It is of two dimensional network. In this every processing elements are arranged in a two dimensional grid. The processor are in rows i and column j are denoted by PEi.
The processors on the corner can communicate to two nearby neighbors i.e. PE00 can communicate with PE10and PE01. The processor on the edge can communicate to three adjacent processing elements i.e. PE01 can communicate with PE00, PE02 and PE11 and internally placed processors can communicate with four adjacent processors i.e. PE11 can communicate with PE01, PE10, PE12, and PE21