3DX5X - Volume 2 - UREs

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  • 1/124 Questions

    (207) The ability to move about without being tethered by wires technology is called

    • Mobility.
    • Ease of installations.
    • War driving.
    • Motion capture technology.
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3DX5X - Volume 2 - UREs - Quiz
About This Quiz

This quiz, titled '3DX5X - Volume 2 - UREs', assesses knowledge on the OSI model, focusing on network protocols and layers. It covers topics like physical specifications, data link sublayers, and the functionality of network routers and switches, essential for professionals in network engineering.

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  • 2. 

    (202) What topology defines the way in which devices communicate, and data is transmitted, throughout the network?

    • Physical

    • Logical

    • Star

    • Hybrid

    Correct Answer
    A. Logical
    Explanation
    Logical topology defines the way in which devices communicate and data is transmitted throughout the network. It describes the logical connections between devices, regardless of their physical locations. This includes the paths that data takes from one device to another and the rules and protocols that govern the communication process. It focuses on the logical arrangement of devices and how they are connected, rather than the physical layout of the network.

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  • 3. 

    (202) What topology combines two or more different physical topologies in a single network?

    • Bus

    • Ring

    • Star

    • Hybrid

    Correct Answer
    A. Hybrid
    Explanation
    A hybrid topology combines two or more different physical topologies in a single network. This means that the network can have elements of different topologies, such as a combination of bus, ring, and star topologies. This allows for greater flexibility and scalability in the network, as different topologies can be used in different parts of the network to meet specific requirements.

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  • 4. 

    (217) What directory is always identified by the slash symbol (/) and is in the "a" partition?

    • Root

    • User

    • Binary

    • Device

    Correct Answer
    A. Root
    Explanation
    The directory always identified by the slash symbol (/) and is in the "a" partition is the root directory. The root directory is the top-level directory in a file system hierarchy, and it contains all other directories and files in the system. It is represented by the slash symbol (/) and serves as the starting point for navigating through the file system.

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  • 5. 

    (234) Which condition permits non-essential networks to be taken offline and substituted with alternate methods of communication?

    • INFOCON 2

    • INFOCON 3

    • INFOCON 4

    • INFOCON 5

    Correct Answer
    A. INFOCON 2
    Explanation
    INFOCON 2 is the condition that permits non-essential networks to be taken offline and substituted with alternate methods of communication. This means that when the INFOCON level is at 2, the organization has determined that it is necessary to temporarily shut down non-essential networks and use other means of communication to ensure the security and continuity of essential operations. This could be due to a potential threat or vulnerability that requires a higher level of security measures.

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  • 6. 

    (203) Which network protocol has the Department of Defense chosen as its standard to govern the flow of information?

    • AppleTalk

    • NetBios Extended User Interface

    • Transport Control Protocol/Internet Protocol

    • Internetwork Packet Exchange/Sequenced Packet Exchange

    Correct Answer
    A. Transport Control Protocol/Internet Protocol
    Explanation
    The Department of Defense has chosen the Transport Control Protocol/Internet Protocol (TCP/IP) as its standard network protocol to govern the flow of information. TCP/IP is a set of communication protocols that allows computers to connect and communicate over the internet. It provides reliable and secure transmission of data, ensuring that information can be efficiently and accurately transmitted across networks. This choice by the Department of Defense highlights the widespread adoption and effectiveness of TCP/IP as the standard protocol for network communication.

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  • 7. 

    (215) What are two anti-virus programs that the Air Force uses?

    • Norton and Horton

    • Horton and McAfee

    • Norton and McAfee

    • McAfee and Lotus Pro

    Correct Answer
    A. Norton and McAfee
    Explanation
    The Air Force uses Norton and McAfee as their two anti-virus programs. These programs are commonly used in various organizations and are known for their effectiveness in protecting computer systems from viruses and malware. By using both Norton and McAfee, the Air Force ensures a comprehensive and robust defense against potential threats to their computer networks and data.

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  • 8. 

    (223) What concerns slowed the military's adoption of wireless network technology?

