Refer to the exhibit. A network administrator has configured ACL 9 as shown. Users on the 172.31.1.0 /24 network cannot forward traffic through router CiscoVille. What is the most likely cause of the traffic failure?

Refer to the exhibit. A network administrator has configured ACL 9 as shown. Users on the 172.31.1.0 /24 network cannot forward traffic through router CiscoVille. What is the most likely cause of the traffic failure?

CCNA3 v7 – ENSA – Modules 3 – 5 Network Security Exam Answers 05

CCNA3 v7 – ENSA – Modules 3 – 5 Network Security Exam Answers 05

  • The permit statement specifies an incorrect wildcard mask.
  • The sequence of the ACEs is incorrect.
  • The established keyword is not specified.
  • The port number for the traffic has not been identified with the eq keyword.
    Answers Explanation & Hints:

    When verifying an ACL, the statements are always listed in a sequential order. Even though there is an explicit permit for the traffic that is sourced from network 172.31.1.0 /24, it is being denied due to the previously implemented ACE of CiscoVille(config)# access-list 9 deny 172.31.0.0 0.0.255.255 . The sequence of the ACEs must be modified to permit the specific traffic that is sourced from network 172.31.1.0 /24 and then to deny 172.31.0.0 /16.

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