The bottom line is that passive scanning in systems can expose a lot of information about all aspects of the system in normal communications without intruding upon operations. Active scanning has the potential to discover more information, and when combined with passive scanning, it gives a more complete picture.
Brick sizes vary depending on the country, the manufacturer and the purpose for which they are intended. In the United States, standard modern bricks are usually about 8 Ã 4 Ã 2.25 inches (203 Ã 102 Ã 57 mm). modular bricks are 7 5/8 long x 3 5/8 thick x3 5/8 deep.
Brick Dimensions The work size of a standard brick is: 76 mm high x 230 mm long x 110 mm wide.Some bricks are made with different work sizes. For example brick heights of 119 mm and 162 mm to match 1.5and 2 standard size brick heights, including mortar joint, respectively.