The KMX AN and LT core consists of Auto-Negotiation and Link-Training modules for reliable communication with remote link partners. It conforms to IEEE 802.3ap-2007 standards, enhancing link quality for BER of 10^-12. Key features include AutoNeg RX and TX, various encoders and decoders, training engines, and control modules. It's applied in areas requiring ultra-low latency such as streaming, IP cameras, and high-speed data centers.