| Subject | English | Ukrainian |
| comp., MS | custom subnet mask | користувацька маска підмережі (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 | маска основної підмережі (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) |