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The correct answer is B.

OBJ-4.2: Vulnerability patching is the process of checking your operating systems, software, applications, and network components for vulnerabilities that could allow a malicious user to access your system and cause damage, and then applying a security patch or reconfiguring the device to mitigate the vulnerabilities found. If there is a working exploit against the server’s encryption protocols, a technician must install a security patch to mitigate or correct this vulnerability. Both FTP and SMTP are considered insecure protocols and transmit data in plain text, therefore they would make the log files even more insecure by using these protocols. Port 22 is used by secure shell (SSH), which is encrypted by default. Blocking port 22 would prevent SSH from being used in the network and would not mitigate the vulnerability identified in this question.

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