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It is very hard to detect a keylogger's activity. Hence, a Network Administrator should take the following steps as countermeasures against software keyloggers: Actively monitor the programs running on the server. Monitor the network whenever an application attempts to make a network connection. Use commercially available anti-keyloggers, such as PrivacyKeyboard. Update one's antivirus regularly. Use on-screen keyboards and speech-to-text conversion software which can also be useful against keyloggers, as there are no typing or mouse movements involved.

Answer: C is incorrect. An SNMP service is not used for keystroke logging. Hence, removing an SNMP agent may be a valid option if, and only if, the server is vulnerable to SNMP enumeration.