Сетевые команды

$result = Resolve-DnsName example.com -Type A
$items = @($result)
[pscustomobject]@{ Count=$items.Count; First=$items | Select-Object -First 1; IsNull=($null -eq $result) }

$result = [Net.Dns]::GetHostAddresses("localhost") | ForEach-Object IPAddressToString
$resultType = if($null -eq $result){'<null>'}else{$result.GetType().FullName}
[pscustomobject]@{ Result=$result; Type=$resultType; Count=@($result).Count }

$result = Clear-DnsClientCache
$shape = if($null -eq $result){'<null>'}elseif($result -is [array]){'array'}else{$result.GetType().Name}
[pscustomobject]@{ Shape=$shape; Values=@($result) }

$result = Test-NetConnection example.com -Port 443 -InformationLevel Detailed
$summary = [ordered]@{ IsNull=($null -eq $result); Count=@($result).Count }
if($null -ne $result){$summary.Type=$result.GetType().FullName};[pscustomobject]$summary

Test-Connection example.com -Count 1 -Quiet
Test-NetConnection example.com -Port 443

$tcp=[Net.Sockets.TcpClient]::new()
$ok=$tcp.ConnectAsync("example.com",443).Wait(3000)
$tcp.Dispose()

$r=Invoke-WebRequest https://example.com -TimeoutSec 10
$r.StatusCode

$r=Invoke-WebRequest https://example.com/missing -SkipHttpErrorCheck
$r.StatusCode

$result = Invoke-WebRequest $uri -Proxy $proxy -ProxyUseDefaultCredentials
$summary = [ordered]@{ IsNull=($null -eq $result); Count=@($result).Count }
if($null -ne $result){$summary.Type=$result.GetType().FullName};[pscustomobject]$summary

$result = Test-NetConnection example.com -TraceRoute
$shape = if($null -eq $result){'<null>'}elseif($result -is [array]){'array'}else{$result.GetType().Name}
[pscustomobject]@{ Shape=$shape; Values=@($result) }

$result = Find-NetRoute -RemoteIPAddress 8.8.8.8
$resultType = if($null -eq $result){'<null>'}else{$result.GetType().FullName}
[pscustomobject]@{ Result=$result; Type=$resultType; Count=@($result).Count }

$result = & traceroute -- example.com
$summary = [ordered]@{ IsNull=($null -eq $result); Count=@($result).Count }
if($null -ne $result){$summary.Type=$result.GetType().FullName};[pscustomobject]$summary

Resolve-DnsName $host
Test-NetConnection $host -Port 443

$result = & { $PSVersionTable; [Net.Dns]::GetHostAddresses($host) }
$shape = if($null -eq $result){'<null>'}elseif($result -is [array]){'array'}else{$result.GetType().Name}
[pscustomobject]@{ Shape=$shape; Values=@($result) }

# Сценарий для ревью: TCP иногда не проходит.
$deadline = (Get-Date).AddSeconds(15)
$samples = while((Get-Date) -lt $deadline){
  [pscustomobject]@{ At=[datetimeoffset]::UtcNow; Processes=@(Get-Process).Count; Jobs=@(Get-Job -State Running).Count }
  Start-Sleep -Milliseconds 500
}
$samples | Select-Object -Last 5