Failopen mode

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Failopen mode is a secondary mode of functionality supported by nearly all network switches - in this mode of operation, a switch will forward all packets sent to it to all connected network devices, rather than forwarding the packets directly to the destination. It is intended to guarantee transmission of packets to their destination in the case that the switch's integrity is compromised. However, this mode of operation makes switches susceptible to attacks such as MAC flooding, which can open up large portions of a network to analysis by a potential cracker.

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