Default port of Oracle 9i Database --- Oracle database installation

Question

Hi,
I am new to oracle..searched across internet to know this particular detail of Oracle 9i database installation.
My query being..Can Oracle database be installed in a way to use port's other than 1521. When do we go for making use of a port other than 1521. What are the risk's and benifit's.
How to make use of a port other than 1521 while making use of OUI(oracle universal installer) to install a 9i database on windows OS.
Can someone provide an answer to my queries/ some link where I can find the answer.
Thanks,
R S

Answer 1

you have to change the port no in listener.ora file which exists on Oracle_home/network/admin/listener.ora like
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = Griat-xp.bebo.tech.com)(PORT = 1521))
  )from this to
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = Griat-xp.bebo.tech.com)(PORT = 1522))
  )afterwords you have to reload the listener by using lsnrctl on command prompt
in this way you can change the default port of Oracle
Regards
Singh