    • Speed and reliability

    • Security and reliability

    • Reliability and maintenance

    • Certification and interoperability

    Correct Answer
    A. Security and reliability
    Explanation
    The military's adoption of wireless network technology was slowed down due to concerns about both security and reliability. Security is a crucial aspect for the military, as they need to ensure that their wireless networks are not vulnerable to cyber attacks or unauthorized access. Reliability is also important, as the military relies on constant and uninterrupted communication. Any issues with the reliability of wireless networks could have serious consequences for their operations. Therefore, these concerns about security and reliability were significant factors that hindered the military's adoption of wireless network technology.

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  • 9. 

    (201) What is a formal set of rules and conventions that govern how computers exchange information over a network medium?

    • Specification

    • Standard

    • Etiquette

    • Protocol

    Correct Answer
    A. Protocol
    Explanation
    A protocol is a formal set of rules and conventions that govern how computers exchange information over a network medium. It defines the format, timing, sequencing, and error handling of data transmission between devices. Protocols ensure that different devices can communicate effectively and understand each other's messages. They provide a common language and structure for data exchange, enabling interoperability and reliable communication in computer networks.

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  • 10. 

    (202) What topology consists of devices connected to a common, shared cable?

    • Bus

    • Ring

    • Star

    • Hybrid

    Correct Answer
    A. Bus
    Explanation
    Bus topology consists of devices connected to a common, shared cable. In this type of network, all devices are connected to a single cable called the bus. The data is transmitted in both directions on the bus, and each device on the network receives the data. The advantage of bus topology is its simplicity and cost-effectiveness, as it requires less cabling compared to other topologies. However, if the bus cable fails, the entire network may be affected.

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  • 11. 

    (202) What topology consists of cable segments from each computer connected to a centralized component?

    • Bus

    • Ring

    • Star

    • Hybrid

    Correct Answer
    A. Star
    Explanation
    A star topology consists of cable segments from each computer connected to a centralized component, usually a switch or hub. In this configuration, all the devices are connected to a central point, which allows for easy management and troubleshooting. Each device has its own dedicated connection to the central component, providing better performance and reliability compared to other topologies.

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  • 12. 

    (204) What type of network connects networks that are typically separated by geographical distances between cities, states, countries, or around the world?

    • Local Area Network

    • Wide Area Network

    • Virtual Private Network

    • Metropolitan Area Network

    Correct Answer
    A. Wide Area Network
    Explanation
    A Wide Area Network (WAN) is a type of network that connects networks that are typically separated by geographical distances between cities, states, countries, or around the world. Unlike Local Area Networks (LANs) that connect devices within a limited area, WANs provide connectivity over larger areas and are commonly used by organizations to connect their branches or offices located in different geographical locations. Virtual Private Networks (VPNs) provide secure access to a private network over a public network, while Metropolitan Area Networks (MANs) connect networks within a specific geographic area such as a city.

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  • 13. 

    (207) Who is an authorized client that may unknowingly or maliciously help outside parties gain access to a network?

    • Auditor

    • Employee

    • War Driver

    • Hacker

    Correct Answer
    A. Employee
    Explanation
    An employee is an authorized client who may unknowingly or maliciously help outside parties gain access to a network. As an authorized user, an employee has legitimate access to the network and its resources. However, due to lack of awareness, negligence, or malicious intent, an employee can inadvertently or intentionally assist external parties in gaining unauthorized access to the network. This can be done through actions such as sharing passwords, falling victim to phishing attacks, or intentionally providing sensitive information to unauthorized individuals.

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  • 14. 

    (215) The path between the operating system and virtually all hardware not on the computer's motherboard goes through a special program called a

    • Director.

    • Deliver.

    • Driver.

    • Sender.

    Correct Answer
    A. Driver.
    Explanation
    The path between the operating system and hardware devices that are not on the computer's motherboard is established by a special program called a driver. A driver acts as a bridge between the operating system and the hardware, allowing the operating system to communicate and control the hardware effectively. It provides the necessary instructions and protocols for the hardware to function correctly and enables the operating system to access and utilize the hardware's capabilities.

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  • 15. 

    (201) The Institute of Electrical and Electronics Engineers divide the Open System Interconnect Data Link Layers into what two sublayers?

