Hi, all

Ethernet frame is composed of several field

Dest. mac address、Src. mac address
Length/Type 、Mac client data 、Pad 、FCS (trailer)

But I use Wireshark to capture my packet that from

my pc to gateway.

And I observed the result, finding that

there is not FCS field in each ethernet frame sometimes.

A few ethernet frame with FCS field.

What happened???
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