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Exam 300-720 topic 1 question 84 discussion

Actual exam question from Cisco's 300-720
Question #: 84
Topic #: 1
[All 300-720 Questions]

Spammers routinely try to send emails with the recipient field filled with a list of all possible combinations of letters and numbers. These combinations, appended with a company’s domain name are malicious attempts at learning all possible valid email addresses. Which action must be taken on a Cisco ESA to prevent this from occurring?

  • A. Quarantine external authentication queries.
  • B. Enable end user safelist features.
  • C. Perform LDAP acceptance validation.
  • D. Select the SMTP Authentication Query checkbox.
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Suggested Answer: C 🗳️
by GVKD at June 20, 2023, 2:56 a.m.

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GVKD
10 months, 1 week ago
Selected Answer: C
Correct. Directory Harvest Attack Prevention within the SMTP Conversation: You can prevent DHAs by entering only domains in the Recipient Access Table (RAT), and performing the LDAP acceptance validation in the SMTP conversation. https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA_Admin_Guide_11_1/b_ESA_Admin_Guide_chapter_011010.html?bookSearch=true
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