    • High Level Data Link Control and Synchronous Data Link Control

    • Logical Link Control and Media Access Control

    • Distance Vector and Link State

    • RS-232 and RS-530

    Correct Answer
    A. Logical Link Control and Media Access Control
    Explanation
    The correct answer is Logical Link Control and Media Access Control. The Open System Interconnect (OSI) Data Link Layer is divided into these two sublayers. Logical Link Control (LLC) is responsible for error control and flow control, providing a reliable link between two devices. Media Access Control (MAC) is responsible for controlling access to the physical media, such as Ethernet or Wi-Fi, and handles addressing and data transmission. These two sublayers work together to ensure reliable and efficient communication between devices in a network.

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  • 16. 

    (203) What Transmission Control Protocol/Internet Protocol network layer protocol provides the IP address for a device that knows its own MAC address?

    • Internet Protocol

    • Address Resolution Protocol

    • Reverse Address Resolution Protocol

    • Internet Control Message Protocol

    Correct Answer
    A. Reverse Address Resolution Protocol
    Explanation
    The Reverse Address Resolution Protocol (RARP) is a network layer protocol that provides the IP address for a device that knows its own MAC address. RARP allows a device to send its MAC address to a RARP server and request its corresponding IP address. This is useful in situations where a device needs to obtain its IP address dynamically without manual configuration.

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  • 17. 

    (203) What Transmission Control Protocol/Internet Protocol network layer protocol provides messaging that can help with troubleshooting?

    • Internet Protocol

    • Address Resolution Protocol

    • Reverse Address Resolution Protocol

    • Internet Control Message Protocol

    Correct Answer
    A. Internet Control Message Protocol
    Explanation
    The Internet Control Message Protocol (ICMP) is a network layer protocol that provides messaging capabilities to help with troubleshooting. ICMP is used to send error messages and operational information about network conditions. It allows devices to communicate information about network connectivity, congestion, and errors, which can be useful for network administrators to diagnose and resolve network issues.

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  • 18. 

    (204) What type of network makes use of tunneling and security protocols to enables a group of two or more computer systems to communicate over the public Internet?

    • Local Area Network

    • Wide Area Network

    • Virtual Private Network

    • Metropolitan Area Network

    Correct Answer
    A. Virtual Private Network
    Explanation
    A Virtual Private Network (VPN) makes use of tunneling and security protocols to enable a group of two or more computer systems to communicate over the public Internet. It creates a secure and encrypted connection between the computers, allowing them to send and receive data as if they were on a private network. This ensures that the communication remains private and protected from potential eavesdropping or unauthorized access. VPNs are commonly used by organizations to provide secure remote access for their employees or to connect multiple branch offices together.

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  • 19. 

    (205) Using a range of 1-136 in the first octet of an IPv4 address, what class does it belong to?

    • Class A

    • Class B

    • Class C

    • Class D

    Correct Answer
    A. Class A
    Explanation
    An IPv4 address is divided into different classes based on the range of values in the first octet. Class A addresses have a range of 1-126 in the first octet, so an address in the range of 1-136 would belong to Class A.

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  • 20. 

    (206) What Unicast address scope is designed to be private, internally routable addresses that do not route outside the site?

    • Site-local

    • Link-local

    • Aggregatable Local

    • Aggregatable Global

    Correct Answer
    A. Site-local
    Explanation
    Site-local addresses are designed to be private, internally routable addresses that do not route outside the site. These addresses are used within a specific site or organization and are not meant to be globally unique. They provide a way for devices within the same site to communicate with each other without the need for global routing. Site-local addresses were deprecated in favor of Unique Local Addresses (ULA) in IPv6.

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  • 21. 

    (207) Which landline transmission medium is the primary carrier of voice communications?

    • Twisted pair cable

    • Fiber optic cable

    • Coaxial cable

    • Twinax cable

    Correct Answer
    A. Twisted pair cable
    Explanation
    Twisted pair cable is the primary carrier of voice communications because it is a reliable and cost-effective transmission medium. It consists of two insulated copper wires twisted together, which helps to reduce electromagnetic interference and crosstalk. This makes it ideal for carrying voice signals over long distances without significant degradation in quality. Additionally, twisted pair cable is widely available and easy to install, making it the preferred choice for telephone systems and other voice communication applications.

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  • 22. 

    (207) What organization developed several wireless standards to meet the demands of security, speed, and flexibility of today's wireless networks?

