What is the most common port used when connecting an Internet Explorer browser to a proxy server for use with HTTP connections?
A. 53
B. 80
C. 443
D. 21
B. Port 80 is the most common port used for making proxy connections to web servers. Port 53 is the port associated with DNS. Port 443 is associated with HTTPS. Port 21 is associated with FTP. Although Port 21 and Port 443 can be used when making proxy connections, Port 80 is by far the most common.
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