Test-Connection

Here is how you check the basic network connectivity:

1. Use Ping to test connectivity from CL1 to DC1:

      Ping DC1

2. Use Test-NetConnnection to test connection to DC1:

      Test-Connection -ComputerName DC1

3. Test with a simple true/false return:

      Test-Connection -ComputerName DC1 -Quiet

4. Test multiple systems at once:

      Test-Connection -ComputerName 'DC1','DC2','SRV1' -Count 1

5. Test connectivity to DC1 for SMB traffic:

      Test-NetConnection -ComputerName DC1 -CommonTCPPort SMB

6. Get a detailed connectivity check, using DC1 with HTTP:

      Test-NetConnection -ComputerName DC1 -CommonTCPPort HTTP `
                         -InformationLevel Detailed

7. Check connectivity to a port (LDAP on DC1):

      Test-NetConnection -ComputerName DC1 -Port 445

8. Check connectivity to a system that is up and running but for a port that does not exist or is not open:

      Test-NetConnection -ComputerName DC1 -PORT 9999

9. Finally, test for a system that does not exist:

      Test-NetConnection -ComputerName DC99 -PORT 9999