Question 50
A vendor invoice arrives from a near-match domain and requests immediate wire transfer to an unknown bank. Which Cisco security control or operational response BEST addresses the stated need?
Explanation
Correct Answer
Verify payment or access-change requests through an independently established channel and enforce dual approval for high-impact changes. This control addresses the failure mechanism and narrows the enforcement boundary. A convincing display name or reply chain does not prove a sender can authorize sensitive financial and access changes. Confirm pre-change conditions using: Review message authentication results, sender/domain similarities, original contact directory, transaction changes, and escalation records. Situation: A vendor invoice arrives from a near-match domain and requests immediate wire transfer to an unknown bank.
Incorrect Answers
Treat retrieved pages, documents, and tool responses as untrusted data and enforce tool authorization outside model-generated instructions. This response applies to Prompt injection trust boundary, not the controlling requirement in this case. Prompt injection occurs when lower-trust content is promoted to instruction authority; blocking unsafe tool effects requires enforcement beyond prompt wording. For this scenario, the targeted action is: Verify payment or access-change requests through an independently established channel and enforce dual approval for high-impact changes. Situation: A vendor invoice arrives from a near-match domain and requests immediate wire transfer to an unknown bank.
Validate peer identity with a trusted certificate chain, correct hostname, certificate validity, and appropriate TLS policy before exchanging sensitive data. This response applies to TLS certificate authentication and PKI, not the controlling requirement in this case. Encryption without authenticated identity does not rule out interception; certificates bind a public key to a verified name under a trust chain. For this scenario, the targeted action is: Verify payment or access-change requests through an independently established channel and enforce dual approval for high-impact changes. Situation: A vendor invoice arrives from a near-match domain and requests immediate wire transfer to an unknown bank.
Combine suspicious message reporting, web destination inspection, reputation controls, and user training with enforceable authentication policies. This response applies to Phishing containment and domain verification, not the controlling requirement in this case. A secure email channel and DNS/web controls reduce exposure but cannot certify that every newly registered domain is benign. For this scenario, the targeted action is: Verify payment or access-change requests through an independently established channel and enforce dual approval for high-impact changes. Situation: A vendor invoice arrives from a near-match domain and requests immediate wire transfer to an unknown bank.


