Desktop Support Practice Exam: Quiz!

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Robert Collins
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Desktop Support Practice Exam: Quiz! - Quiz

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Questions and Answers
  • 1. 

    Processors of all computers, whether micro, mini or mainframe must-have?

    • A.

      ALU

    • B.

      File unit

    • C.

      Copy unit

    • D.

      All of above

    Correct Answer
    A. ALU
    Explanation
    All computers, regardless of their size or type (micro, mini, or mainframe), must have an Arithmetic Logic Unit (ALU). The ALU is responsible for performing arithmetic and logical operations, such as addition, subtraction, multiplication, and comparison, which are essential for carrying out various tasks and calculations in a computer system. It is a fundamental component of a processor and is necessary for the proper functioning of a computer.

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  • 2. 

    A collection of 8 bits is called?

    • A.

      Megabit

    • B.

      Byte

    • C.

      Word

    • D.

      Record

    Correct Answer
    B. Byte
    Explanation
    A collection of 8 bits is called a byte. A bit is the smallest unit of information in computing and can have a value of either 0 or 1. A byte consists of 8 bits and is commonly used as the basic unit of storage in computer systems. It can represent a single character or a small amount of data.

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  • 3. 

    The first step in troubleshooting many problems is to verify which of the following?

    • A.

      The subnet mask is valid

    • B.

      TCP/IP is installed correctly on the client

    • C.

      The WINS server is running

    • D.

      The BDC is operable

    Correct Answer
    B. TCP/IP is installed correctly on the client
    Explanation
    The correct answer is TCP/IP is installed correctly on the client. This is because TCP/IP is the protocol used for communication on the internet and local networks. If TCP/IP is not installed correctly on the client, it can lead to various connectivity issues and problems accessing network resources. Therefore, verifying that TCP/IP is installed correctly is an important first step in troubleshooting network problems.

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  • 4. 

    Because the configuration information for a DHCP client is received dynamically, you must use which utility to read the current configuration to verify the settings?

    • A.

      PING

    • B.

      TRACERT

    • C.

      ARP

    • D.

      IPCONFIG

    Correct Answer
    D. IPCONFIG
    Explanation
    The correct answer is IPCONFIG because it is a utility that is used to display the current configuration of a DHCP client. It provides information such as the IP address, subnet mask, default gateway, and DNS servers that are assigned to the client dynamically by the DHCP server. By using IPCONFIG, you can verify the settings of the DHCP client and ensure that it has received the correct configuration from the DHCP server.

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  • 5. 

    Which of the following is the address of the router?

    • A.

      The IP address

    • B.

      The TCP address

    • C.

      The subnet mask

    • D.

      The default gateway

    Correct Answer
    D. The default gateway
    Explanation
    The default gateway is the address of the router that connects a local network to other networks. It acts as an entry or exit point for traffic between different networks. When a device on a network wants to communicate with a device on another network, it sends the data to the default gateway, which then forwards it to the appropriate destination. Therefore, the default gateway is the correct answer as it represents the address of the router.

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  • 6. 

    Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

    • A.

      0.0.0.0, 0.0.0.1, 0.0.1.1

    • B.

      255.255.255.0, 255.255.0.0, 255.0.0.0

    • C.

      255.0.0.0, 255.255.0.0, 255.255.255.0

    • D.

      255.255.0.0, 255.255.255.0, 255.255.255.255

    Correct Answer
    C. 255.0.0.0, 255.255.0.0, 255.255.255.0
    Explanation
    The default subnet mask for a class A network is 255.0.0.0, for a class B network is 255.255.0.0, and for a class C network is 255.255.255.0.

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  • 7. 

    Sending a file from your personal computer's primary memory or disk to another computer is called:

    • A.

      Uploading

    • B.

      Downloading

    • C.

      Logging on

    • D.

      Hang on

    Correct Answer
    A. Uploading
    Explanation
    Uploading refers to the process of sending a file from your personal computer's primary memory or disk to another computer. It involves transferring data from a local device to a remote device or server. This can be done through various methods such as email attachments, file transfer protocols, or cloud storage services. Uploading is the opposite of downloading, which involves receiving files from a remote device to a local device. Logging on refers to the act of accessing a computer system or network with valid credentials, while "hang on" is not related to the file transfer process.

