CO1201 Computer Security Quiz
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Questions and Answers

What is the primary purpose of encryption?

  • To filter packets in a network
  • To detect malicious intrusions
  • To prevent physical access to devices
  • To hide the information's true meaning (correct)

    • Which of the following is NOT a type of encryption method?

  • IPSec
  • IDS (correct)
  • WEP
  • RSA

    • What is the primary function of a firewall?

  • To prevent physical access to devices
  • To encrypt data
  • To detect malicious intrusions
  • To filter packets in a network (correct)

    • Which of the following threats can be prevented by using encryption?

    <p>Sniffing, Eavesdropping, MitM</p> Signup and view all the answers

    What is the primary goal of system security?

    <p>To minimize downtime, interference, and malicious intrusion</p> Signup and view all the answers

    What is a physical threat to a system?

    <p>Physical access to devices</p> Signup and view all the answers

    What is a common technique used to extract passwords?

    <p>Sniffing</p> Signup and view all the answers

    What is a design problem related to passwords?

    <p>Using personal data</p> Signup and view all the answers

    What is an operation issue related to passwords?

    <p>Using common passwords</p> Signup and view all the answers

    What is an application issue related to passwords?

    <p>Password checking issues</p> Signup and view all the answers

    What is a good practice for creating passwords?

    <p>Using a sentence to create a password</p> Signup and view all the answers

    What is an alternative to passwords?

    <p>Biometric data</p> Signup and view all the answers

    What is a type of biometric data?

    <p>All of the above</p> Signup and view all the answers

    What is the estimated cracking time for the password '1’mAen6Std@'?

    <p>400 years</p> Signup and view all the answers

    What is the primary purpose of a Trojan horse?

    <p>To do something malicious or spy for the attacker</p> Signup and view all the answers

    What is a characteristic of a virus?

    <p>It requires user action to spread</p> Signup and view all the answers

    Which of the following is a risk associated with spam?

    <p>Time wastage</p> Signup and view all the answers

    What is a method of infection for malware?

    <p>Through infected files</p> Signup and view all the answers

    What is a prevention method for malware?

    <p>Installing anti-virus software</p> Signup and view all the answers

    What is a characteristic of a worm?

    <p>It can travel from one computer to another without user action</p> Signup and view all the answers

    Which of the following is a method of infection for malware?

    <p>Through network</p> Signup and view all the answers

    What is a risk associated with malware?

    <p>All of the above</p> Signup and view all the answers

    What is the primary difference between a credit card and a debit card?

    <p>Credit cards allow cardholders to borrow funds, while debit cards directly debit money from the bank account.</p> Signup and view all the answers

    What is an example of a fraud technique involving credit cards?

    <p>Creating a fraudulent card using an existing card number and PIN.</p> Signup and view all the answers

    What is a security measure used to prevent credit card fraud?

    <p>Requesting additional information, such as a postal code or PIN number.</p> Signup and view all the answers

    What is a feature of smart cards?

    <p>A microprocessor and memory chip in addition to a magnetic strip.</p> Signup and view all the answers

    What is a benefit of using RFID technology with smart cards?

    <p>It enables the creation of virtual cards instead of physical cards.</p> Signup and view all the answers

    What is a common type of fraud involving credit cards?

    <p>Forgery.</p> Signup and view all the answers

    What is a way to improve security when using credit or debit cards?

    <p>Requesting additional information, such as a postal code or PIN number.</p> Signup and view all the answers

    What is a feature of smart cards that allows for more secure transactions?

    <p>A microprocessor and memory chip.</p> Signup and view all the answers

    What is the primary goal of Physical Network Security?

    <p>To prevent unauthorized physical access to network components.</p> Signup and view all the answers

    Which of the following is NOT a type of Network Security category?

    <p>Information Network Security</p> Signup and view all the answers

    What is the main purpose of keeping a backup station (DR) in Physical Network Security?

    <p>To maintain network services in case of a disaster</p> Signup and view all the answers

    Which type of attack involves intercepting packets passing through the network?

    <p>Sniffing</p> Signup and view all the answers

    What is the primary goal of Administrative Network Security?

    <p>To control user behavior of using the network.</p> Signup and view all the answers

    What is Eavesdropping also known as?

    <p>Sniffing</p> Signup and view all the answers

    What is the primary goal of Technical Network Security?

