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-rw-r--r--pkg/tcpip/tcpip.go5
1 files changed, 4 insertions, 1 deletions
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 44f87e007..609b8af33 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -1029,7 +1029,10 @@ func (r Route) String() string {
// TransportProtocolNumber is the number of a transport protocol.
type TransportProtocolNumber uint32
-// NetworkProtocolNumber is the number of a network protocol.
+// NetworkProtocolNumber is the EtherType of a network protocol in an Ethernet
+// frame.
+//
+// See: https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
type NetworkProtocolNumber uint32
// A StatCounter keeps track of a statistic.