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CPEH-001 · Question #156

Firewalk has just completed the second phase (the scanning phase) and a technician receives the output shown below. What conclusions can be drown based on these scan results? TCP port 21 - no…

The correct answer is C. The scan on port 23 passed through the filtering device. This indicates that port 23 was not. See the full explanation below for the reasoning.

Question

Firewalk has just completed the second phase (the scanning phase) and a technician receives the output shown below. What conclusions can be drown based on these scan results? TCP port 21 - no response TCP port 22 - no response TCP port 23 - Time-to-live exceeded

Options

  • AThe scan on port 23 was able to make a connection to the destination host prompting the firewall
  • BThe lack of response from ports 21 and 22 indicate that those services are not running on the
  • CThe scan on port 23 passed through the filtering device. This indicates that port 23 was not
  • DThe firewall itself is blocking ports 21 through 23 and a service is listening on port 23 of the target

How the community answered

(58 responses)
  • A
    9% (5)
  • B
    14% (8)
  • C
    74% (43)
  • D
    3% (2)

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