The type of firewall that provides the greatest degree of control against hacker intrusion is an application level gateway. A firewall is a device or software that filters or blocks network traffic based on predefined rules or policies. A firewall can help protect an information system or network from unauthorized access or attack by hackers or other malicious entities. An application level gateway is a type of firewall that operates at the application layer of the network model (layer 7), which is where user applications communicate with each other over the network. An application level gateway provides the greatest degree of control against hacker intrusion, by inspecting and analyzing the content and context of each network packet at the application level, such as protocols, commands, requests, responses, etc., and allowing or denying access based on specific criteria or conditions. An application level gateway can also perform additional functions such as authentication, encryption, caching, logging, etc., to enhance the security and performance of network traffic.
A circuit gateway is a type of firewall that operates at the transport layer of the network model (layer 4), which is where data are transferred between end points over the network. A circuit gateway provides a moderate degree of control against hacker intrusion by establishing a secure connection between two end points (such as client and server) and relaying network packets between them without inspecting or analyzing their content. A circuit gateway can also perform functions such as encryption, authentication, or address translation to improve the security and privacy of network traffic. A packet filtering router is a type of firewall that operates at the network layer of the network model (layer 3), which is where data are routed between different networks or subnets. A packet filtering router provides a low degree of control against hacker intrusion by examining the header of each network packet and allowing or denying access based on basic criteria such as source address, destination address, port number, protocol, etc. A packet filtering router can also perform functions such as routing, forwarding, or address translation to optimize the delivery and efficiency of network traffic. A screening router is a type of firewall that operates at the network layer of the network model (layer 3), which is where data are routed between different networks or subnets. A screening router provides a low degree of control against hacker intrusion by examining the header of each network packet and allowing or denying access based on basic criteria such as source address, destination address, port number, protocol, etc. A screening router can also perform functions such as routing, forwarding, or address translation to optimize the delivery and efficiency of network traffic.

The first step in the incident response process for a suspected breach is to research the validity of the alerted breach. An incident response process is a set of procedures that defines how to handle security incidents in a timely and effective manner. The first step in this process is to research the validity of the alerted breach, which means to verify whether the alert is genuine or false positive, to determine the scope and impact of the incident, and to gather relevant information for further analysis and action. Informing potentially affected customers of the security breach, notifying business management of the security breach, and engaging a third party to independently evaluate the alerted breach are also steps in the incident response process, but they are not the first step. References:
* CISA Review Manual, 27th Edition, page 4251
* CISA Review Questions, Answers & Explanations Database - 12 Month Subscription

The type of IS audit that would provide the greatest level of assurance that the department's objectives have been met after implementing new technologies and processes is an integrated audit. An integrated audit is an audit that combines financial, operational, compliance, and IT auditing aspects to provide a holistic view of the organization's performance and risks. An integrated audit can evaluate whether the new technologies and processes are aligned with the organization's goals, strategies, policies, and controls, and whether they are delivering value, efficiency, effectiveness, and reliability. The other types of IS audits (A, C and D) would not provide the same level of assurance, as they would only focus on specific aspects of the organization's activities, such as performance, cyber security, or financial reporting, which may not capture the full impact of the new technologies and processes. References: CISA Certification | Certified Information Systems Auditor | ISACA, CISA Review Manual (Digital Version), Chapter 1: The Process of Auditing Information Systems, Section 1.2: Types of IS Audit Engagements

The metric that best indicates the effectiveness of awareness training is the number of users reporting receipt of the email to the information security team. This shows that the users are able to recognize and report a phishing email, which is a common social engineering technique used by attackers to trick users into revealing sensitive information or installing malicious software. The other metrics do not demonstrate a high level of security awareness, as they either ignore, follow, or forward the phishing email, which could expose the organization to potential risks. References: CISA Review Manual, 27th Edition, page 326