part 4 Flashcards
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
