ORA-12545：连接失败，因为目标主机或对象不存在

Question

我正在使用oracle 10g，一切正常，但是一旦我更改了我的互联网连接，并尝试连接sql * plus它就会给我以下错误：

ERROR:
ORA-12545: Connect failed because target host or object does not exist

我的 tnsnames.ora 包含：

# tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = BOUHDID.Home)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

LISTENER.ORA：

# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = BOUHDID.Home)(PORT = 1521))
    )
  )

sqlnet.ora中：

# sqlnet.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# 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, EZCONNECT)

编辑：

我将文件中主机的名称更改为Localhost，并执行了ping操作：

C:\Windows\System32>ping Localhost
Envoi d'une requête 'ping' sur BOUHDID [127.0.0.1] avec 32 octets de données :
Réponse de 127.0.0.1 : octets=32 temps<1ms TTL=128
Réponse de 127.0.0.1 : octets=32 temps<1ms TTL=128
Réponse de 127.0.0.1 : octets=32 temps<1ms TTL=128
Réponse de 127.0.0.1 : octets=32 temps<1ms TTL=128

Statistiques Ping pour 127.0.0.1:
    Paquets : envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
    Minimum = 0ms, Maximum = 0ms, Moyenne = 0ms

并做了一个tnsping：

C:\Windows\System32>tnsping orcl
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 14-JUIL.
-2017 09:27:03
Copyright (c) 1997, 2005, Oracle.  All rights reserved.
Fichiers de paramÞtres utilisÚs :
C:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora

Adaptateur TNSNAMES utilisÚ pour la rÚsolution de l'alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = Localhos
t)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))
OK (20 msec)

tsnping有效，但是当我尝试连接sqlplus时，它会给我以下错误：

ORA-12514: TNS:listener does not currently know of service requested in connect descriptor