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1 bit mask
"A numeric value intended for a bit-by-bit value comparison with other numeric values, typically to flag options in parameter or return values. Usually this comparison is done with bitwise logical operators, such as And and Or in Visual Basic, && and || in C++." -
2 access mask
"In Windows-based computers, a 32-bit value (a bitmask) that specifies the permissions that are assigned in an access control entry (ACE). An access mask is also part of the access request when an object is opened. The access mask in the request is compared to the access mask in each ACE to determine whether or not to grant the request." -
3 subnet mask
"A 32-bit value that enables the recipient of Internet Protocol version 4 (IPv4) packets to distinguish the network ID and host ID portions of the IPv4 address. Typically, subnet masks use the format 255.x.x.x. IPv6 uses network prefix notations rather than subnet masks."
См. также в других словарях:
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