Final answer:
Category 5, or Cat5, twisted pair cables support a signaling rate of 100 MHz and are used for high-speed data transmission in networking.
Step-by-step explanation:
The category of twisted pair cable that supports a signaling rate of 100 MHz is Category 5, often abbreviated as Cat5. This type of cable is commonly used in computer networking and telecommunications applications. It is designed to deliver high-speed data transmission, facilitating network speeds of up to 1000 Mbps (Gigabit Ethernet) over short distances.