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Question

Lin believes that the organization she is scanning may have load balancers in use. Which of the following techniques will help her detect them if they are DNS-based load balancers?

a.

Use Nmap and look for service port differences.

b.

Use ping and check for TTL and IP changes.

c.

Use Nessus and check for service version differences.

d.

Use WHOIS to check for multiple hostnames.

Answer: (b).Use ping and check for TTL and IP changes. Explanation:Checking for DNS load balancing via ping requires checking time to live (TTL) and IP address differences. Using Nmap or Nessus is less likely to be successful, because most devices in a pool should provide the same services and service versions. WHOIS records do not show load balancing details.

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Q. Lin believes that the organization she is scanning may have load balancers in use. Which of the following techniques will help her detect them if they are DNS-based load balancers?

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