System.Net.Sockets.ProtocolType
Ggp = 3
Icmp = 1
IcmpV6 = 58
Idp = 22
Igmp = 2
IP = 0
IPv4 = 4
IPv6 = 41
IPv6FragmentHeader = 44
IPv6NoNextHeader = 59
IPv6RoutingHeader = 43
Ipx = 1000
ND = 77
Pup = 12
Raw = 255
Spx = 1256
SpxII = 1257
Tcp = 6
Udp = 17
Unknown = -1
Unspecified = 0