Checking Network Adapter Configurations

To get all network adapters and their DNS information using PowerShell, you can use the Get-NetAdapter cmdlet from the NetAdapter module to retrieve a list of network adapters, and the Get-DnsClientServerAddress cmdlet to retrieve the DNS server addresses for each adapter.

# Import the NetAdapter module

Import-Module NetAdapter

# Get a list of all network adapters

$Adapters = Get-NetAdapter

# Loop through the adapters

foreach ($Adapter in $Adapters) {

  # Get the DNS server addresses for the adapter

  $DnsServers = Get-DnsClientServerAddress -InterfaceAlias $Adapter.Name

  # Create a new object with the adapter and DNS server information

  $Object = [pscustomobject]@{

    Adapter = $Adapter.Name

    DnsServers = $DnsServers.ServerAddresses -join ','

  }

  # Write the object to the console

  $Object | Format-Table -AutoSize

}

But this doesn’t let you work with the data so we can change the $object and return it into a Variable like this

# Import the NetAdapter module

Import-Module NetAdapter

# Get a list of all network adapters

$Adapters = Get-NetAdapter

# Loop through the adapters

$AdapterInformation = foreach ($Adapter in $Adapters) {

  # Get the DNS server addresses for the adapter

  $DnsServers = Get-DnsClientServerAddress -InterfaceAlias $Adapter.Name

  # Create a new object with the adapter and DNS server information

  $Object = [pscustomobject]@{

    Adapter = $Adapter.Name

    DnsServers = $DnsServers.ServerAddresses -join ','

  }

  # Write the object to the console

  $Object 

}

When returning something in PowerShell, it returns anything that is written to the pipeline.

Keep in mind that a function can return multiple values or objects by writing them to the pipeline or by using the return keyword. You can use the Out-Default cmdlet to write the output to the console or the Out-File cmdlet to write the output to a file. You can also use the > operator to redirect the output to a variable or to a file.