    • Institute of Electrical Electronics Engineers

    • International Organization for Standardization

    • Internet assigned numbers authority

    • National Science Foundation network

    Correct Answer
    A. Institute of Electrical Electronics Engineers
    Explanation
    The Institute of Electrical Electronics Engineers (IEEE) developed several wireless standards to meet the demands of security, speed, and flexibility of today's wireless networks. These standards include IEEE 802.11, also known as Wi-Fi, which is widely used for wireless communication. The IEEE is a professional association that focuses on advancing technology and innovation in various fields, including wireless networking. Their standards ensure interoperability and compatibility among different wireless devices, allowing for seamless communication and efficient network performance.

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  • 23. 

    (213) The classification of a fill device is

    • Classified when taken out of a safe.

    • Classified as SECRET when the key has been unloaded.

    • Unclassified when put back in the safe after a key has been loaded into it.

    • Classified as soon as a key is loaded, and holds the classification of the loaded key.

    Correct Answer
    A. Classified as soon as a key is loaded, and holds the classification of the loaded key.
    Explanation
    The correct answer is "classified as soon as a key is loaded, and holds the classification of the loaded key." This means that when a key is loaded into the fill device, it becomes classified and takes on the classification level of the loaded key. The classification status of the fill device changes as soon as the key is loaded, and it will maintain that classification until the key is unloaded.

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  • 24. 

    (201) What Open System Interconnect layer is closest to the end user?

    • Application

    • Session

    • Presentation

    • Transport

    Correct Answer
    A. Application
    Explanation
    The Application layer is closest to the end user in the Open System Interconnect (OSI) model. This layer is responsible for providing services and interfaces for user applications to interact with the network. It includes protocols such as HTTP, FTP, and SMTP, which are used by applications to communicate over the network. Therefore, the Application layer directly interacts with the end user and is the closest layer to them in the OSI model.

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  • 25. 

    (203) What application within Transmission Control Protocol/Internet Protocol is used to send and receive files via TCP?

    • File Transfer Protocol

    • Trivial File Transfer Protocol

    • Simple Mail Transfer Protocol

    • HyperText Transfer Protocol

    Correct Answer
    A. File Transfer Protocol
    Explanation
    The correct answer is File Transfer Protocol (FTP). FTP is a standard network protocol used to transfer files from one host to another over a TCP-based network, such as the internet. It provides a simple and reliable way to send and receive files, allowing users to upload, download, and manage files on remote servers. FTP operates on the application layer of the TCP/IP protocol suite and uses a client-server architecture, where the client initiates the connection and the server responds to requests.

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  • 26. 

    (206) What notation is expressed in zero compression for IPv6?

    • 1234:1234:0:0:1234:0:0:1234

    • 10AB::3:0:1234:5678

    • 255.255.255.255

    • 127.0.0.1

    Correct Answer
    A. 10AB::3:0:1234:5678
    Explanation
    The given correct answer, "10AB::3:0:1234:5678," represents zero compression notation for IPv6. In IPv6, zero compression allows consecutive groups of zeros to be represented by a double colon "::". This notation helps to shorten the IPv6 address and make it more readable. In the given answer, "::" is used to represent consecutive groups of zeros, resulting in a shorter representation of the address.

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  • 27. 

    (215) Applications are software programs designed to perform what type of tasks?

    • Specific

    • General

    • Special

    • Broad

    Correct Answer
    A. Specific
    Explanation
    Applications are software programs that are designed to perform specific tasks. Unlike general software programs, which have a wide range of functionalities, applications are focused on performing specific functions or tasks. They are designed to meet the specific needs and requirements of users, whether it is for productivity, entertainment, communication, or any other specific purpose. Therefore, the correct answer is "specific."

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  • 28. 

    (217) What was the first disk operating system developed to operate on a wide range of computer systems?

    • C-Plus

    • UNIX

    • Fortran

    • Windows

    Correct Answer
    A. UNIX
    Explanation
    UNIX was the first disk operating system developed to operate on a wide range of computer systems. It was designed to be portable and flexible, allowing it to run on different hardware architectures. UNIX introduced the concept of a hierarchical file system, multi-user capabilities, and a command-line interface, making it a groundbreaking operating system that influenced the development of many other operating systems.

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  • 29. 

    (201) What layer of the Open System Interconnect model defines the electrical, mechanical, procedural, and functional specifications for links between communicating network systems?

