Table 5.
Service ability to block content scraping by different bots (Gray box and Black box tests) (
: Blocked, 
: Some automation tools can bypass, 
: Failed to block)
Official websites use .gov
A
.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.