Information Technology Flashcards
IC
Which IT personnel roles should always be segregated?
Operators
Programmers
Librarians
IC
Systems Analyst duties
Note: Think IT Manager
Designs / purchases IT system
Flowcharts
Liaison Users and Programmers
IC
Systems Administrator duties
Primary: Control database access.
Writes- Updates- Maintains- & Tests
Software, Systems and compilers
IC
Duties a Systems Programmer should NOT have?
APPLICATION programming
Operator on the system.
IC
Systems Operator duties
Schedules and Monitors Jobs
Runs IT Help Desk
IC
Duties a System Operator should NOT have?
Should not be a Programmer on the system.
IC
If it is not possible to segregate duties in an IT System-
what actions should be taken to compensate for internal control purposes?
Include Computer Logs.
Control Group should review the logs.
SYSTEMS
Management Information System (MIS) purpose
provide past, present, future information
for planning, organizing, controlling operations.
SYSTEMS
What is an Accounting Information System (AIS)?
A type of MIS that processes accounting transactions.
SYSTEMS
Executive Information System (EIS) characteristics
Specialized for Company Executive needs
Assists with Strategy Only
No Decision-Making Capabilities
SYSTEMS
Expert System (ES) characteristics
* type of AI
Computer uses reasoning methods to data
Structured
No human interpretation needed
SYSTEMS
Decision Support System (DSS) characteristics
Computer combines models and data to resolve unstructured problems.
Gives Interactive Support
Human interpretation needed
Ad Hoc computer report characteristics
User initiated
on demand
IC - APPLICATION CONTROL
When are Exception reports generated?
When Edit Tests- Check Digits- or Self-Checking Digits identify a problem
What is End-User Computing?
The User develops and executes their own application.
E-COMMERCE
Risks
Security
Availability
Processing Integrity
Online Privacy
Confidentiality
Compromised data or theft.
Paper trail for auditors.
E-COMMERCE
Benefit
Easier business transactions
E-COMMERCE
EDI benefits
Uses globally-accepted standards
Quick
Accurate
Efficient
What is a File Server?
Stores shared programs and documents.
INTERNET
VAN (Value-Added Network) characteristics
Costly
Privately-owned Network
3rd Party Between 2 Companies Routes EDI Trx
Accepts wide range of Protocols
LAN (Local Area Network)
purpose
It connects computers in close proximity.
INTERNET
WAN purpose
It connects computers that are far apart.
INTERNET
What is the purpose of a Firewall?
Prevents unauthorized access to a network.
INTERNET
What are the characteristics of a virus?
Takes over a computer
Needs a host program to run
INTERNET
What are the characteristics of a computer worm?
Takes over multiple computers
Doesn’t need a host program to run
What is RAM?
Internal memory in the computer used during immediate processing.
What is a CPU?
Processes commands within a computer.
Input devices?
Scanner
Magnetic Ink Reader
Magnetic Tape Reader
EDI
Point of Sale Scanner
SOFTWARE
What is Job Control Language?
It schedules and allocates system resources.
What is the purpose of Automated Equipment Controls?
They prevent and detect hardware errors.
Magnetic Disks characteristics?
Random Access - Finds data in random spots
Faster data retrieval
Uses Boundary Protection for data
IC
What are Parity Checks?
A control that detects internal data errors.
A bit is added to each character- it checks to see if a bit was lost.
IC
What is an Echo Check?
Transmitted data is returned to the sender for verification
(it echoes back to the sender)
IC
What is a Change Control?
It authorizes program changes and approves program test results.
Code comparison program can compare controlled copy of s/w with in-use s/w
What is a Gateway?
Connects one network to another
Note: the Internet is connected by Gateways
