Which two statements about the Ethernet media are true? (Choose two.)

Twisting each pair of wires within a twisted-pair cable causes the electromagnetic fields of each wire to cancel each other out, reducing EMI and crosstalk between adjacent pairs. This is the core physical design principle that makes twisted-pair cabling viable for Ethernet across all categories from Cat5e to Cat8.

Single-mode fiber is designed for longer distances (up to tens of kilometers), not shorter distances - multimode fiber is the variant optimized for shorter-reach intra-building connections.

40 Gigabit Ethernet direct-attach twinax (DAC) cables use QSFP+ (Enhanced Quad Small Form-factor Pluggable) connectors, which multiplex four 10Gbps lanes to achieve 40Gbps aggregate throughput. QSFP+ provides the high-density, short-reach copper connectivity required for top-of-rack and end-of-row interconnects in data centers.

Twinax cables are a distinct cable type with two inner conductors within a single outer sheath and are not a variant of shielded twisted-pair (STP) or unshielded twisted-pair (UTP) cable.

Passive twinax (DAC) cables are limited to approximately 5 meters or less in reach and cannot reliably carry a signal beyond that distance, which requires active optical or active copper cables for longer runs.