Network and Security (Foundations (D315))
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Free Network and Security (Foundations (D315)) Questions
Which of these best states the purpose of IKE Phase 2
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Authenticate the two endpoints.
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Establish an SA for the actual IPSec (data transfer) connection.
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Establish a new session key for use in creating IPSec SA instances.
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Validation of endpoint-provided public keys.
Explanation
Correct Answer B. Establish an SA for the actual IPSec (data transfer) connection.
Explanation
Internet Key Exchange (IKE) Phase 2 is responsible for establishing a secure IPSec Security Association (SA), which is used for encrypting and protecting actual data transmissions between two endpoints. This phase negotiates encryption and integrity parameters, generates additional keys, and ensures that the data exchanged remains secure throughout the communication session. It builds upon the secure channel established in IKE Phase 1, making sure that encrypted data can be securely transmitted.
Why other options are wrong
A. Authenticate the two endpoints.
Endpoint authentication occurs during IKE Phase 1, not Phase 2. In IKE Phase 1, the two devices authenticate each other using pre-shared keys, digital certificates, or other authentication mechanisms before establishing a secure channel for further negotiation. IKE Phase 2 focuses on securing data transfer, not initial authentication.
C. Establish a new session key for use in creating IPSec SA instances.
While IKE Phase 2 does involve key generation, its primary purpose is to establish an IPSec SA for data transfer. Key exchange is a part of this process, but the main goal is to set up the security association that will define the parameters for encrypting and securing data. Key generation alone does not fully describe the purpose of IKE Phase 2.
D. Validation of endpoint-provided public keys.
Public key validation typically occurs during IKE Phase 1, where endpoints authenticate each other before further negotiations. IKE Phase 2 is focused on negotiating encryption and integrity mechanisms for secure communication, not on validating public keys.
A company wants to improve collaboration between its attack and defense teams to strengthen security strategies.
Which security team is responsible for discussing lessons learned during the security exercise?
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White team
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Purple team
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Blue team
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Red team
Explanation
Correct Answer:
Purple team
Explanation:
The Purple team is responsible for bridging the gap between the Red team (attackers) and the Blue team (defenders). Their main role is to facilitate collaboration and ensure that lessons learned from attack-defense exercises are communicated effectively. This helps strengthen security strategies by combining offensive insights with defensive improvements. While Red teams simulate attacks, Blue teams defend, and White teams oversee and manage exercises, it is the Purple team that ensures joint learning and strategy improvement.
A security analyst investigates suspicious login activity using system logs. Which AAA category is being used?
- Authorization
- Accounting
- Confidentiality
- Authentication
Explanation
Explanation
Correct answer: (B.) Accounting
A refers to Authentication, Authorization, and Accounting. Accounting (also called auditing in some contexts) involves tracking and recording user activities, such as login attempts, system access, and actions performed. System logs are a primary source of accounting data used for investigations and monitoring suspicious behavior. Authentication verifies identity, authorization controls access, and confidentiality protects data.
Port security refers to what type of security control
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Allowing only specific MAC addresses to access a network port
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The controls used to protect ports when oceangoing vessels dock
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A technical control that requires authentication by a user before a port is used
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A layer 3 filter applied to switch ports
Explanation
Correct Answer A. Allowing only specific MAC addresses to access a network port
Explanation
Port security is a network security feature that restricts access to switch ports by limiting the MAC addresses that can connect to them. This helps prevent unauthorized devices from gaining access to the network, mitigating threats like MAC flooding and unauthorized network access.
Why other options are wrong
B. The controls used to protect ports when oceangoing vessels dock
While the term "port security" might suggest maritime security, in networking, it specifically refers to securing network switch ports, not physical docking ports for ships.
C. A technical control that requires authentication by a user before a port is used
Port security does not directly involve user authentication. Instead, it relies on MAC address filtering to control which devices can access a switch port.
D. A layer 3 filter applied to switch ports
Port security operates at Layer 2 (Data Link Layer) by controlling MAC address access. Layer 3 filtering, such as IP filtering, is typically associated with routing and firewall rules rather than port security on switches.
A company uses software hosted and managed by a third-party provider, eliminating the need for installation or maintenance on local devices.
Which type of cloud service model is being used?
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Virtualization
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Platform as a service (PaaS)
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Infrastructure as a service (IaaS)
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Software as a service (SaaS)
Explanation
Correct Answer:
Software as a service (SaaS)
Explanation:
Software as a Service (SaaS) delivers applications over the internet that are hosted and managed by a third-party provider. This removes the need for users to install, maintain, or update the software locally. Examples include Gmail, Microsoft 365, and Salesforce, where the provider handles all infrastructure and application management while the user simply accesses the service via a web browser.
A company migrates to the cloud to lower IT costs, improve agility, and enhance remote collaboration. Which benefit of cloud computing does this scenario illustrate?
