PrefixOrigin PrefixOrigin PrefixOrigin PrefixOrigin Enum

Definizione

Specifica come è stata determinata la posizione del prefisso dell'indirizzo di rete IP.Specifies how an IP address network prefix was located.

public enum class PrefixOrigin
public enum PrefixOrigin
type PrefixOrigin = 
Public Enum PrefixOrigin
Ereditarietà

Campi

Dhcp Dhcp Dhcp Dhcp 3

Il prefisso è stato fornito da un server DHCP (Dynamic Host Configuration Protocol).The prefix was supplied by a Dynamic Host Configuration Protocol (DHCP) server.

Manual Manual Manual Manual 1

Il prefisso è stato configurato manualmente.The prefix was manually configured.

Other Other Other Other 0

Il prefisso è stato individuato tramite una sorgente non specificata.The prefix was located using an unspecified source.

RouterAdvertisement RouterAdvertisement RouterAdvertisement RouterAdvertisement 4

Il prefisso è stato fornito da un annuncio router.The prefix was supplied by a router advertisement.

WellKnown WellKnown WellKnown WellKnown 2

Il prefisso è un prefisso noto.The prefix is a well-known prefix. I prefissi noti sono specificati nei documenti ST (Standard Track) delle RFC (Request for Comments) e vengono assegnati dalla IANA (Internet Assigned Numbers Authority) o da un registro indirizzi.Well-known prefixes are specified in standard-track Request for Comments (RFC) documents and assigned by the Internet Assigned Numbers Authority (Iana) or an address registry. Tali prefissi vengono utilizzati per scopi speciali.Such prefixes are reserved for special purposes.

Esempi

Esempio di codice seguente visualizza le informazioni di prefisso e suffisso per gli indirizzi unicast.The following code example displays prefix and suffix information for unicast addresses.

void DisplayUnicastAddresses()
{
   Console::WriteLine( "Unicast Addresses" );
   array<NetworkInterface^>^adapters = NetworkInterface::GetAllNetworkInterfaces();
   System::Collections::IEnumerator^ myEnum17 = adapters->GetEnumerator();
   while ( myEnum17->MoveNext() )
   {
      NetworkInterface ^ adapter = safe_cast<NetworkInterface ^>(myEnum17->Current);
      IPInterfaceProperties ^ adapterProperties = adapter->GetIPProperties();
      UnicastIPAddressInformationCollection ^ uniCast = adapterProperties->UnicastAddresses;
      if ( uniCast->Count > 0 )
      {
         Console::WriteLine( adapter->Description );
         String^ lifeTimeFormat = "dddd, MMMM dd, yyyy  hh:mm:ss tt";
         System::Collections::IEnumerator^ myEnum18 = uniCast->GetEnumerator();
         while ( myEnum18->MoveNext() )
         {
            UnicastIPAddressInformation ^ uni = safe_cast<UnicastIPAddressInformation ^>(myEnum18->Current);
            DateTime when;
            Console::WriteLine( "  Unicast Address ......................... : {0}", 
               uni->Address );
            Console::WriteLine( "     Prefix Origin ........................ : {0}", 
               uni->PrefixOrigin );
            Console::WriteLine( "     Suffix Origin ........................ : {0}", 
               uni->SuffixOrigin );
            Console::WriteLine( "     Duplicate Address Detection .......... : {0}", 
               uni->DuplicateAddressDetectionState );
            
            // Format the lifetimes as Sunday, February 16, 2003 11:33:44 PM
            // if en-us is the current culture.
            // Calculate the date and time at the end of the lifetimes.    
            when = DateTime::UtcNow + TimeSpan::FromSeconds( (double)uni->AddressValidLifetime );
            when = when.ToLocalTime();
            Console::WriteLine( "     Valid Life Time ...................... : {0}", 
               when.ToString( lifeTimeFormat, System::Globalization::CultureInfo::CurrentCulture ) );
            when = DateTime::UtcNow + TimeSpan::FromSeconds( (double)uni->AddressPreferredLifetime );
            when = when.ToLocalTime();
            Console::WriteLine( "     Preferred life time .................. : {0}", 
               when.ToString( lifeTimeFormat, System::Globalization::CultureInfo::CurrentCulture ) );
            when = DateTime::UtcNow + TimeSpan::FromSeconds( (double)uni->DhcpLeaseLifetime );
            when = when.ToLocalTime();
            Console::WriteLine( "     DHCP Leased Life Time ................ : {0}", 
               when.ToString( lifeTimeFormat, System::Globalization::CultureInfo::CurrentCulture ) );
         }
         Console::WriteLine();
      }
   }
}
public static void DisplayUnicastAddresses()
{
    Console.WriteLine("Unicast Addresses");
    NetworkInterface[] adapters  = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface adapter in adapters)
    {
        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        UnicastIPAddressInformationCollection uniCast = adapterProperties.UnicastAddresses;
        if (uniCast.Count >0)
        {
            Console.WriteLine(adapter.Description);
            string lifeTimeFormat = "dddd, MMMM dd, yyyy  hh:mm:ss tt";
            foreach (UnicastIPAddressInformation uni in uniCast)
            {
                DateTime when;
                
