3DX5X Vol 2 Supervisors Comprehensive Exam

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  • 1/124 Questions

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

    • Physical
    • Logical
    • Star
    • Hybrid
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OSI Model Quizzes & Trivia
About This Quiz

This comprehensive exam tests knowledge on the OSI model, focusing on layers, their functions, and associated hardware like routers and switches. It prepares individuals in understanding network protocols and data handling.

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  • 2. 

    (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 it can have a combination of bus, ring, star, or other types of topologies. This allows for greater flexibility and scalability in the network design, as different sections of the network can be configured with different topologies based on their specific requirements.

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  • 3. 

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

    • Mobility.

    • Ease of installations.

    • War driving.

    • Motion capture technology.

    Correct Answer
    A. Mobility.
    Explanation
    The correct answer is mobility. Mobility refers to the ability to move about freely without being restricted by wires or cables. This term is commonly used in technology to describe wireless devices or systems that allow for easy movement and portability. In this context, mobility is the most appropriate term to describe the ability to move about without being tethered by wires. Ease of installations, war driving, and motion capture technology are not relevant to the given question.

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  • 4. 

    (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 with access privileges, an employee can either unintentionally compromise the network by falling victim to social engineering or phishing attacks, or intentionally exploit their privileges for personal gain or to assist external hackers. Employees are considered a potential insider threat as they have insider knowledge and access to sensitive information, making them a significant risk to the security of a network.

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  • 5. 

    (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) is the correct answer because it is an organization that has developed several wireless standards to meet the demands of security, speed, and flexibility of today's wireless networks. The IEEE is renowned for its work in the field of electrical engineering and is responsible for creating standards such as IEEE 802.11 (Wi-Fi) and IEEE 802.15 (Bluetooth). These standards ensure that wireless devices can communicate with each other effectively and securely.

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  • 6. 

    (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, such as the available routes and the associated metrics (such as cost or distance) for each route. These tables are used by the routing algorithm to make decisions on the best path for forwarding packets from a source to a destination. By continuously updating and maintaining these tables, routing algorithms can efficiently determine the shortest or most optimal routes for data transmission within a network.

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  • 7. 

    (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
    When a key is loaded into a fill device, it becomes classified. The classification of the fill device is determined by the classification of the loaded key. Therefore, the fill device is classified as soon as a key is loaded, and it holds the classification of the loaded key.

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  • 8. 

    (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 correct answer is "driver". A driver is a special program that acts as a bridge between the operating system and hardware devices that are not on the computer's motherboard. It allows the operating system to communicate with and control these external hardware devices, enabling them to function properly. Without a driver, the operating system would not be able to interact with or utilize these hardware components effectively.

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  • 9. 

    (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, such as how data flows from one device to another, without considering the physical layout or arrangement of the devices. This includes concepts like bus, ring, and mesh topologies, which determine how devices are interconnected and how data is routed between them.

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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
    The correct answer is Bus. In a bus topology, devices are connected to a common cable called the bus. The bus acts as a shared communication medium, allowing all devices to transmit and receive data. Each device on the network listens for data packets and only accepts those addressed to it. This topology is relatively simple and cost-effective, but it can suffer from performance issues if multiple devices try to transmit data simultaneously.

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  • 11. 

    (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 separate control and data connections to perform file transfers.

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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 the correct answer because it connects networks that are separated by large geographical distances, such as between cities, states, countries, or even worldwide. Unlike a Local Area Network (LAN) which connects devices within a limited area like a home or office, a WAN allows for communication and data transfer over long distances. Virtual Private Network (VPN) is a technology that creates a secure connection over a public network, while Metropolitan Area Network (MAN) connects networks within a specific geographic area like a city.

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  • 13. 

    (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 type of copper cable that consists of pairs of insulated wires twisted together. This design helps to reduce interference and crosstalk, ensuring clear and reliable transmission of voice signals. Twisted pair cable is widely used in telephone networks and is capable of carrying analog voice signals efficiently over long distances. It is a cost-effective and readily available transmission medium for voice communication.

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  • 14. 

    (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 detecting and removing viruses and other malicious software. By using both Norton and McAfee, the Air Force can ensure a higher level of protection against potential cyber threats.

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  • 15. 

    (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 due to concerns regarding both security and reliability. The military requires secure and reliable communication channels to ensure the confidentiality and integrity of their sensitive information. Wireless networks are vulnerable to security breaches and interference, which raised concerns about the safety of military operations. Additionally, the military needs reliable communication systems that can withstand harsh environments and maintain connectivity in challenging conditions. These concerns regarding security and reliability hindered the military's adoption of wireless network technology.

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  • 16. 

