Difference between Coaxial cable and Optical fiber
Coaxial cable Optical Fiber 1. Data rate in Mbps relatively low in comparison of Optical Fiber . 2. High attenuation 3. Transmission through electro magnetic…
Difference between Coaxial cable and Optical fiber
Difference between Analog signal and Digital signal
Analog signal Digital signal 1. Analog signal is a continuous electromagnetic waves that may be propagated in a media depending on frequency. 2. For example…
Difference between LAN , MAN , WAN
LAN MAN WAN 1. LAN stands for Local Area Network. 2. Used Guided Media 3. A communication network linking a number of stations in same…
Network Topologies
The common topologies are Bus, Tree, Ring, and Star. 1. Bus topology : Bus are characterized by the use of a multi-point medium. In Bus,…
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…
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…
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…
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
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…