What is MACsec? $($D$6,$ L$5\mathrm{.}4)$

$1$ point

The implementation of IPsec for MAC OS X

Special hardening techniques to prevent MAC address spoofing

A security technology that provides point$-$topoint security on Ethernet links between directly connected nodes

A security option for SDNs that accommodates the dynamic assignment of MAC addresses to new instances of virtual machines.