Difference between returning ic.lookup(jndiName) and PortableRemoteObject.narrow(objref, classType)

[vandiesel]

Hi,

I'd like to know the diff between

return PortableRemoteObject.narrow(objref, classType);

and

return ic.lookup(JNDIName);

Can I use  " return PortableRemoteObject.narrow(objref, classType)" to lookup for the EJB beans in Jboss AS 7.1.1(;Using EJB 2.1.)