Prime Minister Malcolm Turnbull's claims over the Coalition's much-maligned NBN roll-out has come under increasing pressure as a new report revealed Australia has significantly dropped in the global ranks for internet speeds.

It's the copper elephant in the room the PM and his ministers have continually been called out on, with critics demanding answers about the future viability of Australia's broadband network.

On Monday night's Q&A on ABC , Mr Turnbull was asked by an audience member to clearly explain whether or not his party will be future proofing its NBN, which relies heavily on obsolete copper technology.

"Prime Minister, the NBN your Government has implemented, while being cheaper, is proven to be outdated and much slower than the Labor Government’s NBN scheme," an audience member asked.

"How will you ensure the NBN will be future proofed so taxpayers do not end up paying twice?" the question continued.

What the audience got from the PM was the now stock-standard response senior party members like Christopher Pyne and Barnaby Joyce have delivered time and again.

Which party do you believe has the best National Broadband Network policy? Coalition 775 Labor 950

Mr Turnbull blamed the former Labor party for the country's NBN woes claiming their planned system had "ground to a halt in many parts of Australia".

However, three years on since the Coalition took government Australia has dropped on the global scale for internet speeds from 30th to 60th.

Data provided to the ABC's Fact Check claims the Coalition's policy of rolling out fibre to the node technology rather than fibre directly to people's homes is the likely cause of the decline.

In 2013, Labor's NBN promised download speeds of 1Gbps through an innovative fibre optics network linked directly to people's homes, on par with international standards.

However, the Coalition's version which relies heavily on outdated copper wiring, won't be completed until 2020 and will only provide download speeds of 25Mbps, well below the global average.