TITLE: ------------------------------------------------------------------------------- Three-Dimensional and Interactive Visualization of Graphs Generated From Information Extracted From Physical Computer Networks. ABSTRACT: ------------------------------------------------------------------------------- We present an environment for visualization and navigation in network graphs using different three-dimensional layouts. The graphs evaluated in this work were generated using information extracted from physical computer networks, were our environment was evaluated using the PUC Minas academic network. The proposed environment is multi-platform, extensible and uses the OpenGL API for rendering. Figure 1 shows examples of different layouts present in the proposed environment.