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在大英帝國新屋拜四角

Virtual networking 101: Bridging the gap to understanding TAP
https://blog.cloudflare.com/virtual-networking-101-understanding-tap/

Tap is like a switch,
Ethernet headers it'll hitch.
Tun is like a tunnel,
VPN connections it'll funnel.
Ethernet headers it won't hold,
Tap uses, tun does not, we're told.

wow