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

    • Application

    • Session

    • Presentation

    • Transport

    Correct Answer
    A. Application
    Explanation
    The Open System Interconnect (OSI) model is a conceptual framework that standardizes the functions of a communication system. The OSI model consists of seven layers, each responsible for specific tasks. The layer closest to the end user is the Application layer. This layer provides services directly to the user, such as email, web browsing, and file transfer. It interacts with the user and serves as the interface between the user and the underlying network protocols.

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  • 17. 

    (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 protocols that allows for the reliable and secure transmission of data over networks. It is widely used in the internet and provides a standardized framework for communication between devices. TCP/IP ensures that data packets are delivered in the correct order and that errors in transmission are detected and corrected. It is the foundation of modern networking and is used by a wide range of industries and organizations, including the Department of Defense.

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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) is a type of network that uses 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 businesses to provide secure remote access for their employees, as well as by individuals to protect their online privacy and bypass geographical restrictions.

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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 the first octet. Class A addresses have a range of 1-126 in the first octet, so an IPv4 address with a range of 1-136 in the first octet belongs to Class A.

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  • 20. 

    (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 loopback address is a reserved IPv4 address that is used to test network connectivity on a local device. The correct answer is 127.0.0.1. This address is commonly referred to as the localhost address and is used to send network packets back to the device itself. It can be used to troubleshoot network issues or test network applications without actually sending data over a physical network.

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  • 21. 

    (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 turned off, 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 the long-term storage and retrieval of data, making it essential for preserving information even during power outages or system shutdowns.

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  • 22. 

    (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 requires a transmitter to convert electrical signals into optical signals, a cable to transmit the optical signals, and a receiver to convert the optical signals back into electrical signals. A logic analyzer is not necessary for the basic functioning of an optical communications system. Similarly, a protocol analyzer is not required as it is used for analyzing and debugging communication protocols, which is not directly related to the transmission of optical signals. Therefore, the correct answer is transmitter, cable, and receiver.

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  • 23. 

    (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. It then undergoes an error check to ensure data integrity. Once the error check is complete, the frame is sent to the appropriate port for delivery. This method ensures that the entire frame is error-free before forwarding it, which helps in maintaining data integrity during transmission.

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  • 24. 

    (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 various factors such as network congestion, link quality, and available bandwidth to determine the most efficient route for data transmission. By constantly updating and adapting to network conditions, dynamic routing ensures optimal performance and reliability in data communication. Therefore, the correct answer is 2.

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  • 25. 

    (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 that have a wide range of functions, applications are tailored to perform a particular task or set of tasks. They are developed with a specific purpose in mind, such as word processing, photo editing, or financial calculations. This specificity allows applications to be more efficient and focused, providing users with the necessary tools and features to accomplish their specific goals.

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  • 26. 

    (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 created in the 1960s at Bell Labs and was designed to be portable and flexible, allowing it to run on different hardware platforms. UNIX became widely popular due to its multi-user and multitasking capabilities, as well as its robustness and stability. It laid the foundation for modern operating systems and has had a significant impact on the development of computer systems and software.

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  • 27. 

    (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. This directory is the top-level directory in the file system hierarchy and serves as the starting point for navigating the file system. It contains all other directories and files in the system.

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  • 28. 

    (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 the feature that lets you know that you have dialed the correct number at the proper level of security while using the Red Switch. The LCD provides a visual representation of the dialed number, confirming that it is correct and ensuring the appropriate level of security.

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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 an incident.

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  • 30. 

    (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. INFOCON levels are used by the military to indicate the current threat level and readiness status. INFOCON 2 indicates a substantial risk of attack and requires heightened security measures. Taking non-essential networks offline and using alternate methods of communication helps to minimize the risk of compromise during a potential attack.

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  • 31. 

    (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 the data transmission. By following a protocol, computers can communicate effectively and ensure that the information is transmitted accurately and reliably.

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  • 32. 

    (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 to help with troubleshooting. It is used by network devices to send error messages and operational information to indicate network problems or to diagnose network connectivity issues. ICMP messages include information about unreachable hosts, network congestion, and time exceeded. By using ICMP, network administrators can identify and troubleshoot network problems more efficiently.

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  • 33. 

    (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 used to determine which part of the IP address belongs to the network and which part belongs to the host. By using the subnet mask, the device can determine if a destination IP address is on the same network or a different network, allowing for proper routing and communication between devices.

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  • 34. 

    (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 correct answer is 10AB::3:0:1234:5678. This is an example of zero compression notation in IPv6. In zero compression, consecutive blocks of zeros are replaced with a double colon (::). This is done to simplify and shorten the representation of IPv6 addresses. In the given answer, the consecutive blocks of zeros between 10AB and 3 are compressed using double colon (::).