    • Physical

    • Data Link

    • Network

    • Transport

    Correct Answer
    A. Physical
    Explanation
    The Physical layer of the Open System Interconnect (OSI) model is responsible for defining the electrical, mechanical, procedural, and functional specifications for links between communicating network systems. It deals with the physical aspects of communication, such as the transmission of bits over a physical medium, the types of cables and connectors used, and the voltage levels required for communication. This layer ensures that the data is transmitted reliably and accurately between devices.

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  • 30. 

    (205) What IPv4 reserved address is used for loop back?

    • 0.0.0.0

    • 127.0.0.1

    • 207.55.157.255

    • 255.255.255.255

    Correct Answer
    A. 127.0.0.1
    Explanation
    The IPv4 reserved address used for loop back is 127.0.0.1. This address is commonly referred to as the loopback address and is used to test network connectivity on a local machine. When a packet is sent to this address, it is immediately looped back to the same machine without being transmitted over the network. This allows for testing and troubleshooting of network applications without the need for an actual network connection.

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  • 31. 

    (207) Which of the following is not one of the four security threats to Wireless Local Area Network?

    • Rogue Access Points

    • Direct Connections

    • War Drivers

    • Hackers

    Correct Answer
    A. Direct Connections
    Explanation
    Direct Connections is not one of the four security threats to Wireless Local Area Network. Rogue Access Points, War Drivers, and Hackers are all potential security threats to a WLAN. Rogue Access Points refer to unauthorized access points that are connected to a network without proper authorization. War Drivers are individuals who drive around searching for wireless networks to exploit. Hackers are individuals who attempt to gain unauthorized access to a network or system. Direct Connections, on the other hand, typically refer to wired connections and do not pose a direct security threat to a WLAN.

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  • 32. 

    (211) What is the method called when the entire frame is received and placed into the buffer, an error check is performed, and the frame is sent to the proper port for delivery?

    • Store-and-forward

    • Cross-over

    • Fragment-free

    • Adaptive

    Correct Answer
    A. Store-and-forward
    Explanation
    Store-and-forward is the method where the entire frame is received and stored in the buffer before being sent to the proper port for delivery. In this process, an error check is performed to ensure the integrity of the frame before forwarding it. This method is commonly used in networking to ensure reliable and accurate transmission of data packets.

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  • 33. 

    (201) At what Open System Interconnect layer do routers operate?

    • Network

    • Physical

    • Data Link

    • Transport

    Correct Answer
    A. Network
    Explanation
    Routers operate at the Network layer of the Open System Interconnect (OSI) model. The Network layer is responsible for routing packets across different networks, determining the best path for data transmission, and addressing and forwarding data packets. Routers use IP addresses to make decisions on how to direct traffic between different networks. They analyze the destination IP address in the packet header and make forwarding decisions based on routing tables. Therefore, routers play a crucial role in connecting different networks and enabling communication between them.

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  • 34. 

    (205) What is a mechanism that allows a network device to divide an IP address into a network and host number?

    • Subnet mask

    • Broadcast

    • Multicast

    • Subnet

    Correct Answer
    A. Subnet mask
    Explanation
    A subnet mask is a mechanism that allows a network device to divide an IP address into a network and host number. It is a 32-bit number that is used to determine which part of the IP address represents the network and which part represents the host. The subnet mask is applied to the IP address bitwise, where the network bits are set to 1 and the host bits are set to 0. By using a subnet mask, a network device can determine which devices are on the same network and can communicate with each other directly.

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  • 35. 

    (207) The computing part of the computer is the central processing unit, also called the 

    • Control unit.

    • Minicomputer.

    • Microprocessor.

    • Arithmetic logic unit.

    Correct Answer
    A. Microprocessor.
    Explanation
    The computing part of a computer refers to the component responsible for executing instructions and performing calculations. The central processing unit (CPU) is the primary computing component, which consists of several subunits including the control unit, arithmetic logic unit (ALU), and the microprocessor. Among these options, the microprocessor is the correct answer as it is a small chip that contains the ALU, control unit, and other necessary components for processing data and executing instructions.

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  • 36. 

    (207) Which of the following is not one of the three advantages to using wireless technology?

