This is design features a small navigation bar both on the top and the bottom of each page (though such a bar could be place at the top OR the bottom of each page, that is entirely a matter of choice). This system allows for a considerable ease of navigation, but it does have an impact on your costs when it comes to keeping this design updated.

Beacuse of the limited space that is available for a navigation bar that is placed across the screen, this design is not ideal for large sites, or for sites that need to retain a greater freedom to accomodate frequent expansions.