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  • 8. 

    What device separates a single network into two segments but lets the two segments appear as one to higher protocols?

    • A.

      Switch

    • B.

      Bridge

    • C.

      Gateway

    • D.

      Router

    Correct Answer
    D. Router
    Explanation
    A router is a device that separates a single network into two segments but lets the two segments appear as one to higher protocols. It does this by examining the destination IP address of incoming packets and determining the best path for them to reach their destination. By doing so, a router can effectively connect multiple networks together and allow them to communicate with each other. This makes it an essential device in creating and managing complex network infrastructures.

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  • 9. 

    What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?

    • A.

      192

    • B.

      192.168.10

    • C.

      0.0.0.5

    • D.

      None of the above

    Correct Answer
    B. 192.168.10
    Explanation
    The Network ID is the part of the IP address that identifies the network to which the device belongs. In this case, the IP address is 192.168.10.51 and assuming a default subnet mask, the Network ID would be 192.168.10. This is because the default subnet mask for a Class C network is 255.255.255.0, which means the first three octets (192.168.10) represent the network, and the last octet (51) represents the host within that network. Therefore, the correct answer is 192.168.10.

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  • 10. 

    How many pins does a SIMM have?

    • A.

      50

    • B.

      90

    • C.

      30/72

    • D.

      45/50

    Correct Answer
    C. 30/72
  • 11. 

    The various cards in a PC requires  _______ voltage to function.

    Correct Answer
    DC
    Explanation
    The various cards in a PC require DC (direct current) voltage to function. Unlike AC (alternating current), which constantly changes direction, DC provides a steady flow of current in one direction. This is necessary for the proper operation of electronic components in a PC, such as the motherboard, graphics card, and sound card. DC voltage is typically provided by the power supply unit in a PC, which converts the AC power from the wall outlet into the appropriate DC voltage levels required by the components.

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  • 12. 

     What type of hard disk formatting creates FAT (File Allocation Table) ?

    • A.

      High level

    • B.

      Low level

    • C.

      Minimum level

    • D.

      Maximum level

    Correct Answer
    A. High level
    Explanation
    High level formatting is the type of hard disk formatting that creates FAT (File Allocation Table). This process involves creating a new file system on the hard disk, initializing the FAT structure, and dividing the disk into logical sectors. High level formatting prepares the disk for data storage and organizes it in a way that the operating system can understand and access the files stored on it. This type of formatting is typically performed during the initial setup of a hard disk or when reformatting it.

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  • 13. 

    Which Component of pc maintains data and time?

    • A.

      CMOS RAM

    • B.

      vRAM

    • C.

      DB RAM

    • D.

      ROM

    Correct Answer
    A. CMOS RAM
    Explanation
    CMOS RAM, or Complementary Metal-Oxide-Semiconductor Random Access Memory, is a component of a PC that maintains data and time. It is a type of non-volatile memory that stores the system's BIOS settings, including the date and time. This memory is powered by a small battery on the motherboard, allowing it to retain the information even when the computer is turned off. Therefore, CMOS RAM is responsible for maintaining accurate date and time information in a PC.

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  • 14. 

    IRQ 1 is commonly assigned to:

    • A.

      It's usually open

    • B.

      System timer

    • C.

      Real time clock

    • D.

      keyboard

    Correct Answer
    D. keyboard
    Explanation
    IRQ 1 is commonly assigned to the keyboard. IRQ stands for Interrupt Request, and it is a signal that a device sends to the CPU to request attention. In the case of IRQ 1, it is specifically allocated for the keyboard. This means that whenever a key is pressed on the keyboard, an interrupt signal is sent to the CPU through IRQ 1 to inform it that input has been received. The CPU then processes this input accordingly.

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  • 15. 

    LCD monitor is also known as___________

    • A.

      TPT

    • B.

      CRT

    • C.

      PCV

    • D.

      TFT

    Correct Answer
    D. TFT
    Explanation
    An LCD monitor is also known as a TFT (Thin Film Transistor) monitor. TFT is a type of LCD technology that uses thin film transistors to control the brightness and color of each pixel on the screen. This technology allows for faster response times, higher contrast ratios, and better image quality compared to other types of LCD monitors such as TPT or CRT. Therefore, the correct answer is TFT.

