Narrowband: Narrowband is loosely used to describe signals of low bandwidth. Dial-up connections are typically called narrowband connections.
NOC (Network Operations Centre): A group of people that is responsible for the day-to-day operations and maintenance of a network.
NVOD (Near Video On Demand): Individual demand system of films and events. Events repeatedly start with time laps between 5 and 15 minutes. Customer will see the availability and pays for the programs he demands.
Node: In communications, a node is a network junction or connection point.