What are two wiring schemes defined by the TIA/EIA organization for Ethernet installation?

The question focuses on wiring schemes specifically designed for Ethernet installations as delineated by the TIA/EIA organization. The correct response includes T568A and T568B, which are two established wiring standards used primarily for Ethernet network cabling.

T568A and T568B define the pinouts for terminating twisted-pair cables, such as Category 5e or Category 6 cables, which are commonly used for network connections. These standards ensure that the cable wires are connected consistently on both ends, facilitating reliable communication over the network.

The differentiation between T568A and T568B lies in the arrangement of the colored wires within the cable. Both standards support the same network speeds and distances but may be preferred in different organizational or installation contexts based on legacy systems, compatibility preferences, or local regulations.

Other options presented, such as TIA-485 and RS-232, refer to different communication standards and protocols rather than wiring schemes for Ethernet. TIA-485 is associated with serial communication, typically in industrial applications, while RS-232 is an older standard for serial communication over short distances, commonly used in connecting computers to peripherals. These standards serve entirely different purposes that do not pertain to Ethernet wiring.