Oracle web-based management(how to access)

Oracle Enterprise Manager:
C:\>emctl start dbconsole

Go to the file:
"%ORCLE_HOME%\install\portlist.ini" and see the port number of "Enterprise Manager Console HTTP Port (orcl) " after that go to URL like "http://hostname:portnumber/em".

iSQL*Plus
C:\>isqlplusctl start

Go to the file:

"%ORCLE_HOME%\install\portlist.ini" and see the port number of "iSQL*Plus HTTP port number" after that go to URL like "http://hostname:portnumber/isqlplus".