    • Ease of installation

    • Lower cost

    • Safety

    • Mobility

    Correct Answer
    A. Safety
    Explanation
    Wireless technology offers several advantages, including ease of installation, lower cost, and mobility. However, safety is not one of the advantages. While wireless technology provides convenience and flexibility, it also poses potential risks such as security vulnerabilities, interference, and health concerns related to electromagnetic radiation. Therefore, safety cannot be considered as an advantage of using wireless technology.

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  • 37. 

    (212) What do routing algorithms initialize and maintain to aid the process of path determination?

    • Routing times

    • Routing tables

    • Longest routes

    • Shortest routes

    Correct Answer
    A. Routing tables
    Explanation
    Routing algorithms initialize and maintain routing tables to aid the process of path determination. These tables contain information about the network topology, including the available routes, their costs, and other relevant metrics. By continuously updating and referencing these tables, routing algorithms can make informed decisions about the best path for data packets to travel from the source to the destination in a network. Routing tables play a crucial role in efficient and effective routing, ensuring that data is delivered accurately and quickly.

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  • 38. 

    (235) An accreditation decision which allows a system to operate in an environment for which it was originally intended is known as

    • A full accreditation.

    • A type accreditation.

    • A major accreditation.

    • An interim accreditation.

    Correct Answer
    A. A full accreditation.
    Explanation
    An accreditation decision which allows a system to operate in the environment it was originally intended for is referred to as a full accreditation. This means that the system has met all the necessary requirements and standards to function effectively and securely in its intended environment. It signifies that the system has successfully undergone a comprehensive evaluation and has been deemed suitable for its intended purpose.

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  • 39. 

    (207) An optical communications system is comprised of a 

    • Transmitter, cable, and receiver.

    • Transmitter, cable, and logic analyzer.

    • Transmitter, transmission medium, and logic analyzer.

    • Transmitter, transmission medium, and protocol analyzer.

    Correct Answer
    A. Transmitter, cable, and receiver.
    Explanation
    The correct answer is transmitter, cable, and receiver. In an optical communications system, the transmitter is responsible for converting electrical signals into optical signals, which are then transmitted through a cable made of optical fibers. The receiver at the other end of the cable receives the optical signals and converts them back into electrical signals. The cable acts as the transmission medium, allowing the optical signals to travel from the transmitter to the receiver. A logic analyzer or protocol analyzer is not typically part of an optical communications system.

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  • 40. 

    (210) What rule establishes the percent of data that should be local to a segment and the percentage of data that should be destined to traverse a bridge to the other segment?

    • 90/10 rule

    • 80/20 rule

    • 70/30 rule

    • 60/40 rule

    Correct Answer
    A. 80/20 rule
    Explanation
    The 80/20 rule establishes that 80% of the data should be local to a segment, while 20% of the data should be destined to traverse a bridge to the other segment. This rule suggests that the majority of the data should stay within a segment, reducing the need for unnecessary network traffic and improving overall efficiency.

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  • 41. 

    (205) Instead of using binary, how are IPv4 addresses expressed to be more user-friendly?

    • Colon Hexadecimal Format

    • Dotted Decimal Notation

    • Hexadecimal

    • Octal

    Correct Answer
    A. Dotted Decimal Notation
    Explanation
    IPv4 addresses are expressed in dotted decimal notation to make them more user-friendly. In this format, the 32-bit binary IP address is divided into four 8-bit sections, each represented by a decimal number ranging from 0 to 255. These sections are separated by dots, making it easier for users to read and understand the IP address. This format is widely used in networking and allows for easy identification and communication between devices on the internet.

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  • 42. 

    (205) What is the default classful subnet mask on class B networks?

    • 255.255.0.0

    • 255.255.240.0

    • 255.255.255.0

    • 255.255.255.224

    Correct Answer
    A. 255.255.0.0
    Explanation
    The default classful subnet mask for class B networks is 255.255.0.0. This subnet mask allows for a maximum of 65,534 hosts per network. Class B networks have a range of IP addresses from 128.0.0.0 to 191.255.255.255. The first two octets of the subnet mask, 255.255, indicate that the network portion of the IP address is 16 bits long, while the remaining two octets, 0.0, indicate that the host portion is 16 bits long. This subnet mask provides a balance between the number of networks and the number of hosts per network.

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  • 43. 