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  • 16. 

    SMPS stands for:

    • A.

      Switch Made Power Supply

    • B.

      Simple Mode Power Supply

    • C.

      Simple Made Power Supply

    • D.

      Switch Mode Power Supply

    Correct Answer
    D. Switch Mode Power Supply
    Explanation
    SMPS stands for Switch Mode Power Supply. This type of power supply uses a switching regulator to efficiently convert electrical power from one form to another. It is commonly used in electronic devices to convert AC voltage to DC voltage. The term "switch mode" refers to the use of a switching transistor to rapidly turn the power on and off, allowing for higher efficiency and smaller size compared to traditional linear power supplies.

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  • 17. 

    Which of the following is NOT a type of motherboard expansion slot?

    • A.

      ISA

    • B.

      PCI

    • C.

      AGP

    • D.

      ATX

    Correct Answer
    D. ATX
    Explanation
    The ATX is not a type of motherboard expansion slot. It is actually a form factor or a specification that determines the physical dimensions and layout of the motherboard. The ATX form factor specifies the size, shape, and placement of components on the motherboard, but it does not refer to a specific expansion slot type. The other options listed - ISA, PCI, and AGP - are all types of motherboard expansion slots that allow for the connection of additional components such as graphics cards, sound cards, and network cards.

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  • 18. 

    Data stored in a ROM can be changed by user of a computer?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The answer is false because data stored in a ROM (Read-Only Memory) cannot be changed by the user of a computer. ROM is a type of non-volatile memory that contains permanent instructions or data that cannot be modified or erased by normal computer operations. It is designed to store data that needs to be permanently stored and accessed by the computer system. Unlike RAM (Random Access Memory), which is volatile and can be read from and written to by the user, ROM is read-only and its contents are fixed during manufacturing.

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  • 19. 

    What is the name of the card that controls read,write head and motor in the hard disk ?

    • A.

      Network Card

    • B.

      NIC

    • C.

      Disc Controller Card

    • D.

      Network Controller Card

    Correct Answer
    C. Disc Controller Card
    Explanation
    The correct answer is Disc Controller Card. This card is responsible for controlling the read/write head and motor in a hard disk. It manages the data transfer between the computer and the hard disk, ensuring that the read/write operations are performed accurately and efficiently. The disc controller card plays a crucial role in the overall functioning of the hard disk and its interaction with the computer system.

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  • 20. 

    Fragmentation of data on computer hard disk causes it to work faster than before?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Fragmentation of data on a computer hard disk actually slows down its performance rather than making it work faster. Fragmentation occurs when files are divided into small scattered fragments across the hard disk, making it harder for the computer to access and retrieve the data quickly. This can result in slower read and write speeds, leading to decreased overall performance. To optimize the performance of a hard disk, regular defragmentation is necessary to rearrange the fragmented data and improve the efficiency of data access.

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  • 21. 

    Which of the following retains the information it's storing when the power to the system is turned off?

    • A.

      CPU

    • B.

      ROM

    • C.

      DRAM

    • D.

      DIMM

    Correct Answer
    B. ROM
    Explanation
    ROM (Read-Only Memory) retains the information it's storing when the power to the system is turned off. This is because ROM is a non-volatile memory type, meaning that it does not require power to maintain its data. The data stored in ROM is permanently written during manufacturing and cannot be modified or erased by normal computer operations. Therefore, even when the power is turned off, the information stored in ROM remains intact.

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  • 22. 

    What does FDISK do?

    • A.

      Performs low-level formatting of the hard drive

    • B.

      Fixes bad sectors on the hard drive

    • C.

      Recovers lost clusters on the hard drive

    • D.

      Creates partitions on the hard drive

    Correct Answer
    D. Creates partitions on the hard drive
    Explanation
    FDISK is a utility that is used to create partitions on a hard drive. It allows users to divide the hard drive into multiple sections, each of which can be used to store data separately. By creating partitions, users can organize their data more efficiently and allocate specific amounts of space for different purposes. FDISK does not perform low-level formatting, fix bad sectors, or recover lost clusters on the hard drive.

