A worksheet to demonstrate RLE data compression. Enables to show how the RLE, type of lossless, data compression works and evaluate what features of data influence the compression ratio. A step into lossy compression.

All you need to remember to do your J276 or J277 programming Non-Exam Assessment part for Computer Science GCSE.

Recognize basic network topologies - answers on a separate sheet Students have to know characteristics of network topologies, be able to find corresponding picture, know the names of network topologies. Here is how it works: A student gets a text description of network topology Has to find this topology on a picture - so they can have a look at them all and have to understand how descriptions correspond to pictures Each picture has a number which points to where the answer for the hint should be put Picture for hybrid topology is missing, but it can be worked out where ‘hybrid’ fits as it is the only one left after filling all other solutions