Each data access circuit is made up of a grid of empty slots. Hacking nodes must be placed into the slots to complete the circuit.
There are 34 Stores, and 34 different data access circuit layouts. The layouts are numbered, from 0 to 33, and the number is displayed in the top left corner of the screen while hacking.
The order of data access circuit layouts is sequential. They are not random, and are not tied to any particular Store, so the 7th Store hacked is also the same circuit, no matter which Store is being hacked.
The first 10 levels use a 4x4 grid, the next 12 use a 5x5 grid, the final 12 use a 6x6 grid.
There are 6 types of Hacking Nodes: the number and availability of each vary between levels.
Some locations in the circuit are obstructed and cannot be used: