Open System Interconnect Layer Quiz 3dx5xn Vol. 2

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  • 1/124 Questions

    (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
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OSI Model Quizzes & Trivia
About This Quiz

This OSI Model quiz, part of the 3DX5XN series, assesses knowledge on layers defining physical specifications, sublayer divisions, device operations, and data handling techniques like compression and encryption. Ideal for learners aiming to understand network interactions and protocol standards.

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  • 2. 

    (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
    A driver is a special program that acts as a bridge between the operating system and hardware devices that are not located on the computer's motherboard. It allows the operating system to communicate with and control these external hardware devices effectively. Without a driver, the operating system would not be able to interact with or utilize the functionalities of these hardware devices. Therefore, a driver is necessary to establish a connection and facilitate communication between the operating system and external hardware.

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  • 3. 

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

    • Mobility

    • Ease of installations

    • War driving

    • Motion capture technology

    Correct Answer
    A. Mobility
    Explanation
    The correct answer is mobility because wireless technology allows devices to move freely without being connected by wires. This enables users to have flexibility and freedom of movement while still being able to access and use the technology.

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  • 4. 

    (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 a local area network (LAN), which connects devices within a limited area such as a building or campus, a WAN allows for long-distance communication and connects multiple LANs together. A WAN often utilizes public or private telecommunications infrastructure to transmit data between different locations, making it suitable for organizations with multiple branches or offices spread across different regions.

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  • 5. 

    (205) Using a range of 1–126 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
    IPv4 addresses are divided into different classes based on the range of the first octet. Class A addresses have a range of 1-126 in the first octet. Therefore, an IPv4 address with a range of 1-126 in the first octet belongs to Class A.

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  • 6. 

    (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 that a fill device is classified as soon as a key is loaded, and it holds the classification of the loaded key. This means that the classification of the fill device is determined by the classification of the key that is loaded into it. Once the key is loaded, the fill device takes on the same classification as the key. This ensures that the fill device and the key have the same level of classification and that sensitive information is appropriately protected.

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  • 7. 

    (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 designed to perform specific tasks. Unlike general software programs, which are designed to perform a wide range of tasks, applications are created with a specific purpose in mind. They are tailored to meet the needs of users in a particular domain or industry. This specificity allows applications to be more efficient and effective in performing their intended tasks, as they are designed with a focused set of features and functionalities.

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  • 8. 

    (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.

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  • 9. 

    (225) While you are using the Red Switch, what feature lets you know that you have dialed the correct number at the proper level of security?

    • Recorded voice message

    • Punched computer cards

    • Liquid crystal display

    • Punched paper tape

    Correct Answer
    A. Liquid crystal display
    Explanation
    The liquid crystal display is a feature that lets you know that you have dialed the correct number at the proper level of security while using the Red Switch. The display provides visual feedback, indicating that the correct number has been dialed and that the desired level of security has been reached. This ensures that the communication is being conducted securely and accurately.

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  • 10. 

    (233) What best describes an unintended signals or noise appearing external to a piece of communications equipment?

    • Emulation

    • Emanation

    • Signature

    • Salutation

    Correct Answer
    A. Emanation
    Explanation
    Emanation best describes unintended signals or noise appearing external to a piece of communications equipment. Emanation refers to the unintentional release of electromagnetic or acoustic signals from electronic devices, which can potentially be intercepted and exploited by unauthorized individuals. This can lead to security breaches and compromise the confidentiality of sensitive information.

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  • 11. 

    (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) is a type of network that utilizes tunneling and security protocols to enable communication between two or more computer systems over the public Internet. It creates a secure and encrypted connection, allowing users to access resources on a private network remotely. VPNs are commonly used by organizations to ensure secure communication and data transfer between remote locations or employees working from home.

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  • 12. 

    (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 can potentially misuse their privileges to assist external individuals or groups in gaining unauthorized access. This could be done either unintentionally, such as through negligence or lack of awareness of security protocols, or intentionally, as an insider threat or through collusion with external attackers. Therefore, employees pose a significant risk to network security if their actions are not properly monitored and controlled.

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  • 13. 

    (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. An error check is then performed to ensure the integrity of the frame. Finally, the frame is sent to the appropriate port for delivery. This method ensures that the entire frame is received before it is forwarded, reducing the chances of errors or data loss during transmission.

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  • 14. 

    (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
    A full accreditation refers to a decision that allows a system to operate in the environment it was originally intended for. This means that the system has met all the necessary requirements and standards to function effectively in its designated setting. It signifies that the system has successfully undergone a comprehensive evaluation and has been deemed suitable for its intended purpose.

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  • 15. 

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

    • Bus

    • Ring

    • Star

    • Hybrid

    Correct Answer
    A. Star
    Explanation
    In a star topology, each computer is connected to a centralized component, such as a switch or hub, through individual cable segments. This centralized component acts as a central point of communication, allowing data to be transmitted between computers. This topology is commonly used in Ethernet networks and provides better performance and reliability compared to bus or ring topologies, as a single point of failure does not affect the entire network.

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  • 16. 

    (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 is the type of memory that retains data even after power is removed or lost. Unlike volatile memory, which loses its data when power is disconnected, nonvolatile memory stores information permanently. This type of memory is commonly used in devices such as hard drives, solid-state drives, and flash memory. It allows for persistent storage of data, ensuring that information is not lost even during power outages or system shutdowns.

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  • 17. 

    (207) Which of the following is not one 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 set up by individuals without proper authorization. War Drivers are individuals who drive around looking for unsecured wireless networks to exploit. Hackers are individuals who attempt to gain unauthorized access to a network. However, Direct Connections does not pose a specific security threat to WLANs as it refers to a direct physical connection to a device, rather than a wireless connection.

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  • 18. 

    (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 developed in the 1960s and became popular due to its portability and compatibility across different hardware platforms. UNIX introduced many innovative features, such as a hierarchical file system and a command-line interface, which made it highly influential in the development of modern operating systems. Its flexibility and ability to run on various computer systems made it a groundbreaking advancement in the field of operating systems.

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  • 19. 

    (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 by concerns related to security and reliability. The military requires highly secure and reliable communication systems to safeguard sensitive information and ensure effective operations. Wireless networks are vulnerable to security breaches and interference, which raised concerns about the confidentiality and integrity of military communications. Additionally, reliability issues such as signal strength, coverage, and potential disruptions further hindered the adoption of wireless technology in military settings.

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  • 20. 

    (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 suite of protocols that enables communication between devices on the internet. It provides reliable and secure transmission of data packets, ensuring that information is delivered accurately and efficiently across networks. TCP/IP has become the standard protocol for internet communication and is widely used in various industries, including government and military organizations.

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  • 21. 

    (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, meaning it stays within that segment, while 20% of the data should be destined to traverse a bridge to the other segment. This rule helps in determining the distribution of data between segments and ensures efficient data management and communication between segments.

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  • 22. 

    (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 that is 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 (/) in Unix-like operating systems.

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  • 23. 

    (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 refers to the way in which devices communicate and data is transmitted in a network. It defines the logical connections between devices, regardless of their physical location. This includes the paths that data takes from one device to another, the protocols used for communication, and the logical structure of the network. Unlike physical topology, which focuses on the physical layout of devices and cables, logical topology is concerned with the conceptual layout of the network. It helps in understanding how devices are interconnected and how data flows within the network.

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  • 24. 

    (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 different sections of the network may be connected using different types of topologies such as bus, ring, or star. This allows for more flexibility and scalability in the network design, as different sections can be configured in the most suitable way for their specific requirements.

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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
    File Transfer Protocol (FTP) is the correct answer because it is the application within TCP/IP that is specifically designed for sending and receiving files. FTP allows users to transfer files between a client and a server over a network. It provides a set of commands that allow users to navigate through directories, upload and download files, and manage file permissions. FTP operates on TCP, which ensures reliable and ordered delivery of data packets.

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  • 26. 

    (231) Final reports of a communication security incident are due

    • 10 days after the initial report is dated

    • 20 days after the initial report is signed

    • 30 days after the initial report is issued

    • 40 days after the initial report is approved

    Correct Answer
    A. 30 days after the initial report is issued
    Explanation
    The correct answer is 30 days after the initial report is issued. This means that the final reports of a communication security incident should be submitted 30 days after the initial report is officially released or made available to relevant parties. This allows sufficient time for investigation, analysis, and compilation of the necessary information and findings before the final report is due.

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  • 27. 

    (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. Routing tables contain information about the network topology, including the available paths, their costs, and other relevant metrics. By continuously updating and referencing these tables, routing algorithms can determine the most efficient routes for data packets to travel from a source to a destination in a computer network.

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  • 28. 

    (214) Analog modems are used over the voice band range of

    • 10 Hz to 20 MHz

    • 20 Hz to 20 kHz

    • 30 Hz to 40 MHz

    • 40 Hz to 40 kHz

    Correct Answer
    A. 20 Hz to 20 kHz
    Explanation
    Analog modems are used over the voice band range of 20 Hz to 20 kHz. This range is within the audible frequency range for humans, which is why it is suitable for transmitting voice signals. Analog modems convert digital signals into analog signals that can be transmitted over telephone lines, and the voice band range allows for the transmission of voice signals without significant loss of quality. Frequencies outside of this range may not be properly transmitted or may be distorted, which is why the voice band range is specifically used for analog modems.

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  • 29. 

