B3 Issues relating to transmission of data
How the features and processes of data transmission affect the use and performance of IT systems.
• Protocols used to govern and control data transmission for common tasks:
o email
o voice and video calls over the internet
o web pages
o secure payment systems.
• Security issues and considerations when transmitting data over different connection types
and networks.
• Factors affecting bandwidth and latency.
• The implications of bandwidth and latency on the use and performance of an IT system.
• Types of compression:
o lossy
o lossless.
• The applications and implications of data compression.
• The use and implications of codecs when using and transmitting audio and video in
digital format.
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