Which two actions are included in the role of a Domain Name System (DNS)? Choose 2 answers
Correct Answer: A,D
1.Translates human-friendly aliases into IP addresses: DNS serves as the "phone book" of the internet, converting user-friendly domain names (like www.example.com) into numerical IP addresses (such as 192.0.2.1) that computers and network devices use to locate one another on the internet12. 2.Stores IP addresses and aliases in a table on the server: DNS servers maintain records that map domain names to corresponding IP addresses. These records are stored in distributed databases across various DNS servers, ensuring efficient and reliable resolution of domain names1. References 1.GeeksforGeeks: What is Domain Name System (DNS)? 2.Cloudflare: What is DNS? How DNS works
Introduction-to-IT Exam Question 47
There are 30 questions on a final exam. The exam will be given in room 126 at 2:00 p.m., and students have one hour to complete it. What is the data-information-knowledge-wisdom DIKW pyramid component exemplified by the statement, "I have completed 25 questions, so I am almost done"?
Correct Answer: D
In the DIKW hierarchy, knowledge focuses on applying information to understand a situation and guide action. The exam facts such as 30 questions, room 126, 2:00 p.m., and one hour are information because they provide organized context. The statement, "I have completed 25 questions, so I am almost done," shows interpretation and application: it uses progress data, compares it to the total number of questions, and draws a practical conclusion about task completion. This is more than raw data, because the numbers are being used to reason about status. It is also not wisdom, because it does not involve an ethical or best-action judgment beyond the immediate conclusion. It represents knowledge because the student is applying understanding of the goal and current progress to evaluate where they stand and to manage time and effort. In Information Technology contexts, this is similar to using metrics to determine completion percentage in a project or workload tracking system. Therefore, the correct DIKW component here is knowledge.
Introduction-to-IT Exam Question 48
What does a modem do?
Correct Answer: C
A modem serves as the connection between the customer network and the internet service provider. In Information Technology networking, modem stands for modulator-demodulator. Traditionally, it converts outgoing digital data from a computer or router into a form suitable for transmission over the provider's communication medium and converts incoming signals back into digital data. Depending on the service type, this may involve cable, DSL, fiber, or cellular technologies, each using specific signaling methods. The modem typically terminates the ISP line and hands off connectivity to a router or directly to a computer. Option A describes routing or switching behavior rather than a modem function. Option B describes a server that offers hosted services. Option D describes a firewall, which protects a trusted network by filtering traffic from untrusted networks. Since the essential purpose of a modem is enabling communication between the customer premises equipment and the ISP network, the correct choice is that it serves as the connection between the customer network and the internet service provider. Therefore, the correct answer is option C.
Introduction-to-IT Exam Question 49
What type of a system requirement involves preventing unauthorized access to data?
Correct Answer: C
*Unauthorized access refers to gaining entry or access to a system, physical or electronic, without the permission of the owner or administrator. *Security is the type of system requirement that involves preventing unauthorized access to data. *Security measures include: oAuthentication: Verifying user identity. oEncryption: Protecting data from unauthorized viewing. oAccess controls: Limiting who can access specific resources. oFirewalls: Filtering network traffic. *Ensuring security helps safeguard sensitive information and maintain data integrity. References: 1.Unauthorized Access: Risks, Examples, and 6 Defensive Measures 2.How to Prevent Unauthorized Access: 10 Best Practices 3.Threat Picture: Unauthorized Access Prevention 4.PMC: Protecting Information with Cybersecurity 5.Cyberpedia: Unauthorized Data Access 1: Unauthorized Access: Risks, Examples, and 6 Defensive Measures 2: How to Prevent Unauthorized Access: 10 Best Practices 3: Threat Picture: Unauthorized Access Prevention 4: PMC: Protecting Information with Cybersecurity 5: Cyberpedia: Unauthorized Data Access
Introduction-to-IT Exam Question 50
Which computing term describes a collection of hardware and software components that work together to meet the needs of the user?
Correct Answer: C
The computing term that describes a collection of hardware and software components working together to meet the needs of the user is C. A computer system. A computer system consists of both physical hardware components (like the central processing unit, monitor, keyboard, etc.) and software components (such as operating systems, applications, and programs). References 1.WGU Introduction to IT (KSO1) Algorithm1.
