Define the terms Modem , Protocol , Ethernet , and Broadband
Modem: Modem combined with two words Modulator and Demodulator. A device that can convert a digital bit stream into an analog signal for transmission over…
Management Information Systems
escribe network services such as ATM , Frame Relay , and ISDN
ATM: ATM stands for Asynchronous Transfer Mode. ATM is widespread application its use as part of broadband. ATM does not provide error control and flow…
Components of Database management system
The components of DBMS are the following : 1. DDL Compiler : DDL compiler processes schema definitions, specified in the DDL, and, stores description of…
Advantages of database over traditional file approach
Controlling Redundancy Restricting Unauthorized Access Providing Multiple user interfacing Providing Backup and Recovery Representing complex relationship among data Enforcing integrity constraints
Difference between a Foreign key and Primary key
Foreign Key Primary Key 1. A foreign key can refer to its own relation . 2. One or more Foreign key can be treated in…
What is entity integrity ? What is a relation ?
Entity integrity : The entity integrity constraint state that no Primary key value can be NULL, because the primary key value is used to identify…
Database management Software
To create a database it is not necessary to adopt a database management system we can create its own database system with the help of…
Schema
The DBA ( Database Administrator ) creates the database schema by a set of definitions, that is, translated by the DDL compiler, i.e. stored permanently…
Data Models
A collection of concepts that can be used to the structure of a database. By structure of a database, the data types, relationships, and constraints…
Difference between WWW and TFTP
WWW : WWW stands for World Wide Web or Web is A system that has made to access any document on the net , including…