    (231) An uninvestigated or unevaluated occurrence that potentially jeopardizes the security of COMSEC material or the secure transmission of government information is best described as a COMSEC

    • Insecurity

    • Deviation

    • Incident

    • Report

    Correct Answer
    A. Incident
    Explanation
    An uninvestigated or unevaluated occurrence that potentially jeopardizes the security of COMSEC material or the secure transmission of government information is best described as a COMSEC incident.

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  • 30. 

    (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 is known as the microprocessor. The microprocessor is responsible for executing instructions and performing calculations. It is often referred to as the "brain" of the computer as it controls and coordinates all the activities of the computer system. The control unit, arithmetic logic unit, and minicomputer are all components that are part of the overall computer system, but the microprocessor specifically refers to the central processing unit responsible for processing data and executing instructions.

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  • 31. 

    (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 widely used and cost-effective transmission medium. It consists of two insulated copper wires twisted together, which helps to reduce interference and improve signal quality. Twisted pair cable is capable of carrying analog voice signals efficiently over short to medium distances, making it ideal for telephone systems and voice communication applications. Fiber optic cable, coaxial cable, and twinax cable are also used for transmission, but they are more commonly used for data and video transmission rather than voice communications.

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  • 32. 

    (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 these advantages. While wireless technology can provide convenience and flexibility, it also comes with potential security risks and vulnerabilities. Therefore, safety is not considered a primary advantage of using wireless technology.

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  • 33. 

    (212) Which of these is an example of an Exterior Gateway Protocol?

    • Open Shortest Path First

    • Border Gateway Protocol

    • Routing Information Protocol

    • Enhanced Gateway Routing Protocol

    Correct Answer
    A. Border Gateway Protocol
    Explanation
    Border Gateway Protocol (BGP) is an example of an Exterior Gateway Protocol (EGP). EGP is a routing protocol used to exchange routing information between different autonomous systems (AS) in a network. BGP is specifically designed for this purpose and is widely used on the internet to exchange routing information between different internet service providers (ISPs) and ASes. BGP allows routers in different ASes to communicate and exchange information about the best paths to reach different networks. It is responsible for determining the most efficient routes and ensuring the proper flow of traffic between different ASes.

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  • 34. 

    (217) What is the name of the standard all-purpose shell most commonly used?

    • Restricted shell

    • Bourne shell

    • Korn shell

    • C shell

    Correct Answer
    A. Bourne shell
    Explanation
    The Bourne shell is the standard all-purpose shell that is most commonly used. It was developed by Stephen Bourne and is the default shell for most Unix-like operating systems. The Bourne shell provides a command-line interface for users to interact with the operating system and execute commands. It is known for its simplicity and efficiency, making it a popular choice among users and system administrators.

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  • 35. 

    (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 correct answer is Physical. The Physical layer of the OSI model is responsible for defining the electrical, mechanical, procedural, and functional specifications for links between communicating network systems. It deals with the physical transmission of data and includes specifications for cables, connectors, and other hardware components.

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  • 36. 

    (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 address is divided into four octets, each separated by a dot. Each octet represents a decimal number ranging from 0 to 255. This format is easier for users to read and understand compared to binary or hexadecimal representation.

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  • 37. 

    (215) The core operating-system function is the management of the computer system which resides with the

    • Shell

    • Kernel

    • Device manager

    • Processor manager

    Correct Answer
    A. Kernel
    Explanation
    The correct answer is "kernel". The kernel is the core operating-system function that manages the computer system. It is responsible for managing hardware resources, providing essential services to other parts of the operating system, and facilitating communication between software and hardware components. The kernel acts as a bridge between applications and the actual hardware, ensuring that the system runs smoothly and efficiently. It handles tasks such as memory management, process scheduling, and device drivers. Without the kernel, the operating system would not be able to function properly.

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  • 38. 

    (227) The Global Positioning System program is responsible for maintaining GPS time to within how many seconds of universal time code?

    • 2 microseconds

    • 2 seconds

    • 1 microsecond

    • 1 second

    Correct Answer
    A. 1 microsecond
    Explanation
    The Global Positioning System program is responsible for maintaining GPS time to within 1 microsecond of universal time code. This level of accuracy ensures that GPS devices can provide precise and synchronized time information, which is crucial for accurate positioning and navigation. By maintaining such a small time difference, the GPS program ensures that users can rely on the system for various applications, including aviation, maritime, and land-based navigation.

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  • 39. 

    (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 control of data transmission. Protocols ensure that data is transmitted reliably and efficiently between devices connected to a network. They provide a common language and guidelines for communication, allowing different devices and systems to understand and interact with each other effectively.

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  • 40. 

