This read-write integer specifies the value of the least-significant bit used when constructing the IP broadcast address for this interface, where 1 corresponds to the standard all-ones broadcast convention, applying to both subnet and network broadcast addresses. An admin would only change this from the standard all-ones convention to support legacy equipment expecting all-zeros broadcast addressing. For example, on a network with older hosts expecting all-zeros broadcasts, the admin would set this bit differently than the modern default to maintain compatibility.