’s current financial ability
- Payback analysis a good technique to use to determine financial feasibility
operationally feasible
System operates as designed and implemented
time feasible
System can be constructed in an agreed upon time frame
capacity planning
A computer simulation involves modeling an existing system or proposed system using a computer-based simulation tool
benchmarking
Generating system statistics under a controlled environment and then comparing those statistics against known measurements
analytical modeling
Involves the creation of mathematical equations to calculate various network values
Creating a Baseline
- Involves measurement and recording of a network’s state of operation over given period of time
- Used to determine current network performance and to help determine future network needs
- Should be an ongoing project
Procedure to Create a Baseline
- Collect information on number and type of system nodes, including workstations, routers, bridges, switches, hubs and servers
- Create an up-to-date roadmap of all nodes along with model numbers, serial numbers, and any address information such as IP or Ethernet addresses
- Collect information on operational protocols used throughout the system
- List all network applications, including the number, type and utilization level
- Create a fairly extensive list of statistics to help meet your goals (i.e. average network utilization)
Mean Time Between Failures (MTBF)
Average time a device or system will operate before it fails
Mean Time to Repair (MTTR)
Average time necessary to repair a future within the computer system
Availability
Probability that a particular component or system will be available during a fixed time period
availability % = (total available time - downtime) / total available time
Cyberethics
The study of moral, legal, and social issues involving cybertechnology
Professional Ethics
- Concerned with moral issues that affect computer professionals
- A professional is one who recognizes his or her obligation to society by living up to established and accepted codes of conduct
Professional Codes of Ethics and Codes of Conduct
- Association for Computing Machinery (ACM)
- Institute for Electrical and Electronics Engineers - Computer Society (IEEE-CS)
- Australian Computer Society (ACS)
ACS Code of Professional Conduct
- Primacy of the public interest
- Enhancement of quality of life
- Honesty
- Competence
- Professional development
- Professionalism
Purpose of Professional Codes
- They are ethics designed to motivate members of an association to behave in certain ways
- They inspire, guide, educate and discipline members
- Codes inform the public about the nature and roles of the profession
- Codes enhance the profession in the eyes of the public
