Local I/O expansion involves the addition of which of the following within the rack?

Local I/O expansion involves the addition of which of the following within the rack?

• A. A second processor
• B. A shift register
• C. Data-handling capabilities
• D. I/O points within the rack

Answer: (D)

Local I/O expansion means adding more input/output channels within the same rack by slipping in additional I/O modules on the rack’s backplane. This increases how many signals (sensors and actuators) the system can handle without moving processing power elsewhere. The option that best fits this idea is the one describing I/O points within the rack, since it directly refers to adding more I/O channels in the rack. The other options—adding a second processor, a shift register, or just greater data-handling capabilities—do not increase the number of I/O channels in the rack and thus are not about local I/O expansion.

Local I/O expansion means adding more input/output channels within the same rack by slipping in additional I/O modules on the rack’s backplane. This increases how many signals (sensors and actuators) the system can handle without moving processing power elsewhere. The option that best fits this idea is the one describing I/O points within the rack, since it directly refers to adding more I/O channels in the rack. The other options—adding a second processor, a shift register, or just greater data-handling capabilities—do not increase the number of I/O channels in the rack and thus are not about local I/O expansion.