Sneak loop analysis identify the topology nodes in the network tree firstly, and for the variety of topology in use of the clue sheet, check the possible of sneak loop carefully.
There are five basic types in the Network tree topology, namely single-track, arched ground, power arch, combination arch, and H-type, in which H-loop structure is most likely to get the sneak loop. We can use the sneak loop analysis to check the security of the code.