olemus
bittmask alamvõrguosa väljaeraldamiseks IP-aadressist

Wiktionary:
(computing) the routing prefix of a network address



ülevaateid
https://en.wikipedia.org/wiki/Subnetwork

http://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html

https://www.aelius.com/njh/subnet_sheet.html

vt ka
- alamvõrgustus