Difference between net and hNets in db commands

[ravi_meher]

Hi,

A) What is the difference between the below two statements

1. set a1 [dbGet top.nets.name]
2. set a2 [dbGet top.hInst.hnets.name]
B) Both 3 and 4 statements priniting the same name (RVXG1), which is the top module. Then how is the second statement helpful

3.dbGet top.name

4.dbGet top.hInst.cell.name