| Subject | English | French |
| comp., MS | custom subnet mask | masque de sous-réseau personnalisé (A subnet mask that is not based on the Internet address classes. Custom subnet masks are commonly used when subnetting) |
| comp., MS | default subnet mask | masque de sous-réseau par défaut (A subnet mask that is used on an Internet Protocol version 4 (IPv4) class-based network. The subnet mask for Class A is 255.0.0.0. The subnet mask for Class B is 255.255.0.0. The subnet mask for Class C is 255.255.255.0) |
| comp., MS | subnet mask | masque de sous-réseau (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) |