listener.ora
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = Parus.ekmed.local)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = E:\parus
 SID_LIST_LISTENER=
   (SID_LIST=
	(SID_DESC=
          (GLOBAL_DBNAME=ORCL)
          (SID_NAME=ORCL)			
          (ORACLE_HOME=E:\parus\product\11.2.0\dbhome_1)
    )
  )
slqnet.ora
# This file is actually generated by netca. But if customers choose to 
# install "Software Only", this file wont exist and without the native 
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES)
tnsnames.ora
ORCL_TCP = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL = TCP)(HOST = Parus.ekmed.local)(PORT = 1521)) 
    ) 
    (CONNECT_DATA = 
      (SERVICE_NAME = ORCL) 
    ) 
  )
ORCL_LOC = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) 
    ) 
    (CONNECT_DATA = 
      (SERVICE_NAME = ORCL) 
    ) 
  ) 
ORCL_IPC = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL=IPC)(KEY=PNPKEY)) 
    ) 
    (CONNECT_DATA = 
      (SERVICE_NAME = ORCL) 
    ) 
  )

tnsping ORCL_TCP
Microsoft Windows [Version 6.3.9600]
(c) Корпорация Майкрософт (Microsoft Corporation), 2013. Все права защищены.

C:\Users\novinkinam>tnsping ORCL_TCP

TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 10-FEB-2
019 14:35:28

Copyright (c) 1997, 2010, Oracle.  All rights reserved.

Used parameter files:
E:\parus\product\11.2.0\dbhome_1\NETWORK\ADMIN\sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)
(HOST = Parus.ekmed.local)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = ORCL))
)
OK (40 msec)

Microsoft Windows [Version 6.3.9600]
(c) Корпорация Майкрософт (Microsoft Corporation), 2013. Все права защищены.

C:\Users\novinkinam>sqlplus sys/ThisIsSuperVisor@ss!@ORCL as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Sun Feb 10 14:40:37 2019

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified


Enter user-name: SYS
Enter password:
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified


Enter user-name:

D:>sqlplus -L aa/aa@aa@orcl
...
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified

SP2-0751: Unable to connect to Oracle.  Exiting SQL*Plus

D:>sqlplus -L aa/"aa@aa"@orcl
...
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified

SP2-0751: Unable to connect to Oracle.  Exiting SQL*Plus

D:>sqlplus -L aa/\"aa@aa\"@orcl
...
Connected to:
...
SQL>