Database Systems and SQL
Database Systems
A database system consists of:
- Database: A collection of interrelated data. A database includes:
- Data Dictionary: Contains a description of the database structure (metadata).
- Data: The actual information stored in the database.
- Database Management System (DBMS): A set of programs that allows you to define, create, manipulate, and control access to the database.
- Users: Administrators, designers, end-users, etc.
Advantages of Using a DBMS
- Reduces and controls data redundancy.
- Avoids inconsistencies
Multimedia Fundamentals: Concepts, Applications, and Information Architecture
Multimedia
- Blending or use of two or more media concurrently.
- Using different means and technologies to present information.
- The term appeared in the 60s and 70s, when describing the new media to support the learning process in the classroom.
- It integrates text, graphics, sound, animation, and video to convey information.
- A key element: interaction.
Features:
- Integration of text, graphics, images (still or moving), and sound.
- Scanning: converts data into electronic impulses, simple codes.
- Interactive: the
Mastering Outlook Express: Interface and Features
Outlook Express Basics
1. Outlook Express Basics Once you have configured a mail account, you can run Outlook Express, either from the shortcut icon on the desktop or from the Start button → Programs → Outlook Express. When you run Outlook Express, the window will appear as follows:
The fundamental parts of this window have been marked with red squares and numbered from 1 to 6. The following describes each of these six areas:
Title Bar: This is the title of the application or function that is
Frame Relay, PPP, and WAN Essentials
Frame Relay Essentials
Configuration
Where is Frame Relay set? From the line interface of Cisco IOS Command Line Interface (CLI).
Tasks to configure Frame Relay-enabled encapsulation:
- Configure Frame Relay encapsulation on an interface.
- Configure dynamic or static assignment of addresses.
Optional tasks for Frame Relay configuration:
- Set LMI (Local Management Interface).
What command serves Frame Relay SVC encapsulation? encapsulation frame-relay
What command serves bandwidth configuration? bandwidth (Establishes
Service-Oriented Architecture (SOA): A Deep Dive
Introduction to Service-Oriented Architecture (SOA)
Originally authored by Raghu Kodali (Original Article)
Translated by Mario Alberto La Menza
Summary
Service-Oriented Architecture (SOA) represents the cutting edge of software engineering and is a frequent topic of discussion among development teams. This document introduces SOA, discusses the business needs it addresses, defines what a service-oriented architecture entails, and clarifies common myths and realities surrounding SOA.
What is SOA?
A service-
Read MoreObject-Oriented Programming and PC Architecture
Object-Oriented Programming
Purpose: To manage complex data structures and programs within an organized framework. A data object is not simple; it contains several well-structured components.
Class
Classes are object declarations, also definable as object abstractions. A class is a static construct describing common behavior and attributes. It’s formalized through a data structure, including data and functions called methods. Methods define behavior. Every class has two key methods:
- Constructor: Called