Cat-6 cable, often called Category 6, is a cable standard for Gigabit Ethernet and other network protocols, compatible with Category 5/5e and 3 cable standards. It offers stricter crosstalk and system noise specifications compared to Cat-5 and Cat-5e, delivering up to 250 MHz performance. These cables are Low Smoke Zero Halogen (LSZH), significantly reducing toxic and corrosive gas emissions during combustion.