    (207) What is the type of memory that retains data after power is removed or lost?

    • Volatile

    • Nonvolatile

    • Secured

    • Unsecured

    Correct Answer
    A. Nonvolatile
    Explanation
    Nonvolatile memory refers to a type of memory that retains data even after the power is removed or lost. Unlike volatile memory, which loses its stored information when power is cut off, nonvolatile memory ensures that the data remains intact. This type of memory is commonly used in devices such as hard drives, solid-state drives, flash memory, and ROM (Read-Only Memory) chips, where it is crucial to preserve data even in the absence of power.

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  • 44. 

    (212) Dynamic routing automatically calculates the best path between how many nodes?

    • 2

    • 3

    • 4

    • 5

    Correct Answer
    A. 2
    Explanation
    Dynamic routing automatically calculates the best path between two nodes. It analyzes the network topology and traffic conditions to determine the most efficient route for data packets to reach their destination. By continuously updating routing tables, dynamic routing protocols ensure that data is forwarded along the most optimal path, taking into account factors such as link availability, congestion, and network failures. Therefore, the correct answer is 2.

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  • 45. 

    (205) What IPv4 class address is used for networks with about 250 nodes?

    • Class C

    • Class D

    • Class E

    • Class F

    Correct Answer
    A. Class C
    Explanation
    Class C is the correct answer because it is specifically designed for networks with approximately 250 nodes. Class C addresses have a range of 192.0.0.0 to 223.255.255.255, and they provide a large number of network addresses, allowing for up to 254 hosts per network. This makes Class C suitable for small to medium-sized networks, such as home networks or small businesses, which typically have around 250 nodes. Class D, Class E, and Class F are not appropriate for this scenario as they have different purposes or reserved for special use.

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  • 46. 

    (202) What topology defines the layout of a network's devices and media?

    • Physical

    • Logical

    • Star

    • Hybrid

    Correct Answer
    A. Physical
    Explanation
    Physical topology refers to the physical arrangement of devices and media in a network. It defines how devices are connected to each other and how data flows through the network. This includes the layout of cables, connectors, and other physical components. Logical topology, on the other hand, refers to how data is transmitted in a network, regardless of the physical layout. The star topology is a specific type of physical topology where all devices are connected to a central hub or switch. A hybrid topology is a combination of different physical topologies.

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  • 47. 

    (203) What Transmission Control Protocol/Internet Protocol network layer protocol provides the service of matching a known IP address for a destination device to a Media Access Control address?

    • Internet Protocol

    • Address Resolution Protocol

    • Reverse Address Resolution Protocol

    • Internet Control Message Protocol

    Correct Answer
    A. Address Resolution Protocol
    Explanation
    The Address Resolution Protocol (ARP) is the correct answer because it is responsible for matching a known IP address for a destination device to a Media Access Control (MAC) address. ARP is used to find the MAC address of a device on the same network when only the IP address is known. It sends out an ARP request, and the device with the matching IP address responds with its MAC address, allowing communication to occur at the data link layer.

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  • 48. 

    (207) What two main components make up the central processing unit?

    • Control unit and read-only memory.

    • Control unit and arithmetic logic unit.

    • Arithmetic logic unit and read-only memory.

    • Arithmetic logic unit and random access memory.

    Correct Answer
    A. Control unit and arithmetic logic unit.
    Explanation
    The central processing unit (CPU) is made up of two main components: the control unit and the arithmetic logic unit. The control unit is responsible for coordinating and controlling the operations of the CPU, while the arithmetic logic unit performs mathematical and logical operations. These two components work together to execute instructions and perform calculations in a computer system.

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  • 49. 

    (209) What do you apply across Liquid Crystal Display material to change the alignment and light polarizing property?

    • Current

    • Voltage

    • Resistance

    • Inductance

    Correct Answer
    A. Voltage
    Explanation
    Voltage is applied across Liquid Crystal Display (LCD) material to change the alignment and light polarizing property. By applying a voltage, the liquid crystals in the display can be reoriented, which alters the alignment of the molecules and changes the polarization of light passing through the material. This allows for the control of light transmission and enables the display to produce different colors and shades.

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Quiz Review Timeline (Updated): Mar 22, 2023 +

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 19, 2012
    Quiz Created by
    Becky11

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