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sub·net·work | \ ˌsəb-ˈnet-ˌwərk 
\
\variants:
or sub-network
plural subnetworks or sub-networks
Definition of subnetwork
: a portion of a network : a network within a network
a health-care subnetwork telecommunications subnetworks If the data's destination is within the local subnetwork, the bridge discards it, thus cutting down on unnecessary network traffic.— Jackie Fox
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Time Traveler for subnetwork
The first known use of subnetwork was in 1924
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