The extra 24 pins give the extra indicators necessary to route I/O back again through the system connector (audio, AC-Link, LAN, cellular phone-line interface). Variety II playing cards have RJ11 and RJ45 mounted connectors. These playing cards have to be Positioned at the edge of the computer or docking station https://nathanlabsadvisory.com/nist-800-cyber-security-frame-work/