Data storage and transmission
This topic covers examines how data is stored in large quantities, and how it is compressed for storage and transmission. It considers the physical media used to store local and distributed databases; how these databases can be interacted with, and how data is reliably transferred across networks using encoding and error checking.
Links and Resources
This resource consists of two documents. One is a theory sheet and the other a structured workbook for students to complete. This would form a useful independent learning resource so could be issued as a homework task.
Two topics that support the database topic are covered in this presentation. The emphasis at A level is investigating the technical architecture rather than application. These are two important topics often tricky to find resources for.
It is often very helpful to reiterate vocabulary and definitions associated with database technology. This resource can be used as a starter or a plenary activity to reinforce key terminology.
Databases are a fundamental part of modern organisations. This resource consists of an activity sheet, answer sheet and a highly usable utility for using SQLite with Python. The activities enable students to produce implement what they have learned from the theoretical content.
This resource from the Scottish Qualification Authority covers key aspects of data transmission including the concepts of serial and parallel communication, error correction, simplex, half duplex and duplex transmission.