digraph {
    0 [label="\"Ethernet\""]
    1 [label="\"ARP\""]
    2 [label="\"IPv4\""]
    3 [label="\"IPv6\""]
    4 [label="\"ICMP\""]
    5 [label="\"ICMPv6\""]
    6 [label="\"TCP\""]
    7 [label="\"UDP\""]
    8 [label="\"TLS\""]
    9 [label="\"HTTP\""]
    10 [label="\"NTP\""]
    0 -> 1
    0 -> 2
    0 -> 3
    2 -> 2
    2 -> 3
    3 -> 3
    2 -> 4
    3 -> 5
    2 -> 6
    3 -> 6
    2 -> 7
    3 -> 7
    6 -> 8
    6 -> 9
    8 -> 9
    7 -> 10
}