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  • 23. 

    That kind of connector is used to connect a PC power supply to a hard drive?

    • A.

      AT

    • B.

      Molex

    • C.

      Mini-molex

    • D.

      P9

    Correct Answer
    B. Molex
    Explanation
    A molex connector is used to connect a PC power supply to a hard drive. It is a type of power connector that provides power to various components inside a computer, including hard drives. The molex connector has multiple pins and is designed to securely connect to the corresponding pins on the hard drive, ensuring a reliable power connection. This type of connector is commonly used in desktop computers and has been in use for many years.

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  • 24. 

    Which of the following is NOT a type of computer hard drive?

    • A.

      IDE

    • B.

      FDD

    • C.

      SCSI

    • D.

      EIDE

    Correct Answer
    B. FDD
    Explanation
    The correct answer is FDD. FDD stands for Floppy Disk Drive, which is a type of storage device used in older computers. IDE, SCSI, and EIDE are all types of computer hard drives commonly used in desktop and server systems.

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  • 25. 

    What type of connector is used to plug a telephone line into a modem?

    • A.

      COM1

    • B.

      RJ-11

    • C.

      RJ-45

    • D.

      RJ-10

    Correct Answer
    B. RJ-11
    Explanation
    The correct answer is RJ-11. RJ-11 is the type of connector used to plug a telephone line into a modem. RJ-11 connectors are commonly used in telephone systems and have four wires, allowing for the transmission of both voice and data signals. RJ-11 connectors are smaller than RJ-45 connectors, which are used for Ethernet connections. RJ-10 is not a commonly used connector type.

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  • 26. 

    What is BIOS an acronym for?

    • A.

      Bootstrap initial operating system

    • B.

      basic input output startup

    • C.

      Boot initial operating startup

    • D.

      Basic input output system

    Correct Answer
    D. Basic input output system
    Explanation
    BIOS stands for Basic Input Output System. It is a firmware that is built into a computer's motherboard. BIOS is responsible for initializing and controlling hardware components during the boot-up process and provides a bridge between the hardware and the operating system. It performs various tasks such as conducting a power-on self-test (POST), loading the operating system, and managing system settings.

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  • 27. 

    Which frequency is an SDRAM clock speed?

    • A.

      122Mhz

    • B.

      132Mhz

    • C.

      133Mhz

    • D.

      143Mhz

    Correct Answer
    C. 133Mhz
    Explanation
    SDRAM stands for Synchronous Dynamic Random-Access Memory. It is a type of computer memory that operates at a synchronized clock speed with the computer's bus speed. The clock speed determines the rate at which data can be transferred to and from the memory module. Among the given options, 133Mhz is the only frequency that matches the typical clock speed of SDRAM modules commonly used in computer systems. Therefore, 133Mhz is the correct answer.

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  • 28. 

    Which of the following is NOT a type of RAM?

    • A.

      SIMM

    • B.

      DIMM

    • C.

      ROM

    • D.

      SLIPP

    Correct Answer
    C. ROM
    Explanation
    ROM stands for Read-Only Memory, which is a type of non-volatile memory that stores data permanently. Unlike RAM (Random Access Memory), ROM cannot be written to or modified. It contains firmware or software instructions that are permanently embedded by the manufacturer. SIMM (Single In-Line Memory Module) and DIMM (Dual In-Line Memory Module) are types of RAM that are used to temporarily store data that can be read from and written to by the computer. SLIPP is not a recognized type of RAM and is therefore not a correct answer option.

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  • 29. 

    What is different between AT and ATX power supplies?

    • A.

      They are identical except for their shape.

    • B.

      AT supplies use a single P1 power connector while ATX uses P8 and P9.

    • C.

      AT supplies use P8 and P9 power connectors while ATX uses a single P1 connector.

    • D.

      AT power supplies run on 120V AC current while ATX uses 220V AC

    Correct Answer
    C. AT supplies use P8 and P9 power connectors while ATX uses a single P1 connector.
    Explanation
    AT power supplies use P8 and P9 power connectors while ATX power supplies use a single P1 connector. This means that the main difference between AT and ATX power supplies lies in the type and number of power connectors they utilize. AT power supplies require two separate connectors (P8 and P9) to provide power to the motherboard, while ATX power supplies only require a single connector (P1). This difference in power connectors is what sets the two types of power supplies apart.

