Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection

📢Dear Techies,


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In This video will see how to resolve the error of IO Error: The Network Adapter could not establish the connection in SQL Developers.


Run below Commands:
step 1. Run CMD as Administrator
step 2. use this commands
lsnrctl start
lsnrctl status
step 3. In RUN Execute this services.msc
step 4. Start the following services
start or Refresh 'OracleServiesORCL'
start or Refresh 'OracleOraDB21Home1TNSListener'

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