EC-Council
312-39 · Question #81
312-39 Question #81: Real Exam Question with Answer & Explanation
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Question
DNS logs in the SIEM show an internal host sending many DNS queries with long, encoded subdomains to an external domain. The queries predominantly use TXT records and occur during off- business hours. The external domain is newly registered and has no known business association.
Options
- AMonitoring DNS cache poisoning attempts
- BDetecting rogue DNS servers within the internal network
- CIdentifying DNS tunneling for data exfiltration
- DValidating DNS records for legitimate business operations
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