A report commissioned by the Federal Government on cyber safety has shed light on the scarcity of local data on online dangers, such as cyber bulling and cyber stalking, to children.

The first stage of the National Broadband Network has begun in Tasmania with an open competitive tender for fibre optic cable by Aurora Energy.

Australians will be unable to opt-out of the government's pending Internet content filtering scheme, and will instead be placed on a watered-down blacklist, experts say.