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The answer provided by @Benjoyo is not accurate. The CPU clock can be lower than the system clock, at least in microcontrollers. As seen in this link, the PIC microcontrollers have the CPU clock, with a rate of $f_{cy}$ (also called instruction cycle frequency), and the system clock, with a rate of $f_{osc}$ (oscillator frequency). Physically, what ...


1

Vector clocks overflow for the same reason that regular integers do. Vector clocks generally maintain a fixed number of bits per process to capture the event count for each respective process. There is naturally a maximum value that each of these bit strings can represent. Any one of these values can potentially be increased beyond their capacity, and thus ...


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