    (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 loopback is 127.0.0.1. This address is reserved for testing network communication between the local host (the device itself) and is commonly referred to as the loopback address. When a packet is sent to this address, it is immediately returned back to the sender without being transmitted on the network. This allows applications to test network functionality without the need for an actual network connection.

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  • 41. 

    (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 composed of two main components: the control unit and the arithmetic logic unit (ALU). The control unit is responsible for managing and coordinating the activities of the CPU, including fetching instructions from memory and executing them. The ALU performs mathematical and logical operations, such as addition, subtraction, and comparison, on the data stored in the CPU. Together, the control unit and ALU work together to carry out the instructions of a computer program.

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  • 42. 

    (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
    An optical communications system consists of a transmitter, cable, and receiver. The transmitter is responsible for converting electrical signals into optical signals, which are then transmitted through the cable. The cable acts as the transmission medium, allowing the optical signals to travel from the transmitter to the receiver. The receiver then converts the optical signals back into electrical signals for further processing. Therefore, the correct answer is transmitter, cable, and receiver.

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  • 43. 

    (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. The application of voltage causes the liquid crystal molecules to align in a specific direction, which in turn changes the orientation of the light passing through the material. This change in alignment and polarization allows for the manipulation of light to create the desired display on an LCD screen.

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  • 44. 

    (213) What encryption device may you rarely see due to its lower maximum data rate?

    • TSEC/KIV–7

    • TSEC/KIV–19

    • TSEC/KG–84

    • TSEC/KG–194

    Correct Answer
    A. TSEC/KIV–7
    Explanation
    The TSEC/KIV-7 is a type of encryption device that is rarely seen due to its lower maximum data rate. This suggests that the TSEC/KIV-7 is not as commonly used as other encryption devices because it has limitations in terms of the amount of data it can process or transmit. Therefore, it is less likely to be encountered in comparison to other encryption devices with higher data rates.

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  • 45. 

    (215) Which one is not a category of the operating system’s task categories?

    • User interface

    • Memory management

    • Troubleshoot interface

    • Processor management

    Correct Answer
    A. Troubleshoot interface
    Explanation
    The given options are categories of the operating system's task categories. User interface refers to the interaction between the user and the computer system. Memory management involves managing the computer's primary memory. Processor management involves managing the computer's central processing unit. However, "Troubleshoot interface" is not a recognized category of the operating system's task categories.

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  • 46. 

    (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 Data Link Layers are divided into these two sublayers. The Logical Link Control (LLC) sublayer is responsible for error control, flow control, and framing of data packets. It also provides services to the network layer. The Media Access Control (MAC) sublayer is responsible for controlling access to the physical media, such as Ethernet or Wi-Fi. It handles addressing and transmission of data packets onto the network.

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  • 47. 

    (203) What Transmission Control Protocol/Internet Protocol transport layer protocol provides reliable data delivery services?

    • Internet Protocol

    • User Datagram Protocol

    • Transmission Control Protocol

    • Internet Control Message Protocol

    Correct Answer
    A. Transmission Control Protocol
    Explanation
    Transmission Control Protocol (TCP) provides reliable data delivery services. TCP is a connection-oriented protocol that ensures the reliable and ordered delivery of data packets over the Internet. It uses acknowledgments and retransmission mechanisms to guarantee that data is delivered without errors or loss. TCP also handles flow control and congestion control to prevent network congestion and optimize data transmission. It is widely used for applications that require reliable data transfer, such as web browsing, email, and file transfer.

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  • 48. 

    (205) How many bits are in an IPv4 address?

    • 16 bits

    • 32 bits

    • 64 bits

    • 128 bits

    Correct Answer
    A. 32 bits
    Explanation
    An IPv4 address is made up of 32 bits. This means that there are 2^32 possible unique addresses in the IPv4 address space. Each bit in the address can be either 0 or 1, resulting in a total of 4,294,967,296 unique addresses. This addressing scheme is used to identify and locate devices on a network using the Internet Protocol version 4.

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  • 49. 

    (215) Software is generally divided into

    • Systems software and applications software

    • Operating systems software and systems software

    • Operating systems software and applications software

    • Systems software, operating systems software, and applications software

    Correct Answer
    A. Systems software, operating systems software, and applications software
    Explanation
    Software is generally divided into three main categories: systems software, operating systems software, and applications software. Systems software refers to software that is responsible for managing and controlling the computer hardware, such as operating systems, device drivers, and utilities. Operating systems software specifically refers to the software that manages the computer hardware and provides a platform for other software to run on, such as Windows, macOS, and Linux. Applications software, on the other hand, refers to software that is designed for specific tasks or applications, such as word processors, spreadsheets, and web browsers. Therefore, the correct answer is systems software, operating systems software, and applications software.

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  • Mar 21, 2023
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  • Sep 07, 2012
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