Final answer:
Ethernet cables for hubs and switches must meet strict specifications to minimize crosstalk, and higher-quality versions like Cat6 or Cat7 are more expensive due to better materials and shielding.
Step-by-step explanation:
Hubs and switches require ethernet cables that adhere to strict specifications to reduce crosstalk and ensure data integrity. For these devices to perform optimally, cables such as Cat6 or Cat7 are typically used, which are designed to support higher bandwidths and reduce interference compared to their predecessors like Cat5 or Cat5e. These enhanced cables are indeed more expensive due to the higher-quality materials used and the additional shielding that protects against crosstalk.