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GCIH · Question #73

You are the Administrator for a corporate network. You are concerned about denial of service attacks. Which of the following measures would be most helpful in defending against a Denial-of-Service…

The correct answer is C. Shorten the timeout for connection attempts. Shortening connection timeouts limits how long incomplete connections consume server resources, reducing the effectiveness of connection-flooding DoS attacks.

Incident Response & Cyber Kill Chain

Question

You are the Administrator for a corporate network. You are concerned about denial of service attacks. Which of the following measures would be most helpful in defending against a Denial-of-Service (DoS) attack?

Options

  • AImplement network based antivirus.
  • BPlace a honey pot in the DMZ.
  • CShorten the timeout for connection attempts.
  • DImplement a strong password policy.

How the community answered

(35 responses)
  • A
    11% (4)
  • B
    3% (1)
  • C
    77% (27)
  • D
    9% (3)

Why each option

Shortening connection timeouts limits how long incomplete connections consume server resources, reducing the effectiveness of connection-flooding DoS attacks.

AImplement network based antivirus.

Network-based antivirus detects and blocks malicious code execution, but does not mitigate DoS attacks which exploit resource exhaustion rather than malware.

BPlace a honey pot in the DMZ.

A honeypot is a decoy system used to study attacker behavior and gather threat intelligence, not to actively defend against or absorb DoS traffic.

CShorten the timeout for connection attempts.Correct

DoS attacks such as SYN floods exhaust server resources by maintaining many half-open connections. Shortening the timeout for connection attempts forces the server to release those resources sooner, limiting the attacker's ability to hold them hostage and directly reducing the attack's impact on availability.

DImplement a strong password policy.

A strong password policy prevents unauthorized authentication, but DoS attacks do not require credentials and target service availability rather than confidentiality.

Concept tested: DoS mitigation via connection timeout tuning

Source: https://www.cisco.com/c/en/us/about/security-center/synflood.html

Topics

#DoS defense#connection timeout tuning#SYN flood mitigation#network hardening

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