The 386 supports four privilege rings (0 through 3), though in practice nearly all operating systems use just two: ring 0 for the kernel and ring 3 for user programs. Three privilege levels interact on every segment access: CPL (Current Privilege Level), DPL (Descriptor Privilege Level), and RPL (Requested Privilege Level).
Up to 10 simultaneous connections
，这一点在同城约会中也有详细论述
In total, directors generally spend between one and three hours a week on activities relating to their position on the Board of Directors.
ConsCompared to other top PLR sites, this one is a bit more expensive.