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  • 30. 

    Hard Disk, DVD, CD-ROM are the examples What type of Memory?

    • A.

      Primary

    • B.

      Secondary

    • C.

      System

    Correct Answer
    B. Secondary
    Explanation
    Hard Disk, DVD, and CD-ROM are examples of secondary memory. Secondary memory refers to the storage devices that are used to store data and programs permanently. Unlike primary memory (such as RAM), secondary memory retains data even when the power is turned off. Hard disks, DVDs, and CD-ROMs are commonly used for long-term storage of files, software, and other data. Therefore, they fall under the category of secondary memory.

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  • 31. 

    Portable Pen Drive connects to the________port of computer.

    Correct Answer
    USB
    Explanation
    A portable pen drive connects to the USB port of a computer. The USB (Universal Serial Bus) port is a standard interface that allows devices such as pen drives, external hard drives, and other peripherals to be connected to a computer. The USB port provides a fast and convenient way to transfer data between the computer and the pen drive.

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  • 32. 

    Today's PC use, DDR SDRAM  type of RAM?

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    DDR SDRAM is indeed a type of RAM that is commonly used in today's PCs. DDR stands for "Double Data Rate," which means that it can transfer data on both the rising and falling edges of the clock signal, effectively doubling the data transfer rate compared to its predecessor, SDRAM. DDR SDRAM offers faster data access and improved performance, making it a popular choice for modern computer systems.

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  • 33. 

     What are the four key functions of a computer system?

    • A.

      Input, processing, output, and storage

    • B.

      Keyboard, display, memory, and disk drive

    • C.

      Word processing, spreadsheets, database

    • D.

      bits, bytes, words, and OSI

    Correct Answer
    A. Input, processing, output, and storage
    Explanation
    The four key functions of a computer system are input, processing, output, and storage. Input refers to the data or instructions that are entered into the computer, such as through a keyboard or mouse. Processing involves manipulating and transforming the input data using the computer's central processing unit (CPU). Output refers to the results or information that is produced by the computer, such as displaying it on a monitor or printing it out. Storage refers to the ability of the computer to store and retrieve data and programs, typically using a hard drive or other storage devices.

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  • 34. 

    Connectivity is a concept related to:

    • A.

      transmitting information, either by computer or by phone

    • B.

      The interconnections within a computer

    • C.

      Using computer networks to link people and resources

    • D.

      Using computer networks to link people and resources

    Correct Answer
    C. Using computer networks to link people and resources
    Explanation
    The concept of connectivity refers to the use of computer networks to link people and resources. This means that through computer networks, individuals can connect with each other and access various resources such as information, files, and services. Connectivity allows for communication, collaboration, and sharing of resources, making it an essential aspect of modern technology and communication systems.

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  • 35. 

    One of the most dramatic changes in connectivity and communications in the past five years or so has been ____.

    • A.

      mobile or wireless telephones

    • B.

      public and private discussion

    • C.

      satellite uplinks

    • D.

      Running programs on remote computers

    Correct Answer
    A. mobile or wireless telephones
    Explanation
    In the past five years, there has been a significant shift in connectivity and communications with the widespread adoption of mobile or wireless telephones. These devices have revolutionized the way people communicate, allowing them to stay connected and access information from anywhere at any time. The convenience and accessibility offered by mobile or wireless telephones have dramatically changed the way people interact and communicate with each other, making it the most significant change in connectivity and communications in recent years.

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  • 36. 

    The four basic elements of any communication system include:

    • A.

      peer-to-peer, videoconferencing, online photo-conferencing, net optical

    • B.

      sending and receiving devices, communication channel, connection device, and data transmission specifications

    • C.

      Telephone lines, coaxial cables, fiber-optics cables, and communication channel

    • D.

