3. How does a via allow a designer to route traces across one another without creating a short circuit between them? 4. List few reasons on why most modern PCB Solution Ground is frequently the most common connection in the circuit. Having it continuous on the bottom layer usually makes the most sense for circuit routing. Pond routing method has been classified into following types for different situations. Storage indication: This method is widely using. It is very fast and stable. It evaluates one node at a time. Dynamic storage indication: It is same as storage-indication, but re-evaluates outlets devices at each time step. Then it allows ponds to respond to varying tailwater. Simultaneous routing: It re-evaluates the outlets at each time step, like DSI. It doesn .