Network and Security (Foundations (D315))
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Free Network and Security (Foundations (D315)) Questions
A business configures its network with a central device that connects multiple workstations.
Which topology is being used?
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Mesh
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Ring
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Bus
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Star
Explanation
Correct Answer:
Star
Explanation:
A star topology connects all devices to a central device such as a switch or hub. Each workstation communicates through the central device, which manages data transmission between nodes. This design improves network performance and makes it easier to isolate faults, since a failure in one connection does not affect the others. Unlike mesh, ring, or bus topologies, the star topology relies on a central connection point to manage communication.
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.
Why is Role-Based Access Control gaining popularity in the security industry
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When using RBAC, the system can automatically grant or deny access to an asset without needing to have it explicitly defined
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The model allows permissions to be organized more logically according to what each individual's responsibilities are.
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RBAC allows more "fine-grained" control over individual assets
Explanation
Correct Answer B. The model allows permissions to be organized more logically according to what each individual's responsibilities are.
Explanation
Role-Based Access Control (RBAC) is gaining popularity because it streamlines permission management by assigning access rights based on predefined roles rather than individual users. This logical organization ensures that users have only the necessary permissions for their responsibilities, reducing the risk of unauthorized access while simplifying security administration. RBAC is widely used in enterprises to enhance security, improve compliance, and minimize administrative overhead.
Why other options are wrong
A. When using RBAC, the system can automatically grant or deny access to an asset without needing to have it explicitly defined
This is incorrect because RBAC requires predefined roles and associated permissions. Access rights are explicitly defined based on roles rather than being granted automatically without any predefinition.
C. RBAC allows more "fine-grained" control over individual assets
This is incorrect because RBAC typically provides broad access control based on roles rather than fine-grained, per-object permissions. More detailed control mechanisms, such as Attribute-Based Access Control (ABAC) or Discretionary Access Control (DAC), are often required for highly granular security management.
A software company signs its applications with a digital certificate to verify that updates come from a trusted source.
Which CIA principle does this protect?
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Redundancy
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Confidentiality
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Integrity
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Availability
Explanation
Correct Answer:
Integrity
Explanation:
Digital certificates are used to ensure that software and updates have not been tampered with and that they originate from a trusted source. This directly enforces the principle of integrity, which focuses on maintaining the accuracy, reliability, and trustworthiness of information and software by preventing unauthorized modifications.
What is the purpose of port numbers in networking
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To identify devices on the network
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To encrypt data during transmission
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To specify the application or service
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To establish a connection
Explanation
Correct Answer C. To specify the application or service
Explanation
Port numbers are used in networking to identify specific applications or services running on a device. When data is transmitted over a network, the port number ensures that it is directed to the correct process or service on the receiving device. For example, HTTP typically uses port 80, while HTTPS uses port 443. This system allows multiple services to run on the same device without conflicts.
Why other options are wrong
A. To identify devices on the network
Devices on a network are identified using IP addresses, not port numbers. An IP address uniquely identifies a device, whereas a port number specifies which service on that device should handle the incoming data.
B. To encrypt data during transmission
Encryption is handled by protocols such as SSL/TLS or IPSec, not by port numbers. Port numbers only help in directing traffic to the appropriate application or service but do not play a role in securing the data.
D. To establish a connection
While port numbers are part of the connection process, the actual establishment of a connection is managed by protocols such as TCP (Transmission Control Protocol). The port number ensures that data is sent to the correct service, but it does not initiate or maintain the connection itself.
Which statement describes the confidentiality tenet of IT security?
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It involves keeping systems accessible for network users.
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It ensures continued access to systems and data.
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It safeguards against active attacks that corrupt or alter data
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It prevents unauthorized access to data or information
Explanation
Correct Answer:
It prevents unauthorized access to data or information.
Explanation:
Confidentiality in IT security refers to protecting sensitive data from unauthorized access or disclosure. This ensures that only authorized individuals or systems can view or use specific information. Availability is concerned with keeping systems accessible, while integrity focuses on preventing unauthorized alteration or corruption of data. Since confidentiality directly addresses restricting unauthorized access, the correct description is preventing unauthorized access to data or information.
A research institution needs a cloud computing solution that enables it to deploy and manage virtual machines, networks, and storage while leveraging the provider’s physical infrastructure.
Which cloud service model is being used?
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Software as a service (SaaS)
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Infrastructure as a service (IaaS)
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Private cloud
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Platform as a service (PaaS)
Explanation
Correct Answer:
Infrastructure as a service (IaaS)
Explanation:
Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines, storage, and networking. With IaaS, the provider supplies and manages the underlying physical infrastructure, while the customer has control over operating systems, applications, and configurations. SaaS delivers ready-to-use applications, PaaS provides a platform for application development, and a private cloud refers to deployment, not a service model. Since the scenario involves managing VMs, networks, and storage, the correct model is IaaS.
A person is troubleshooting a network issue and needs to bring down a network interface.
Which Linux command should be used?
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ifconfig
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nslookup
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dig
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ping
Explanation
Correct Answer:
ifconfig
Explanation:
The ifconfig command in Linux is used to configure and manage network interfaces. It can bring an interface up or down, assign IP addresses, and display interface status. To bring down a network interface, the command ifconfig [interface] down is used. By contrast, nslookup and dig are DNS query tools, while ping tests connectivity between devices. Therefore, ifconfig is the correct command for disabling a network interface during troubleshooting.
When setting up an office network, a technician needs a device that forwards data packets to other networks.
Which device is needed?
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Switch
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Server
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Router
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Modem
Explanation
Correct Answer:
Router
Explanation:
A router is the device responsible for forwarding data packets between different networks. Unlike a switch, which operates within a single local network, a router determines the best path for data to travel across multiple networks, ensuring connectivity between local and wide area networks. Servers provide resources and services, while modems convert digital signals to analog for transmission over telephone lines. Therefore, the correct device for forwarding data packets to other networks is the router.
Which of the following statements best describes key management
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Key management refers to the generation, storage, and protection of encryption keys.
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Key management refers to the generation, storage, and protection of server room keys
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Key management refers to the generation, storage, and protection of access control list keys.
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Key management refers to the generation, storage, and protection of card manufacturing keys.
Explanation
Correct Answer A. Key management refers to the generation, storage, and protection of encryption keys.
Explanation
Key management is a critical process in cryptography that ensures encryption keys are generated, stored, distributed, and protected securely. Effective key management prevents unauthorized access, key compromise, and ensures data security in encryption systems. It is an essential part of Public Key Infrastructure (PKI), securing communications, and protecting sensitive data.
Why other options are wrong
B. Key management refers to the generation, storage, and protection of server room keys.
This is incorrect because server room keys are physical security assets, not encryption keys. Key management in cybersecurity specifically relates to digital encryption keys, not physical locks and keys.
C. Key management refers to the generation, storage, and protection of access control list keys.
This is incorrect because Access Control Lists (ACLs) do not require encryption keys. ACLs define permissions for users or systems, but they do not use encryption keys for security.
D. Key management refers to the generation, storage, and protection of card manufacturing keys.
This is incorrect because key management is not specific to card manufacturing. While some industries use encryption keys in smart card security, key management applies broadly to all encryption applications, not just card manufacturing.
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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.