Internet, Networking and Cyber Security MCQs

Solved computer awareness MCQs on networks (LAN, MAN, WAN), modems, DNS, IPv6, browsers, malware, OTP and two-factor authentication, CERT-In, the IT Act and the 1930 cyber crime helpline.

1. 1

   A network that covers a city is called a:

   APANBLANCMANDWAN

   Correct answer: C. MAN

   A Metropolitan Area Network spans a city. A LAN covers a building and a WAN covers a country or the world.

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2. 2

   A modem is used to:

   Aprint documentsBcool the processorCstore data permanentlyDconvert digital signals to analog and back

   Correct answer: D. convert digital signals to analog and back

   Modem means modulator–demodulator; it lets computers send data over telephone or cable lines.

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3. 3

   The padlock and "https" in a browser's address bar show that:

   Athe page is stored offlineBthe connection to the website is encryptedCthe website has no adsDthe website is government-owned

   Correct answer: B. the connection to the website is encrypted

   HTTPS encrypts data in transit, but it does not prove a site is honest; check the address carefully.

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4. 4

   The Domain Name System (DNS) is used to:

   Asend emailBcompress filesCblock virusesDtranslate domain names into IP addresses

   Correct answer: D. translate domain names into IP addresses

   DNS works like a phone book, turning names such as example.com into numeric IP addresses.

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5. 5

   A firewall protects a computer or network by:

   Aspeeding up the internetBbacking up dataCfiltering incoming and outgoing traffic according to rulesDcooling the hardware

   Correct answer: C. filtering incoming and outgoing traffic according to rules

   Firewalls block unauthorised connections while allowing permitted traffic.

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6. 6

   An IPv6 address is how many bits long?

   A32B64C128D256

   Correct answer: C. 128

   IPv6 uses 128-bit addresses, compared with 32 bits in IPv4, allowing a vastly larger number of addresses.

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7. 7

   Small text files that websites save in your browser to remember you are called:

   ApatchesBcachesCcookiesDplug-ins

   Correct answer: C. cookies

   Cookies store things like login sessions and preferences; you can delete them in browser settings.

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8. 8

   OTP stands for:

   AOfficial Transaction PINBOnline Transfer ProtocolCOne Time PasswordDOpen Text Process

   Correct answer: C. One Time Password

   An OTP is valid for a single use. Never share it with anyone, including callers claiming to be from your bank.

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9. 9

   Two-factor authentication means:

   Ahaving two email accountsBverifying identity with a second factor, such as an OTP, in addition to the passwordClogging in from two devicesDusing two passwords on one account

   Correct answer: B. verifying identity with a second factor, such as an OTP, in addition to the password

   Even if a password is stolen, the account stays protected without the second factor.

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10. 10

    Malicious software that spreads across networks by itself, without attaching to a host file, is a:

    AwormBvirusCcookieDTrojan horse

    Correct answer: A. worm

    A worm self-replicates over networks; a virus needs to attach to a file or program.

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12. 11

    A Trojan horse is malware that:

    Aonly affects printersBis spread only by USB drivesCdisguises itself as useful or legitimate softwareDimproves system speed

    Correct answer: C. disguises itself as useful or legitimate software

    Like the wooden horse of the legend, it looks harmless but carries a hidden harmful payload.

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13. 12

    CERT-In, India's national agency for responding to cyber security incidents, stands for:

    AIndian Computer Emergency Response TeamBCentral Electronic Regulatory Team of IndiaCCyber Enforcement and Research Team of IndiaDComputer Encryption Registration Taskforce

    Correct answer: A. Indian Computer Emergency Response Team

    CERT-In works under the Ministry of Electronics and Information Technology.

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14. 13

    India's main law on electronic records and cyber crime is the:

    ATelegraph Act, 1885BInformation Technology Act, 2000CCopyright Act, 1957DRight to Information Act, 2005

    Correct answer: B. Information Technology Act, 2000

    The IT Act, 2000 gave legal recognition to electronic records and defined cyber offences.

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15. 14

    The national helpline number for reporting financial cyber fraud in India is:

    A112B100C1098D1930

    Correct answer: D. 1930

    Call 1930 or report on cybercrime.gov.in as soon as possible. 112 is the general emergency number and 1098 the child helpline.

    Read details

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16. 15

    Bandwidth of an internet connection is usually measured in:

    Abits per second (e.g. Mbps)BpixelsChertz onlyDgigabytes

    Correct answer: A. bits per second (e.g. Mbps)

    Speeds are given in megabits or gigabits per second. File sizes are measured in bytes.

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17. 16

    Which of these is an example of cloud storage?

    AA DVDBGoogle DriveCRAMDA USB pen drive

    Correct answer: B. Google Drive

    Cloud storage keeps files on internet servers so they can be reached from any device.

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18. 17

    Browsing in a private (incognito) window means the browser:

    Ahides you from your internet providerBmakes downloads fasterCblocks all virusesDdoes not save your history and cookies after you close the window

    Correct answer: D. does not save your history and cookies after you close the window

    Private mode only affects what is saved on your own device; websites and your network can still see your activity.

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19. 18

    Websites ending in .gov.in belong to:

    AIndian government bodiesBuniversities abroadCnon-profit organisationsDprivate companies

    Correct answer: A. Indian government bodies

    The .gov.in domain is reserved for central and state government organisations; always check it on recruitment notices.

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20. 19

    Unwanted bulk email, usually advertising, is called:

    AoutboxBspamCarchiveDdraft

    Correct answer: B. spam

    Email services filter most spam into a separate folder.

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21. 20

    Wi-Fi is a technology for:

    AprintingBsatellite television onlyCstoring data on discsDwireless local area networking

    Correct answer: D. wireless local area networking

    Wi-Fi connects nearby devices to a network and the internet without cables.

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