Cat Rating (Category Rating)
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The performance classification of Ethernet cables (Cat5e, Cat6, Cat6a, Cat7, Cat8) indicating speed and frequency limits.
Cat5e supports 1 Gbps at 100 MHz. Cat6 adds 10 Gbps at 55m. Cat6a extends 10 Gbps to the full 100m at 500 MHz. Cat7 uses shielded pairs for 600 MHz. Cat8 reaches 25-40 Gbps at 2000 MHz but is limited to 30m. Higher categories require better installation practices to achieve rated performance.