INTRODUCTION – Secure Against Network Intrusions

TEST YOUR KNOWLEDGE: SECURE NETWORKS AGAINST DENIAL OF SERVICE (DOS) ATTACKS

1. What type of attack uses multiple devices or servers in different locations to flood the target network with unwanted traffic?

2. What type of attack poses as a TCP connection and floods a server with packets simulating the first step of the TCP handshake?

3. Fill in the blank: The Denial of Service (DoS) attack _____ is caused when a hacker sends a system an ICMP packet that is bigger than 64KB.

4. Which types of attacks take advantage of communication protocols by sending an overwhelming number of requests to a server? Select all that apply.

5. Which of the following are common network attacks? Select all that apply.

6. Fill in the blank: A _____ attack happens when an attacker sends a device or system oversized ICMP packets that are bigger than 64KB.

TEST YOUR KNOWLEDGE: NETWORK INTERCEPTION ATTACK TACTICS

1. Passive packet sniffing involves data packets being manipulated while in transit, which may include injecting internet protocols to redirect the packets to unintended ports or changing the information the packet contains.

2. Fill in the blank: A security analyst can protect against malicious packet sniffing by _____ to encrypt data as it travels across a network.

3. Which type of attack involves an attacker changing the source IP of a data packet to impersonate an authorized system and gain access to the network?

4. Which of the following statements accurately describes a smurf attack?

5. Which part of a data packet may contain valuable information about the data in transit?

6. Which of the following attacks use IP spoofing? Select three answers.

MODULE 3 CHALLENGE

1. What happens during a Denial of Service (DoS) attack?

2. Which type of attack overloads a network with traffic and overwhelms the target server?

3. A security team discovers that an attacker has taken advantage of the handshake process that is used to establish a TCP connection between a device and their server. Which DoS attack does this scenario describe?

4. Which type of attack occurs when a malicious actor sends an oversized ICMP packet to a server?

5. Which of the following statements Correctly describe passive and active packet sniffing? Select three answers.

6. As a security professional, you research on-path, replay, and smurf attacks in order to implement procedures that will protect your company from these incidents. What type of attack are you learning about?

7. Fill in the blank: To reduce the chances of an IP spoofing attack, a security analyst can configure a _____ to reject all incoming traffic with the same source IP addresses as those owned by the organization.

8. Fill in the blank: In a/an ____ attack, a malicious actor places themselves in the middle of an authorized connection and intercepts the data in transit.

9. Fill in the blank: The _____ network attack occurs when an attacker intercepts a data packet in transit, then repeats it at another time.

10. Fill in the blank: A ___ attack happens when a malicious actor sniffs an authorized user’s IP address and floods it with packets.

11. What is the main objective of a Denial of Service (DoS) attack?

12. A security team investigates a server that has been overwhelmed with SYN packets. What does this scenario describe?

13. Fill in the blank: The maximum size of a Correctly formatted IPv4 ICMP packet is _____, as opposed to the oversized packet that is sent during a Ping of Death attack.

14. Which type of packet sniffing allows malicious actors to view and read data packets in transit?

15. Fill in the blank: In a _____ attack, an attacker changes the source IP of a data packet to impersonate an authorized system and gain access to a network.

16. What are some common IP spoofing attacks? Select all that apply.

17. A malicious actor impersonates a web browser or web server by placing themselves between two devices, then sniffing the packet information to discover the IP and MAC addresses. Which type of attack is this?

18. Which attack involves an attacker sniffing an authorized user’s IP address and flooding it with packets?

19. What do network-level Denial of Service (DoS) attacks target?

20. A malicious actor intercepts a network transmission that was sent by an authorized user and repeats it at a later time to impersonate a user. Which type of attack is this?

21. A malicious actor takes down a network by flooding an authorized user’s IP address with packets. Which type of DDoS attack is this?

22. Fill in the blank: A _____ attack uses multiple devices in different locations to flood the target network with unwanted traffic.

23. Fill in the blank: _____ is a network attack performed when an attacker changes the source IP of a data packet to impersonate an authorized system and gain access to a network.