Which situation requires TCP port 443 to be open for packets that are sourced from the Internet with a destination in th

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Which situation requires TCP port 443 to be open for packets that are sourced from the Internet with a destination in the corporate DMZ?

A. when video endpoints that reside on the Internet require administrative access to the Cisco Expressway Edge
B. when you require encrypted calls to endpoints on your corporate LAN
C. when you want to enable calls to web applications by using HTTP
D. when you require administrative access to the Cisco Expressway Edge from the Internet