need refactorization Networking with powershell

4.Networking/1.check_port.ps1

@@ -0,0 +1,9 @@
+$ports = 22,80
+$ports | forEach-Object {
+  $port = $PSItem; 
+    if(Test-NetConnection udemy.com -Port $port){
+      Write-Host "Hey, $port is open !"} 
+    else { 
+      Write-Host "Hey, $port is closed ! "}
+}
+

4.Networking/Networking with Powershell.md

@@ -1 +1,108 @@
 # Networking with Powershell
+
+## Test-Connection
+
+Similar to ping
+
+```powershell
+Test-Connection udemy.com
+# Multiple Connexion
+Test-Connection -ComputerName 8.8.8.8, 8.8.4.4
+#  Add Delay between ping attempt
+Test-Connection -ComputerName 8.8.8.8, 8.8.4.4 -Delay 5
+#  Number of ping attempts
+Test-Connection -ComputerName 8.8.8.8, 8.8.4.4 -Delay 5 - Count 2
+```
+
+## Test-NetConnection
+
+similar to test net-Connections but better output
+
+```powershell
+Test-NetConnection udemy.com
+
+Test-NetConnection udemy.com -InfomationLevel "Detailed"
+
+#Populate a variable
+
+$test = Test-NetConnection udemy.com -InfomationLevel "Detailed"
+$test.PingReplyDetailed
+```
+
+### TraceRoute
+
+```powershell
+$test = Test-NetConnection udemy.com -TraceRoute
+# Limit traceroute to 3 hops
+$test = Test-NetConnection udemy.com -TraceRoute -Hops 3
+```
+
+### Portscan
+
+```powershell
+Test-NetConnection wikipedia.org -CommonTCPPort "http"
+
+Test-NetConnection wikipedia.org -Port 80
+Test-NetConnection wikipedia.org -Port 21
+
+$ports = 22,80
+
+$ports | forEach-Object {$port = $PSItem; if(Test-NetConnection udemy.com -Port $port -InformationLevel Quiet -WarningAction SilentlyContinue){Write-Host "Hey, $port is open !"} else { Write-Host "Hey, $port is closed ! "}}
+```
+
+## Get-NetAdapter
+
+To see the network adapter of the machine
+
+```powershell
+Get-NetAdapter 
+
+#nicer view
+Get-NetAdapter | Format-List
+
+$netAdapter = Get-NetAdapter
+$netAdapter.MacAddress
+```
+
+## Get-NetIPConfiguration
+
+To access ip address of the machine
+
+```powershell
+Get-NetIPConfiguration
+
+$ipinfo = Get-NetIPConfiguration
+
+$ipinfo[0].IPv4Address
+```
+
+## Resolve-DnsName
+
+```powershell
+
+Resolve-DnsName udemy.com
+
+Resolve-DnsName udemy.com | Format-List
+
+```
+
+## Get-DnsClientServerAddress 
+
+```powershell
+Get-DnsClientServerAddress -InterfaceAlias Ethernet
+$dnsserv = Get-DnsClientServerAddress -InterfaceAlias Ethernet
+$dnserv[0].ServerAddresses
+```
+
+## Clear-DnsClientCache
+
+The **Clear-DnsClientCache** cmdlet clears the local DNS resolver 
+cache on a Windows system. 
+This forces the computer to request fresh DNS information from 
+its configured DNS servers, which is useful for troubleshooting 
+name resolution issues or testing DNS changes. 
+The cmdlet requires administrative privileges and only affects the local machine.
+
+```powershell
+Clear-DnsClientCache
+```