      Software, hardware, communication channel, network

    Correct Answer
    B. sending and receiving devices, communication channel, connection device, and data transmission specifications
    Explanation
    The correct answer includes the essential components of a communication system. Sending and receiving devices are necessary for transmitting and receiving information. The communication channel is the medium through which the data is transmitted. The connection device facilitates the connection between the sending and receiving devices. Finally, data transmission specifications refer to the protocols and standards used for transmitting the data effectively.

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  • 37. 

    The transmission medium that carries the message is referred to as the

    • A.

      Send and receive device

    • B.

      Communication channel

    • C.

      Protocol

    • D.

      Gateways

    Correct Answer
    B. Communication channel
    Explanation
    The transmission medium refers to the physical pathway through which the message is transmitted from the sender to the receiver. It can be a wired or wireless medium such as cables, fiber optics, or airwaves. The term "communication channel" accurately describes this pathway, as it is the means by which the message is conveyed between the sender and receiver. The other options, such as send and receive device, protocol, and gateways, do not specifically refer to the transmission medium itself, but rather other components or processes involved in communication.

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  • 38. 

    Data is transmitted using light through a ____ cable.

    • A.

      twisted pair

    • B.

      Fiber-optic

    • C.

      coaxial

    • D.

      Microwave

    Correct Answer
    B. Fiber-optic
    Explanation
    Data is transmitted using light through a fiber-optic cable. Unlike other options like twisted pair, coaxial, and microwave cables, fiber-optic cables use pulses of light to carry data. This allows for faster and more efficient transmission of data over long distances. The use of light also makes fiber-optic cables immune to electromagnetic interference, resulting in a more reliable and secure transmission.

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  • 39. 

    Which physical connection is the fastest?

    • A.

      twisted pair

    • B.

      coaxial cable

    • C.

      fiber-optics

    • D.

      microwaves

    Correct Answer
    C. fiber-optics
    Explanation
    Fiber-optics is the fastest physical connection because it uses light signals to transmit data. These light signals travel at incredibly high speeds, allowing for faster data transfer rates compared to other physical connections like twisted pair, coaxial cable, and microwaves.

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  • 40. 

    Most Web-enabled devices follow a standard known as

    • A.

      FireWire

    • B.

      Bluetooth

    • C.

      TCP/IP

    • D.

      Wi-FI

    Correct Answer
    D. Wi-FI
    Explanation
    Wi-Fi is the correct answer because it is a widely used standard for wireless communication between devices. It allows devices to connect to the internet or communicate with each other without the need for physical cables. Wi-Fi is supported by most web-enabled devices, such as smartphones, tablets, laptops, and smart TVs. It provides convenience and flexibility in accessing the internet and sharing data wirelessly.

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  • 41. 

    This wireless standard is widely used to connect computers to each other and to the Internet.

    • A.

      802.11

    • B.

      RJ45

    • C.

      Blueband

    • D.

      Broadband

    Correct Answer
    A. 802.11
    Explanation
    802.11 is the correct answer because it is a wireless standard that is commonly used to connect computers to each other and to the Internet. It is also known as Wi-Fi and provides wireless connectivity in homes, offices, and public places. RJ45 is a type of connector used for Ethernet cables, Blueband is not a recognized wireless standard, and Broadband refers to high-speed Internet access but does not specifically refer to the wireless standard used for connectivity.

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  • 42. 

    A credit card-sized expansion board that is inserted into portable computers that connects the PC to the telephone wall jack is called what?

    • A.

      Internal modem

    • B.

      External modem

    • C.

      PC Card modem

    • D.

      Wireless modem

    Correct Answer
    C. PC Card modem
    Explanation
    A PC Card modem is a credit card-sized expansion board that is inserted into portable computers to connect them to the telephone wall jack. It allows the computer to access the internet or communicate with other devices through a telephone line.

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  • 43. 

    The rules for exchanging data between computers are called

    • A.

      Interconnections

    • B.

      Synchronous packages

    • C.

      protocols

    • D.

      data transmission synchronization

    Correct Answer
    C. protocols
    Explanation
    Protocols refer to the set of rules and guidelines that govern the exchange of data between computers. These protocols define the format, timing, sequencing, and error control mechanisms for data transmission. They ensure that data is transmitted accurately and efficiently across different computer systems and networks. Therefore, protocols are the correct answer as they specifically describe the rules for exchanging data between computers.