    <p>To protect data stored and in transit.</p> Signup and view all the answers

    Which of the following is NOT a type of Network based attack?

    <p>Firewall</p> Signup and view all the answers

    Study Notes

    Network Security

    • Network security categories:
      • Physical Network Security: prevent unauthorized physical access to network components
      • Administrative Network Security: controls user behavior of using the network
      • Technical Network Security: protect data stored and in transit

    Physical Network Security

    • Access control:
      • Badges/ IDs
      • Biometrics (face detection, Iris and Fingerprints)
      • Smart locks
      • Key pads
    • Surveillance:
      • 24/7 cameras
      • Guards
      • Sensors-based mechanisms
    • Backup station (DR)

    Administrative Network Security

    • Allow only privileged personnel to make changes to the network
    • Keep a log of the changes made

    Technical Network Security

    • Network-based attacks:
      • Sniffing/ Eavesdropping
      • Man-in-the-middle attack
      • Spoofing
      • Denial of Service

    Eavesdropping

    • Information like passwords, card details, and other sensitive data is easily stolen while it is getting transferred from one device to another
    • Also known as sniffing attack

    Sniffing

    • Access to the network and intercept packets passing through the network
    • Prevention methods:
      • Intrusion Detection Systems (IDS)
      • Encryption

    Encryption

    • Information is converted into a secret code that hides the information's true meaning
    • Use a key to:
      • Make the secret code
      • Get the message from secret code
    • Process:
      • Encrypt at the sender
      • Decrypt at the receiver
    • Encryption methods:
      • WEP, WPA, WPA2, RSA
      • IPSec

    Firewall

    • Filters packets:
      • Receiving to the network (Ingress traffic)
      • Sending from the network (Egress traffic)
    • Check the rules in Windows firewall for filtering packets

    Prevention Methods

    • Sniffing, Eavesdropping, Man-in-the-middle: Encryption
    • Spoofing, DoS: IDS, Firewall

    System Security

    • Controls and safeguards taken to minimize:
      • Downtime
      • Interference
      • Malicious intrusion
    • Categories:
      • Physical security
      • OS and application security

    Physical Threats to a System

    • Physical access to devices
    • Attaching components to devices
    • Tamper with devices
    • Jamming the wires
    • Prevention methods:
      • Access control
      • Surveillance
      • Backup

    Attacks on OS and Applications

    • Password attacks
    • Malware attacks
    • Pharming
    • Spams
    • Phishing attacks

    Password Attacks

    • Common technique to authenticate systems
    • Can extract by:
      • Sniffing
      • Brute force
      • Dictionary attack
    • Prevention methods:
      • Set a good password that cannot be guessed easily
      • Account lock features
      • Multi-factor authentication
      • Encryption

    Good Practices for Creating Passwords

    • Dos:
      • Lengthy password
      • Case-sensitive password
      • Numbers and special characters included
      • Random characters
      • Memorable password
    • Don'ts:
      • Personal data
      • Short passwords
      • Repetitive characters
      • Same password for multiple applications

    Alternatives to Passwords

    • Biometric data:
      • Signature
      • Face recognition
      • Voice recognition
      • Fingerprint
      • Iris pattern
    • Additional questions

    Malware

    • Methods of infection:
      • Network
      • Infected files
      • Websites
      • Email
      • USB
    • Prevention methods:
      • Install anti-virus software and anti-spyware software

    Credit/ Debit Cards

    • Allows cardholders to borrow funds to pay for goods and services
    • Credit cards:
      • Customer has to pay back the amount to the bank after the purchase in a given time
      • Otherwise, interest is added
    • Debit cards:
      • Customer directly debits money from the bank account
    • Frauds:
      • Using credit card number and PIN number for transaction without the knowledge of the owner
      • Forgery
    • Prevention methods:
      • Request additional information
      • Verification code
      • Daily transaction limit

    Smart Cards

    • Most credit and debit cards are now smart cards
    • Includes:
      • Microprocessor
      • Memory chip
      • RFID
    • Has to place in the device instead of swiping
    • RFID allows creating virtual cards instead of physical cards using smartphones

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    Related Documents

    5. Computer Security - Lec 4.pdf

    Description

    This quiz covers the basics of computer security, including network security and system security. It's a part of the introduction to computer systems course.

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