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Types of hardware
- 1) Central Processing Unit (CPU, Mainframe)- Primary Hardware
- 2) Peripheral Equipment-Not Part of the CPU but can be under the control of it. ie. Input and Storage
- 3) Input/output Device- Transfers data in and out CPU
- 4) Secondary Storage- external device that stores data
What makes up the Central processing unit?
1) Primary Storage (Main Memory)-Protion of the CPU that holds the program, Data, and results during the process.
- 2) Control Unit-Controls and directs the operation of the computer.
- 3) Arithmetic/Logic-help perform arithmetic calculations and logical operations.
4) Bus-connects the CPU to primary memory or to peripheral devices, transmits a byte or more in one actions.
Name some examples of Input/Output Devices.
- Bar Code reader
- Magnetic Ink Character Recognition (MICR)
- Magnetic TApe Reader
- Monitor, Screen
- Optical Character Recognition (OCR) Scanner
Types of Secondary storage
- Disk, Diskette
- Magnetic Tape
- Offline storage
- Online storage
- Redundant array of independend disk (RAID)
- Randomly Accessible (Direct access)
- Sequentially accessible
Functions of a software
- Program Language-compiler that translates from high-level language into machine languageg.
- Graphical User Interface (GUI)-us of icon, scrollbar, and other pictoral means
- Patch-addition of a new part to a program.
- operating system-manages various application and computer functions.
- Application program-performs the processing of a specific application.
- Utility program-Standard program for performing routine function like sorting and merging.
- Library Program-used by other programs and "called up" when needed.
Types of program languages
- Machine Language
- Assembly Languages
- Procedural Language
- Fourth-Generation Language (4GL)
- Object-Oriented Programming (OOP)
Type of Operating Systems
1) Job control language (JCL)-command language that launches applications, specifying priorities, programs sizes, running sequence, databases used and files used.
2) Muiltiprocessing-allows more than one program to run at the same time with the use of additional CPU.
3) Virtual Storage- divides program into segment (pages) and to be used in parts and needed. Whatever is not being used is stored.
4) Multiprogramming-O/S delegates the process to a piece of peripheral equipment and CPU begins executing other programs.
Types of application programs
- 1. Pass (run)
- 2. Heuristic
- 3.Collaborative Computing application
- 4.Management information system (MIS)
- 5.Enterprise resource planning (ERP) Software
- 6.Database managment system (DBMS)
- 7. Relational Database Model
Types of Networks
- Local area network (LAN)-Share files among member in a small area.(office building)
- Value-added network (VAN)-Private network that routes EDI Transactions between trading partner.
- Wide area network (WAN)-Share files across a large network (company-wide).
- Virtual Private Network (VPN)
Types of network Hardware and software
- 1. concentrator
- 3.Proxy Server
- 7.Web Browser
- 8.Web Crawler
Types of Topology networks
Forms of data transmission
- Parallel Transmission
- Serial Transmission
- Circuit switching
- Packet Switching
Types of Client-Server Architecture
- File server
- Stabase servier
- Three-tier (n-tier) Architecture
Types of network languages
Phases of the Development & Implementation
- 1. System Analysis
- 2. System Design
- 3. Program Specifications & Implementation Planning
- 4. Implementation
- 5. Monitoring
Process for testing the program and implementing the system
- Hardware installation
- coding programs
- Training users
- system testing
- conversion testing
- volume Testing
ways to process transactions
- Batch Processing
- Online Processing
- Real-time Processing
- Intergrated System
Types of outside processing
- Block Time
- Service Bureau
Roles within the IT Department
- System Analyst
- Control Group
- Website Team
Functionin the IT department that should be segragated
- Control Group: responsible for internal controls in IT department.
- Operators: Run the equipment
- Programmers: Write, test, and debug the program.
- System analyst: Designs the system and prepare the flowchart.
- Librarian: Keeps track of the program and file use. maintain storage of all data and backups
What makes up the IT system
- 1. Hardware
- 2. Software
- 3. Documentation
- 4. Personnel
- 5. data
what are some benefits of the IT Department
What are some risk of the IT department
Control Objectives for Information Technology (COBIT)
- Primary Objective:
- 1. Helping to ensure that information systems support business goals.
- 2. Optimizing IT Investment
- 3. Appropriately managing IT-related risk and opportunities.
Meant to help bridge the gap between business risk, Management needs, and Technical issues.
List some common Transaction Processing Systems
- Inventory Control
- General Ledger
- Electronic Document Submission
- Point of Sale system
- Self-service Application
how to provide security in the IT department
- Hacker Tools
- Digital Signature
- symmetric Encryption
- Asymmetric Encryption
- Control Types
How to plan for a disaster recovery
What is the purpose of documentation
- 1. understanding of the system's objective, concept, and output.
- 2. a source of information for systems analysts and programmers when involved in program maintenance and revision.
- 3.information that is needed for supervisory review
- 4. a basis for training new personnel
- 5.means of communicating common information
- 6. source of information about accounting controls
- 7. source of information that will aid in providing continuity in the event experienced personnel leave.
Online, Real time (OLRT) Sytem