C182 Flashcards
What is the purpose of SDLC (System Development Life Cycle)?
Planning, creating, testing, & deploying information systems including software and hardware
What are the SDLC steps?
Preliminary Investigation Analysis Logical Design Physical Design Implementation Maintenance
Whats involved in the Preliminary Investigation SDLC stage?
Discovery of a problem or opportunity.
Assessment of feasibility (cost, benefits) and selects a development methodology - Step 1
Whats involved in the Analysis SDLC stage?
Determines user requirements & develops logical models of the system (demonstrations) - Step 2
Whats involved in the Logical Design SDLC stage?
Revised to ensure the new system will meet user requirements - Step 3
Whats involved in the Physical Design SDLC stage?
Logical models are converted to physical models. Includes network maps, servers, & devices needed. - Step 4
Whats involved in the Implementation SDLC stage?
Development of databases and software programs. Hardware installation. - Step 5
Whats involved in the Maintenance SDLC stage?
Modifications & Corrections - Step 6
What is Alpha testing?
End users assisted by developers; system tested with simulated data
What is Beta testing?
End users test the system w/o help from developers; using actual data
What is User Acceptance testing?
End users test the system in operational setting to see if it is useful
Alpha, beta, and user acceptance testing occurs during which SDLC step?
Implementation
What are 3 steps that occur during deployment?
System Conversion
Final Documentation
End-user training
System conversion can occur as …
Direct
Parallel
Pilot
Phased
Old system is “turned off” and the new system is “turned on” at a specific date & time.
Direct Conversion
A period in time which both systems operate concurrently.
Parallel Conversion
Conversion starts with a group of end-users, then deployed on a larger scale.
Pilot Conversion
Team deploys a subset of the system first rather than deploying the whole system at once.
Phased Conversion
The ability of an organization to recover from a disaster is directly related to their …
BPC (business continuity plan)
What creates a copy of everything on the system including the operating system, configuration files, data, and so on?
Image backups
Examples of backup media
Magnetic tapes, DVDs, CDs, other hard drives, cloud storage
An initial full backup is performed and then subsequent backups only capture the changes since the last backup
Incremental backups
When a system writes data to multiple hard drives at the same time to prevent loss of data.
Data mirroring
A physical location we’re an organization can move it’s operations in case of a natural disaster or terrorist attack
Hot site
A physical location that is a shell without equipment in case of a natural disaster or terrorist attack
Cold site
Multiple data centers in disparate regions
Site sharing
What network does Bluetooth operate on?
short range ad hoc network called Piconet
Which organization supplied a guide for Bluetooth security?
National Institute of Standards and Technologies (NIST)
What is a drawback for using IPv4 addressing scheme?
The devices that are limited to using IPv4 are 4.3 billion
What is the major benefit of using IPv6?
A greater number of devices can be connected
Refers to data sets that are so enormous and multifaceted that they will require more sophisticated database management/processing tools than we currently use.
Big Data
which services can businesses can access and use software through the Internet?
SaaS
Which service is able to quickly and reliably develop and deliver applications?
PaaS
Which service supplies resources (e.g., servers, data storage) an IT department needs are located outside of the organization and are accessible by anyone, anywhere?
IaaS
