Network Vulnerabilities and Attacks
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Network Vulnerabilities and Attacks

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Questions and Answers

What is a back door in software typically created for?

  • To increase security measures
  • To allow unauthorized access (correct)
  • To improve user interface
  • To enhance device performance

    • What does privilege escalation allow an attacker to do?

  • Improve system security protocols
  • Increase network bandwidth
  • Access public data only
  • Gain unauthorized access to restricted resources (correct)

    • Which of the following is NOT a type of denial of service (DoS) attack?

  • SYN flood
  • Ping flood attack
  • Smurf attack
  • DNS poisoning (correct)

    • What category does a man-in-the-middle attack belong to?

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

    Which of the following describes a SYN flood attack?

    <p>It sends a large volume of TCP SYN packets to overwhelm a server.</p> Signup and view all the answers

    What is the primary characteristic of a Distributed Denial of Service (DDoS) attack?

    <p>It floods a device with requests from multiple compromised computers.</p> Signup and view all the answers

    What type of attack uses the ping utility to send numerous echo request messages?

    <p>Ping flood attack</p> Signup and view all the answers

    In a SYN flood attack, what is exploited during the connection establishment process?

    <p>TCP/IP 3-way handshake</p> Signup and view all the answers

    What is a key feature of the Smurf attack?

    <p>It involves spoofing the target's IP address.</p> Signup and view all the answers

    Which type of attack records transmitted data without altering it?

    <p>Passive man-in-the-middle attack</p> Signup and view all the answers

    What is the result of a replay attack?

    <p>The attacker captures and reuses previously valid transmission.</p> Signup and view all the answers

    How does a SYN flood attack affect a target device?

    <p>It prevents legitimate users from establishing connections due to resource exhaustion.</p> Signup and view all the answers

    What is a result of using zombie computers in DDoS attacks?

    <p>Widespread and uncontrollable traffic to the target.</p> Signup and view all the answers

    What is the main difference between active and passive attacks in the context of interception?

    <p>Active attacks change the contents of communications while passive attacks do not.</p> Signup and view all the answers

    What makes identifying and blocking the source of a DDoS attack extremely challenging?

    <p>The multitude of compromised devices utilized in the attack.</p> Signup and view all the answers

    What does ARP poisoning primarily alter in a network?

    <p>The MAC address stored in the ARP cache.</p> Signup and view all the answers

    Which of the following is NOT a method to prevent DNS poisoning?

    <p>Implementing stronger password policies.</p> Signup and view all the answers

    What is the main purpose of the Address Resolution Protocol (ARP)?

    <p>To map IP addresses to MAC addresses.</p> Signup and view all the answers

    What is a likely consequence of successfully executing an ARP poisoning attack?

    <p>Interception of data meant for another device.</p> Signup and view all the answers

    Which location is NOT typically involved in DNS poisoning?

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

    What type of attack can result from ARP poisoning?

    <p>Man-in-the-middle attack.</p> Signup and view all the answers

    Which of these commonly exploited vulnerabilities can lead to privilege escalation in a network?

    <p>Outdated software packages.</p> Signup and view all the answers

    What is a primary indication of DNS poisoning?

    <p>Redirection to unintended web pages.</p> Signup and view all the answers

    In the context of network security, what does a Denial of Service (DoS) attack aim to achieve?

    <p>Make network resources unavailable to users.</p> Signup and view all the answers

    What is one effective strategy to mitigate DNS poisoning?

    <p>Regularly update DNS software with security patches.</p> Signup and view all the answers

    What is a default account in a network device context?

    <p>An account created automatically by the device for setup</p> Signup and view all the answers

    Which of the following accurately describes a backdoor in a network device?

    <p>An unauthorized method of remote access to a device</p> Signup and view all the answers

    What is a common target for attackers in a network device?

    <p>Default accounts left active after setup</p> Signup and view all the answers

    Privilege escalation in networking refers to what?

    <p>Gaining unauthorized control of user permissions</p> Signup and view all the answers

    Which method can NOT be used to create a backdoor on a network device?

    <p>Manual creation by the manufacturer</p> Signup and view all the answers

    What is a significant risk of keeping default accounts active on network devices?

    <p>Vulnerability to unauthorized access</p> Signup and view all the answers

    Which of the following best describes the purpose of a default account?

    <p>To facilitate initial setup of the device</p> Signup and view all the answers

    What could be a major consequence of privilege escalation in a network?

    <p>Unauthorized access to sensitive information</p> Signup and view all the answers

    Study Notes

    Network Vulnerabilities

    • Default accounts are created automatically by the device
    • They are often used for initial setup and installation, but should be deleted after
    • Back doors are accounts created secretly without administrator knowledge, allowing for remote access
    • They can be created by infection or by a software programmer
    • Privilege escalation exploits a vulnerability in a software to gain access to restricted resources

    Network Attacks

    • Denial of service (DoS) attacks consume network resources to prevent legitimate requests from being processed
    • Interception includes man-in-the-middle that intercepts communication and forges a response, and replay attacks that capture and reuse a transmission
    • Poisoning attacks alter lookup tables to redirect traffic, including ARP poisoning, which changes MAC address entries
    • DNS poisoning alters DNS addresses to redirect computers to a different device

    Denial of Service Attacks

    • Ping flood, Smurf, and SYN flood are all DoS attack methods
    • Ping flood attacks use ping utilty to send a large number of echo requests
    • Smurf attacks send pings with a spoofed originating address to overwhelm targets
    • SYN flood attacks exploit the TCP/IP 3-way handshake to prevent a connection

    Distributed Denial of Service Attacks

    • DDoS attacks utilize botnets to flood a device with requests
    • They are difficult to block because of the vast number of sources

    Interception Attacks

    • Man-in-the-middle attacks can be active or passive, with passive recording data and active altering content
    • Replay attacks capture transmissions and reuse them later

    Poisoning Attacks

    • ARP attacks alter the ARP table, allowing the attacker to intercept communication
    • DNS poisoning can be used to redirect hosts to a rogue server
    • DNS poisoning can be prevented by using the latest versions of BIND software

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    Related Documents

    Network Attacks PDF

    Description

    This quiz covers essential concepts related to network vulnerabilities and various types of attacks, including denial of service and interception techniques. Understand the significance of default accounts, back doors, and privilege escalation. Test your knowledge on poisoning attacks and typical strategies like ping flood and SYN flood.

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