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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 that carries out the actual processing of data and instructions. The central processing unit (CPU) is responsible for this task, and it consists of several subunits, including the control unit, arithmetic logic unit, and the microprocessor. However, the microprocessor is the specific component within the CPU that performs the actual computation and controls the overall operation of the computer. Therefore, the correct answer is microprocessor.

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  • 36. 

    (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, namely the control unit and the arithmetic logic unit (ALU). The control unit is responsible for coordinating and managing the operations of the CPU, including fetching instructions from memory, decoding them, and executing them. On the other hand, the ALU performs arithmetic and logical operations, such as addition, subtraction, and comparison, required by the instructions. Therefore, the correct answer is control unit and arithmetic logic unit.

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  • 37. 

    (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 refer to unauthorized access points that can be set up by attackers to gain access to the network. War Drivers are individuals who drive around with wireless devices to detect and exploit vulnerabilities in wireless networks. Hackers are individuals who attempt to gain unauthorized access to a network. However, Direct Connections do not pose a specific security threat to Wireless Local Area Network as they are typically used for legitimate purposes, such as connecting devices directly to a router or modem.

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  • 38. 

    (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, typically a switch or hub. In this configuration, all communication between the computers passes through the central component, allowing for easy management and troubleshooting. This topology provides better performance and reliability compared to bus or ring topologies, as a single point of failure does not disrupt the entire network.

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  • 39. 

    (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 the 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 scenarios where a device does not have a configured IP address and needs to obtain one dynamically based on its MAC address.

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  • 40. 

    (204) Which is a common port that contains Hyper Text Transfer Protocol servers and proxies?

    • Port 80

    • Port 110

    • Port 443

    • Port 8080

    Correct Answer
    A. Port 8080
    Explanation
    Port 8080 is commonly used for hosting Hyper Text Transfer Protocol (HTTP) servers and proxies. While port 80 is the standard port for HTTP, port 8080 is often used as an alternative when the standard port is already occupied or when additional HTTP servers need to be hosted on the same machine. It allows for the communication of web browsers and servers, enabling the transfer of hypertext documents over the internet.

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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 address is divided into four octets, separated by dots. Each octet represents a decimal value ranging from 0 to 255, making it easier for users to read and understand the address. This format is widely used and familiar to most people, making it the preferred way to express IPv4 addresses.

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  • 42. 

    (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 means that the majority of the data should stay within the segment, reducing the need for data transfer across segments.

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  • 43. 

    (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 question asks for a category that is not a category of the operating system's task categories. The options provided are user interface, memory management, troubleshoot interface, and processor management. User interface, memory management, and processor management are all categories of the operating system's task categories. However, troubleshoot interface is not a recognized category of the operating system's task categories. Therefore, the correct answer is troubleshoot interface.

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  • 44. 

    (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 kernel is responsible for managing the core functions of the operating system. It acts as a bridge between the hardware and software, providing essential services such as memory management, process scheduling, and device driver management. The kernel is the central component of the operating system, handling system calls and ensuring that different parts of the system can communicate with each other effectively. Therefore, it is the correct answer for the question.

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  • 45. 

    (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 two sublayers: Logical Link Control (LLC) and Media Access Control (MAC). The LLC sublayer is responsible for error control, flow control, and framing. It provides a reliable link between the network layer and the MAC sublayer. The MAC sublayer is responsible for controlling access to the physical media, managing data transmission, and addressing. Together, these two sublayers ensure efficient and reliable data transmission over a network.

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  • 46. 

    (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 and forwarding data packets between different networks. Routers make decisions about the best path for data packets to reach their destination based on network addresses. They use routing protocols to exchange information with other routers and build a routing table, which helps them make these decisions. Therefore, routers play a crucial role in connecting different networks and ensuring efficient data transmission.

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  • 47. 

    (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
    The correct answer is Site-local. 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 or routable on the internet. They provide a way for devices within a site to communicate with each other without exposing their addresses to the outside world.

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  • 48. 

    (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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  • 49. 

    (208) How many peripherals can a Universal Serial Bus handle at once?

    • 127

    • 128

    • 227

    • 228

    Correct Answer
    A. 127
    Explanation
    A Universal Serial Bus (USB) can handle up to 127 peripherals at once. This is because USB uses a 7-bit address scheme to communicate with devices, allowing for a maximum of 127 unique addresses. Each peripheral connected to the USB is assigned a unique address, and the USB controller can communicate with all of them simultaneously. Therefore, the correct answer is 127.

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Quiz Review Timeline (Updated): Mar 18, 2023 +

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  • Current Version
  • Mar 18, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 30, 2013
    Quiz Created by
    RScott1206

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