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Step 1 of 1 6.08DP Hierarchical schematic structure is preferred, because it is used when the network ports are identical. In Hierarchical schematic structure, top level schematic (in which only blocks) connected to the low level pages (in which gate level descriptions). In this particular low level hierarchy is used more than once that is one network port in twelve identical ports is designed using single gate level description and reused twelve times by the higher level hierarchy.