                Console.WriteLine("  Unicast Address ......................... : {0}", uni.Address);
                Console.WriteLine("     Prefix Origin ........................ : {0}", uni.PrefixOrigin);
                Console.WriteLine("     Suffix Origin ........................ : {0}", uni.SuffixOrigin);
                Console.WriteLine("     Duplicate Address Detection .......... : {0}", 
                    uni.DuplicateAddressDetectionState);
                    
                // Format the lifetimes as Sunday, February 16, 2003 11:33:44 PM
                // if en-us is the current culture.
                
                // Calculate the date and time at the end of the lifetimes.    
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressValidLifetime);
                when = when.ToLocalTime();    
                Console.WriteLine("     Valid Life Time ...................... : {0}", 
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressPreferredLifetime);   
                when = when.ToLocalTime();
                Console.WriteLine("     Preferred life time .................. : {0}", 
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                ); 
                
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.DhcpLeaseLifetime);
                when = when.ToLocalTime(); 
                Console.WriteLine("     DHCP Leased Life Time ................ : {0}", 
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );
            }
            Console.WriteLine();
        }
    }
}
Public Shared Sub DisplayUnicastAddresses() 

    Console.WriteLine("Unicast Addresses")
    Dim adapters As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
    Dim adapter As NetworkInterface
    For Each adapter In  adapters
        Dim adapterProperties As IPInterfaceProperties = adapter.GetIPProperties()
        Dim uniCast As UnicastIPAddressInformationCollection = adapterProperties.UnicastAddresses
        If uniCast.Count > 0 Then
            Console.WriteLine(adapter.Description)
            Dim lifeTimeFormat As String = "dddd, MMMM dd, yyyy  hh:mm:ss tt"
            Dim uni As UnicastIPAddressInformation
            For Each uni In  uniCast
                Dim [when] As DateTime
                
                Console.WriteLine("  Unicast Address ......................... : {0}", uni.Address)
                Console.WriteLine("     Prefix Origin ........................ : {0}", uni.PrefixOrigin)
                Console.WriteLine("     Suffix Origin ........................ : {0}", uni.SuffixOrigin)
                Console.WriteLine("     Duplicate Address Detection .......... : {0}", uni.DuplicateAddressDetectionState)
                
                ' Format the lifetimes as Sunday, February 16, 2003 11:33:44 PM
                ' if en-us is the current culture.
                ' Calculate the date and time at the end of the lifetimes.    
                [when] = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressValidLifetime)
                [when] = [when].ToLocalTime()
                Console.WriteLine("     Valid Life Time ...................... : {0}", [when].ToString(lifeTimeFormat, System.Globalization.CultureInfo.CurrentCulture))
                [when] = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressPreferredLifetime)
                [when] = [when].ToLocalTime()
                Console.WriteLine("     Preferred life time .................. : {0}", [when].ToString(lifeTimeFormat, System.Globalization.CultureInfo.CurrentCulture))
                
                [when] = DateTime.UtcNow + TimeSpan.FromSeconds(uni.DhcpLeaseLifetime)
                [when] = [when].ToLocalTime()
                Console.WriteLine("     DHCP Leased Life Time ................ : {0}", [when].ToString(lifeTimeFormat, System.Globalization.CultureInfo.CurrentCulture))
            Next uni
            Console.WriteLine()
        End If
    Next adapter

End Sub 'DisplayUnicastAddresses

Commenti

Gli indirizzi IP sono suddivisi in due parti: il prefisso e suffisso.IP addresses are divided into two parts: the prefix and the suffix. Il prefisso dell'indirizzo identifica la parte di rete di un indirizzo IP e il suffisso identifica la parte host.The address prefix identifies the network portion of an IP address, and the address suffix identifies the host portion. I prefissi sono assegnati dalle autorità globale e suffissi vengono assegnati dagli amministratori di sistema locale.Prefixes are assigned by global authorities, and suffixes are assigned by local system administrators.

Questa enumerazione viene utilizzata per la UnicastIPAddressInformation e MulticastIPAddressInformation classi.This enumeration is used by the UnicastIPAddressInformation and MulticastIPAddressInformation classes. Le istanze di questa classe vengono restituite quando si recuperano le informazioni sull'indirizzo per un NetworkInterface oggetto.Instances of this class are returned when you retrieve the address information for a NetworkInterface object.

Si applica a