NSFNET growth until 1995 Donna Cox and Robert Patterson The National Center for Supercomputing Applications (NCSA), National Science Foundation's Supercomputer Centers Program University of Illinois at Urbana-Champaign URL: http://www.ncsa.illinois.edu Visualization Thumbnail Credits / Contact Info Authors: Donna Cox Robert Patterson NCSA Data provided by: Merit Network, Inc. NCAR NASA JPL Contact Info: For further information, send email to: media@ncsa.uiuc.edu Additional Media: Video depicting two year's of growth of NSFNET (1992-94?

NSFNET growth until 1995 Donna Cox and Robert Patterson The National Center for Supercomputing Applications (NCSA), National Science Foundation's Supercomputer Centers Program University of Illinois at Urbana-Champaign URL: http://www.ncsa.illinois.edu Visualization Thumbnail Data Data Sources: (Source1): Traffic bandwidth in bytes passing through each of the backbone nodes was provided by Merit Network, Inc., NCAR, and NASA JPL. During December 1994, total inbound traffic on the backbone was 18.5 trillion bytes. Data Aggregation:

NSFNET growth until 1995 Donna Cox and Robert Patterson The National Center for Supercomputing Applications (NCSA), National Science Foundation's Supercomputer Centers Program University of Illinois at Urbana-Champaign URL: http://www.ncsa.illinois.edu Visualization Thumbnail Evaluation Strengths: (Strength1): Visualization stresses the hierarchy of connections between backbone systems. Backbone nodes are prominently displayed above the geographical map, with all their respective clients below. (Strength2): High level connectivity is readily perceivable when separated from the clutter of backbone-client connections.

NSFNET growth until 1995 Donna Cox and Robert Patterson The National Center for Supercomputing Applications (NCSA), National Science Foundation's Supercomputer Centers Program University of Illinois at Urbana-Champaign URL: http://www.ncsa.illinois.edu Visualization Thumbnail About the Visualization Visualization Techniques: (Technique1): Backbone nodes are elevated above the geographical map to imply that all data transfer must first travel up to the backbone, then back down to its final destination elsewhere on the map. Backbone nodes are also represented as red spheres at their geographic position on the map of the USA.