Australia: A federal Nationals senator has raised concerns about receiving internet addresses as answers to questions directed to senior public servants.

"There have been a number of portfolio-related issues that have been answered in this way," NSW senator Fiona Nash told a Senate estimates committee today.

"It's entirely inappropriate."

The question-and-answer process of estimates hearings was "about asking officials questions" which should be answered in detail rather than by providing internet addresses for senators to visit, she said.

Communications Minister Stephen Conroy said he was happy to take up Senator Nash's concerns.

"I do have some sympathy, having it happen to me on a number of occasions," Senator Conroy said.

"I'm more than happy to take up, on your behalf, this matter and have a chat with the (Transport) minister (Anthony Albanese)."