The security team is assessing the relative security of four IM products. Which of the following sets of features provides the most secure solution?
A. protocol used is IRC over TLS, uses FTP for file exchange and video provided by Flash
B. protocol used is Jabber, uses FTP for file exchange and video provided by Flash
C. protocol used is XMPP over TLS, uses SCP for file exchange and video provided by H.323 over TLS
D. protocol used is SIP, uses RCP for file exchange and video provided by H.323
C
Explanation: This option is only one that uses encryption to secure all three features: the protocol, the file exchange process, and the video.
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