It is recommended that you link to a webpage or website rather than reproducing or downloading it, as there are no copyright restrictions on linking to websites. However, you should not link to or use infringing material.
Many websites have terms and conditions that outline how material can be used. Unless you are required to login or agree to the terms and conditions before entering the websites, the terms are not legally binding. Material from the website can be used as permitted under the Copyright Act. If you do not have to accept the terms and conditions, then you can use material as permitted under either the Copyright Act or the terms if they allow your intended use. If there are no terms and conditions then you can only use material as permitted under the Copyright Act. See Using Copyright Material.
Some websites also licence material under open licensing schemes such as Creative Commons or GNU Free Licences. Generally, this material can be freely used provided the conditions of the licence are fulfilled. See Creative Commons Australia.
Websites are not protected as a separate category. Text on a website is protected as a literary work, images as artistic works, recorded music or sound, (e.g. podcasts) as sound recordings, and films, videos or vodcasts as cinematographic films.
Duration of copyright in websites will depend on the type of material. See Duration of Copyright
The creator of the content on a particular page or site will generally own copyright. For more information see Ownership of Copyright.