Part 8: FDM & TDM in Data Communication

Part 8: FDM & TDM in Data Communication

  Signal multiplexing is a process in which multiple signals can be transmitted together over the same communication medium simultaneously. Time division multiplexing Time division multiplexing is a technique of separating the signals in time domain. In TDM the...

Part 5: Modulation in Data Communications

Part 5: Modulation in Data Communications

Analog to Analog Modulation Analog-to-analog conversion, or modulation, is the representation of analog information by an analog signal. It is a process by virtue of which a characteristic of carrier wave is varied according to the instantaneous amplitude of the...

Part 2: Data Communication – Network Models

Part 2: Data Communication – Network Models

Networking Network A network is a set of devices (often referred to as nodes) connected by links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes  on the network. Network criteria Performance...

Part 1: Introduction to Data Communications

Part 1: Introduction to Data Communications

Data Communications Data Communications :  Data Communication is the exchange of data (in the form of 0’s and 1’s) between two devices via some form of transmission  medium (such  a cable). In other way can define, Data Communication is a process of exchanging data or...

Chapter 4 Relational Algebra

Chapter 4 Relational Algebra

Relational Algebra The part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formula and equations. Ex: (x + y) · z = (x · z) + (y · z). The main application of relational algebra is providing a theoretical...

Chapter 3 Components of the Database System Environment

Chapter 3 Components of the Database System Environment

Components of the Database System Environment There are five major components in the database system environment and their interrelationships are. Hardware Software Data Users Procedures Hardware:  The hardware is the actual computer system used for keeping and...

Database basic overview

Database basic overview

What is DBMS? A Database Management System (DBMS) is a collection of interrelated data and a set of programs to access those data. Database management systems (DBMS) are computer software applications that interact with the user, other applications, and the database...

Laravel – Scopes (3 Easy Steps)

Laravel – Scopes (3 Easy Steps)

Scoping is one of the superpowers that eloquent grants to developers when querying a model. Scopes allow developers to add constraints to queries for a given model. In simple terms laravel scope is just a query, a query to make the code shorter and faster. We can...