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The correct answer is B.

OBJ-4.4: Transport Layer Security (TLS) is used to secure web connections over port 443. Since port 443 was in use, you should expect either HTTPS, SSL, or TLS to be used as the protocol. If not, this would be suspicious activity and should be investigated. In fact, since this was a connection from the external IP to an internal host over port 443, this is suspicious and could be indicative of a remote access trojan on your host.

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