A Disaster Recovery as a Service (DRaaS) provider is responsible for system recovery procedures, including restoring systems and services in a disaster scenario. This is the core functionality of DRaaS.
* Stakeholder Communications (Option B): This is typically managed internally by the organization to ensure alignment with its crisis management plan.
* Validation of Recovered Data (Option C): The organization must verify data integrity to meet business requirements.
* Maintaining Currency of Data (Option D): While DRaaS may handle data backups, the organization retains responsibility for ensuring the relevance of the data being backed up.
Reference: ISACA CISA Review Manual, Job Practice Area 4: Protection of Information Assets.

Validation controls are used to check the input data from the user before processing it on the server. If the validation controls are moved from the server side to the browser, it means that the user can modify or bypass them using tools such as browser developer tools, JavaScript console, or proxy tools. This would increase the risk of a successful attack by structured query language (SQL) injection, which is a technique that exploits a security vulnerability in an application's software layer that allows an attacker to execute arbitrary SQL commands on the underlying database. SQL injection can result in data theft, data corruption, or unauthorized access to the system.
Buffer overflow, denial of service (DoS), and phishing are not directly related to the validation controls in a web application. Buffer overflow is a type of attack that exploits a memory management flaw in an application or system that allows an attacker to write data beyond the allocated buffer size and overwrite adjacent memory locations. DoS is a type of attack that prevents legitimate users from accessing a service or resource by overwhelming it with requests or traffic. Phishing is a type of attack that uses fraudulent emails or websites to trick users into revealing sensitive information or installing malware.
References:
* Client-side form validation - Learn web development | MDN
* JavaScript: client-side vs. server-side validation - Stack Overflow
* SQL Injection - OWASP

The first step when planning an IS audit of a third-party service provider that monitors network activities is to review the roles and responsibilities of the third-party provider. This will help to establish the scope, objectives, and expectations of the audit, as well as to identify any potential risks, issues, or gaps in the service level agreement (SLA) between the organization and the provider. Reviewing the third party's monitoring logs and incident handling, evaluating the organization's third-party monitoring process, and determining if the organization has a secure connection to the provider are important steps, but they should be performed after reviewing the roles and responsibilities of the provider. References: CISA Review Manual (Digital Version)1, page 269.

Problem management is an IT service management activity that is most likely to help with identifying the root cause of repeated instances of network latency. Problem management involves analyzing incidents that affect IT services and finding solutions to prevent them from recurring or minimize their impact. Change management is an IT service management activity that involves controlling and documenting any modifications to IT services or infrastructure. Incident management is an IT service management activity that involves restoring normal service operation as quickly as possible after an incident has occurred.
Configuration management is an IT service management activity that involves identifying and maintaining records of IT assets and their relationships. References: ISACA, CISA Review Manual, 27th Edition, 2018, page 334