Normalisation (Database)

March 20, 2017 antony 0

Data normalisation organises data in a database (across multiple tables/entities/relations) to ensure there is no data redundancy and to avoid anomalies (insert, deletion, update).  There […]

Communication Protocols

January 3, 2017 antony 0

Protocols are agreed forms of communication.  Computer networks require protocols to transfer different types of data reliably and efficiently – and sometimes securely – most protocols […]

Network Topology

January 3, 2017 antony 0

Topology is the arrangement of network devices and their connection. The star topology is most commonly used as it is the most fault tolerant.  If […]

Transmission media

January 3, 2017 antony 0

Transmission media (or medium) refers to any method of network connection, whether it is wired or wireless.  They all transfer packets of data using different […]

Structure Charts

July 16, 2016 antony 0

Structure charts show the functions/modules within software and the parameters passed between them.  Note: the only symbols you need to use are process and data […]

Data Integrity (database)

March 27, 2016 antony 0

Data integrity is about ensuring all data is consistent and accurate throughout a database. Referential integrity ensures all foreign keys have a primary key in another […]