Cat 5 is the least used out of these cables due to its slow speed which is 10/100 Mbps at up to 100MHz bandwidth. Cat 5e on the other hand is the most used category cable and was designed to reduce crosstalk, keeping signals or channels from interfering with each other. Cat 6 is the real deal and is able to go up to 10 gigabit Ethernet at 250MHz with an internal separator for isolating pairs from one another. Cat 6 is a great choice for future proofing your system. Lastly, Cat 7 is the most expensive and most durable option typically used for cabling infrastructures of gigabit Ethernet performing up to 600MHz.
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