Explanation
A concern associated with virtualization is that performance issues with the host could impact the guest operating systems, which are the operating systems that run on virtual machines within the host. For example, if the host has insufficient memory, CPU, disk space, or network bandwidth, it could affect the performance and availability of the guest operating systems and the applications running on them. The physical footprint of servers could decrease within the data center, processing capacity may be shared across multiple operating systems, and one host may have multiple versions of the same operating system are not concerns associated with virtualization, but rather benefits or features of virtualization that can help reduce costs, improve efficiency, and enhance flexibility. References: CISA Review Manual (Digital Version), Chapter 4:
Information Systems Operations and Business Resilience, Section 4.2: IT Service Delivery and Support

Explanation/Reference:
Procedures to prevent scope creep are baselined in the design phase of the systems-development life cycle (SDLC) model.

Explanation/Reference:
Business unit management is responsible for implementing cost-effective controls in an automated system.

Section: Information System Acquisition, Development and Implementation

Explanation/Reference:
Explanation:
A backdoor is a method of bypassing normal authentication procedures.
Many computer manufacturers used to preinstall backdoors on their systems to provide technical support for customers. Hackers typically use backdoors to secure remote access to a computer, while attempting to remain hidden from casual inspection. To install backdoors, hackers prefer to use either Trojan horse or computer worm.