oracle 的2种访问方式

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　　[oracle@oral admin]$ lsnrctl start
　　LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 22-NOV-2011 03:02:52
　　Copyright (c) 1991, 2005, Oracle.  All rights reserved.
　　Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...
　　TNSLSNR for Linux: Version 10.2.0.1.0 - Production
　　System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
　　Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
　　Trace information written to /u01/app/oracle/product/10.2.0/db_1/network/trace/listener.trc
　　Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.205)(PORT=1521)))
　　Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
　　Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.205)(PORT=1521)))
　　STATUS of the LISTENER
　　------------------------
　　Alias                     LISTENER
　　Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
　　Start Date                22-NOV-2011 03:02:52
　　Uptime                    0 days 0 hr. 0 min. 0 sec
　　Trace Level               user
　　Security                  ON: Local OS Authentication
　　SNMP                      OFF
　　Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
　　Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
　　Listener Trace File       /u01/app/oracle/product/10.2.0/db_1/network/trace/listener.trc
　　Listening Endpoints Summary...
　　(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.205)(PORT=1521)))
　　(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
　　Services Summary...
　　Service "PLSExtProc" has 1 instance(s).
　　Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
　　Service "guo" has 1 instance(s).
　　Instance "guo", status UNKNOWN, has 1 handler(s) for this service...
　　The command completed successfully