Question 280
A change advisory for Greenfield Services has two requirements: (1) ensure a specific host denial is evaluated before a broad permit, and (2) troubleshoot client association failure when the WLC has an incorrect pre-shared key. Which plan correctly handles both requirements?
Explanation
Correct Answer
Both outcomes are covered: (1) IOS ACL processing uses the first matching entry, so later entries are not checked after a match. (2) WPA2-Personal handshake succeeds only when both sides derive the same key material. Neither action is a substitute for the other.
Incorrect Answers
The second step covers (2), but the first addresses improve account defense against guessed short passwords. Length, uniqueness and rate controls resist common password guessing attacks. It leaves outcome (1) unfulfilled.
Neither step is the requested pair: Use a standard ACL deny for that source IP followed by required permits is for deny one known infected source IP regardless of destination using a simple filter, and Label the software weakness as a vulnerability and misuse as an exploit is for distinguish a software flaw from an attacker action exploiting it. Standard ACLs match IPv4 source addresses rather than destination ports. The proposed plan misses the two stated outcomes.
The first step covers (1), but the second addresses stop unprotected VTY authentication with a shared weak line password. Per-user authenticated access supports accountability and avoids weak shared credentials. It leaves outcome (2) unfulfilled.