- Community cloud
- Virtualization
- Operational efficiency
- Hybrid deployment
Explanation
Explanation
Correct answer: (C.) Operational efficiency
Cloud computing benefits include cost reduction, improved scalability, agility, and better collaboration. These outcomes collectively describe operational efficiency, which refers to using cloud resources to streamline IT operations and improve productivity while reducing overhead. The other options are not benefits: community cloud and hybrid deployment are deployment models, and virtualization is a technology that enables cloud computing rather than a benefit itself.
Which of the following is an example of local authentication
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A system that uses an external RADIUS server for authentication
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A system that uses the Kerberos protocol for authentication
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A system that authenticates users without network communication
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A system that requires a password and a retinal scan for authentication
Explanation
Correct Answer C. A system that authenticates users without network communication
Explanation
Local authentication occurs when a system verifies user credentials without relying on an external network or authentication server. This means authentication takes place directly on the device or system itself, typically using locally stored credentials such as usernames and passwords, biometric data, or security tokens. This method ensures access even when the system is offline, providing security without requiring network connectivity.
Why other options are wrong
A. A system that uses an external RADIUS server for authentication
This is incorrect because a RADIUS (Remote Authentication Dial-In User Service) server provides centralized authentication over a network. Since it requires network communication to validate credentials, it does not qualify as local authentication.
B. A system that uses the Kerberos protocol for authentication
This is incorrect because Kerberos is a network-based authentication protocol that relies on a centralized authentication server (Key Distribution Center) to issue and verify credentials. Since it requires network communication, it does not meet the definition of local authentication.
D. A system that requires a password and a retinal scan for authentication
This is incorrect because multi-factor authentication (MFA) involving a password and retinal scan does not necessarily indicate local authentication. If the authentication process involves a networked authentication server, it would not qualify as local authentication.
A software company needs a cloud-based environment that allows developers to write, test, and deploy applications without managing the underlying infrastructure. Which cloud service model is being used?
- Software as a service (SaaS)
- Platform as a service (PaaS)
- Public cloud
- Infrastructure as a service (IaaS)
Explanation
Explanation
Correct answer: (B.) Platform as a service (PaaS)
The described scenario matches Platform as a Service (PaaS), which provides a managed environment where developers can build, test, and deploy applications without having to handle underlying infrastructure such as servers, storage, or operating systems. This allows teams to focus on application development rather than system administration. SaaS delivers fully built applications to end users, IaaS provides raw infrastructure resources that still require management, and “public cloud” refers to a deployment model rather than a service layer.
In IT audit perspective, which of the following is a major risk of shared user accounts
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Change of passwords
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Unauthorized access
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User accountability
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Security thread
Explanation
Correct Answer C. User accountability
Explanation
Shared user accounts pose a major risk in IT audits because they eliminate individual accountability. When multiple users share the same credentials, it becomes impossible to track who performed specific actions. This increases security risks and violates best practices in access control.
Why other options are wrong
A. Change of passwords.
This is incorrect because while changing passwords is necessary for security, it is not the biggest risk of shared accounts. In fact, frequent password changes can cause operational inefficiencies when multiple users rely on a single account.
B. Unauthorized access.
This is incorrect because shared accounts do not directly cause unauthorized access. Instead, they increase the risk of unauthorized access due to weak access controls. However, the primary concern from an IT audit perspective is the inability to trace actions to a single user.
D. Security thread.
This is incorrect because "security thread" is not a valid term in IT security. The intended term might be "security threat", but even so, the primary audit risk remains user accountability rather than just general security threats.
Which layer of the OSI model includes IP addresses?
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Transport
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Network
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Application
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Session
Explanation
Correct Answer:
Network
Explanation:
IP addresses operate at the Network layer of the OSI model. This layer is responsible for logical addressing, routing, and delivering packets from the source device to the destination across multiple networks. The Internet Protocol (IP) is the primary protocol used here, enabling devices to be uniquely identified and ensuring that data reaches the correct location.
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Frequently Asked Question
The 200+ practice questions are designed to test your understanding of key concepts, protocols, and network security principles covered in ITEC 2112. These questions closely simulate the format of real exam questions, allowing you to assess your readiness and identify areas that need further study.
ULOSCA offers layer-by-layer mastery of the OSI model through interactive explanations and detailed network diagrams. Each layer’s role in data transmission is explained with practical examples, ensuring that learners develop a comprehensive understanding of how data moves through a network from the Physical to the Application layer.
ULOSCA’s subscription covers essential network security principles, including: Firewall configurations Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) Encryption standards such as SSL/TLS and IPsec Authentication and access control mechanisms Best practices for securing both data in transit and data at rest, ensuring that you are prepared to defend against common vulnerabilities.
The 200+ practice questions are designed to test your understanding of key concepts, protocols, and network security principles covered in ITEC 2112. These questions closely simulate the format of real exam questions, allowing you to assess your readiness and identify areas that need further study.
ULOSCA (Understanding Layers of the OSI Model) is a structured approach designed to help you grasp the OSI (Open Systems Interconnection) model in depth by breaking down each layer and its functionalities in a clear, methodical way.