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  • 44. 

    Each computer on the Internet has a unique numeric address called a(n)

    • A.

      domain address

    • B.

      protocol address

    • C.

      IP address

    • D.

      Web address

    Correct Answer
    C. IP address
    Explanation
    Each computer on the Internet is identified by a unique numeric address called an IP address. This address is used to locate and communicate with the computer within the network. The IP address serves as a unique identifier for devices connected to the internet, allowing data packets to be routed correctly between them. It consists of a series of numbers separated by periods, such as 192.168.0.1.

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  • 45. 

    Two or more computers connected so that they can communicate with each other and share information is called a

    • A.

      Satellite

    • B.

      protocol

    • C.

      broadcast

    • D.

      Network

    Correct Answer
    D. Network
    Explanation
    A network is a system of interconnected computers that allows them to communicate and share information with each other. This enables the computers to work together, share resources such as files and printers, and access the internet. Networks can be set up in various ways, including wired or wireless connections, and can be used in homes, businesses, or across multiple locations.

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  • 46. 

    Any device that is connected to a network is called a

    • A.

      client

    • B.

      node

    • C.

      server

    • D.

      Manager

    Correct Answer
    B. node
    Explanation
    A node is a device that is connected to a network, such as a computer or a smartphone. It can send, receive, or forward data over the network. Unlike a server, which provides services or resources to other devices on the network, a node does not have any specific role or responsibility. It simply acts as a point of connection or communication within the network. Therefore, the correct answer is node.

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  • 47. 

    Frames from one LAN can be transmitted to another LAN via the device

    • A.

      Router

    • B.

      Bridge

    • C.

      Repeater

    • D.

      None of the above

    Correct Answer
    B. Bridge
    Explanation
    Bridges are networking devices that connect two LANs together and forward frames between them. They operate at the data link layer of the OSI model and use MAC addresses to determine where to send the frames. Unlike routers, bridges do not perform any IP routing or network layer functions. Instead, they simply forward frames based on their MAC addresses, making them suitable for connecting LANs within the same network. Therefore, bridges can transmit frames from one LAN to another LAN.

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  • 48. 

    Which of the following condition is used to transmit two packets over a medium at the same time?

    • A.

      Contention

    • B.

      Collision

    • C.

      Synchronous

    • D.

      None of the above

    Correct Answer
    B. Collision
    Explanation
    Collision is the correct answer because it refers to the situation where two or more packets are transmitted over a medium simultaneously and collide with each other, resulting in data loss and corruption. In a network, collisions occur when multiple devices attempt to send data at the same time on a shared medium, such as an Ethernet network. This is a common occurrence in networks that use a shared medium, and collision detection and avoidance mechanisms are employed to minimize the impact of collisions.

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  • 49. 

    Which of the following is used for modulation and demodulation?

    • A.

      Modem

    • B.

      Protocols

    • C.

      Gateway

    • D.

      Multiplexer

    Correct Answer
    A. Modem
    Explanation
    A modem is used for both modulation and demodulation. Modulation is the process of converting digital signals into analog signals for transmission, while demodulation is the process of converting analog signals back into digital signals for reception. A modem performs both of these functions, allowing digital data to be transmitted over analog communication channels such as telephone lines. It modulates the digital signals into analog signals for transmission and then demodulates the received analog signals back into digital signals for the receiving device. Therefore, a modem is the correct answer for this question.

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  • 50. 

    Your company has a LAN in its downtown office and has now set up a LAN in the manufacturing plant in the suburbs. To enable everyone to share data and resources between the two LANs, what type of device(s) are needed to connect them? Choose the most correct answer.

    • A.

      Modem

    • B.

      Cable

    • C.

      Hub

    • D.

      Router

    Correct Answer
    D. Router
    Explanation
    A router is needed to connect the LAN in the downtown office with the LAN in the manufacturing plant in the suburbs. A router is a networking device that forwards data packets between computer networks. It determines the best path for data to travel between the two LANs, enabling them to share data and resources effectively. A modem is used to connect to the internet, not to connect LANs. Cables and hubs are used for local connections within a LAN, but they do not facilitate connection between separate LANs.

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