Figure 2.
Gateway Clusters (a) 4 Gateways, (b) 10 Gateways, (c) 17 Gateways, and (d) 30 Gateways.
Official websites use .gov
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.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.