The greatest concern for an IS auditor when evaluating an organization's IT strategy and plans is that IT is not engaged in business strategic planning, as this indicates a lack of alignment between IT and business objectives, which could result in inefficient and ineffective use of IT resources and capabilities. The absence of a defined IT security policy, the nondistribution of business strategy meeting minutes, and the inadequate documentation of IT strategic planning are also issues that should be addressed by an IS auditor, but they are not as significant as IT's noninvolvement in business strategic planning. References: CISA Review Manual (Digital Version), Chapter 3, Section 3.1

Requiring a key code to be entered on the printer to produce hard copy is a method to prevent disclosure of classified documents printed on a shared printer. This is because requiring a key code adds an extra layer of security and authentication to the printing process, ensuring that only authorized users can access and retrieve the printed documents. Requiring a key code also prevents unauthorized users from viewingor tampering with the documents while they are in the printer's queue or output tray1.
Using passwords to allow authorized users to send documents to the printer is not a sufficient method to prevent disclosure of classified documents printed on a shared printer. This is because passwords only protect the transmission of the documents from the user's computer to the printer, but they do not protect the documents once they are printed. Passwords can also be compromised or forgotten by users, making them vulnerable to unauthorized access or denial of service2.
Encrypting the data stream between the user's computer and the printer is not a sufficient method to prevent disclosure of classified documents printed on a shared printer. This is because encryption only protects the confidentiality and integrity of the documents while they are in transit, but they do not protect the documents once they are printed. Encryption can also introduce performance issues or compatibility problems with different printers or devices2.
Producing a header page with classification level for printed documents is not a method to prevent disclosure of classified documents printed on a shared printer. This is because producing a header page only informs the users about the sensitivity and handling of the documents, but it does not prevent unauthorized users from accessing or viewing them. Producing a header page can also waste paper and ink, as well asincrease the risk of misplacing or mixing up the documents

Comprehensive and Detailed Explanation:
Fault tolerance refers to the ability of a system to continue functioning despite the occurrence of faults or hardware failures.
* Option A: Describes failover, not fault tolerance.
* Option B: Is a benefit but not the exact definition.
* Option D: Refers to load balancing, not fault tolerance.
# ISACA Reference: CISA Review Manual 27th Edition, Domain 2, section on system availability, resilience, and fault tolerance.