graph G {
    node [ shape=box, fontcolor="#ffffff", color="#40a9e3", style="filled"  ]
    label="IPv4 as a service\n(simplified)\nby ungleich.ch"

    concentrate=true

    client [ label="Notebook, Desktop,\nServer, IoT device"  color="#ee1100" ]

    ipv4internet [ label="IPv4 Internet" shape=oval ]
    ipv6internet [ label="IPv6 Internet" shape=oval ]

    ipv6internet--client [ label="Access via VPN"  ]

    ipv4internet--client [ label="Access via NAT64 translator" ]
}