CompTIA
CAS-003 · Question #153
The security engineer receives an incident ticket from the helpdesk stating that DNS lookup requests are no longer working from the office. The network team has ensured that Layer 2 and Layer 3…
The correct answer is D. NMAP. NMAP works as a port scanner and is used to check if the DNS server is listening on port 53.
Enterprise Security Operations
Question
The security engineer receives an incident ticket from the helpdesk stating that DNS lookup requests are no longer working from the office. The network team has ensured that Layer 2 and Layer 3 connectivity are working. Which of the following tools would a security engineer use to make sure the DNS server is listening on port 53?
Options
- APING
- BNESSUS
- CNSLOOKUP
- DNMAP
How the community answered
(41 responses)- A2% (1)
- C5% (2)
- D93% (38)
Explanation
NMAP works as a port scanner and is used to check if the DNS server is listening on port 53.
Topics
#DNS#port scanning#NMAP#network troubleshooting
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