Which of the following attacks are examples of Denial-of-service attacks (DoS)?
Each correct answer represents a complete solution. Choose all that apply.

• A.Birthday attack
• B.Ping flood attack
• C.Smurf attack
• D.Fraggle attack

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Which of the following types of attacks is the result of vulnerabilities in a program due to poor programming techniques?

• A.Evasion attack
• B.Denial-of-Service (DoS) attack
• C.Ping of death attack
• D.Buffer overflow attack

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Firewalking is a technique that can be used to gather information about a remote network protected by a firewall. This technique can be used effectively to perform information gathering attacks. In this technique, an attacker sends a crafted packet with a TTL value that is set to expire one hop past the firewall. Which of the following are pre-requisites for an attacker to conduct firewalking?
Each correct answer represents a complete solution. Choose all that apply.

• A.An attacker should know the IP address of a host located behind the firewall.
• B.ICMP packets leaving the network should be allowed.
• C.There should be a backdoor installed on the network.
• D.An attacker should know the IP address of the last known gateway before the firewall.

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In which of the following attacks does the attacker gather information to perform an access attack?

• A.Reconnaissance attack
• B.DoS attack
• C.Land attack
• D.Vulnerability attack

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Adam, a malicious hacker is running a scan. Statistics of the scan is as follows:
Scan directed at open port: ClientServer
192.5.2.92:4079 ---------FIN--------->192.5.2.110:23192.5.2.92:4079 <----NO RESPONSE---
---192.5.2.110:23
Scan directed at closed port:
ClientServer
192.5.2.92:4079 ---------FIN--------->192.5.2.110:23
192.5.2.92:4079<-----RST/ACK----------192.5.2.110:23
Which of the following types of port scan is Adam running?

• A.ACK scan
• B.FIN scan
• C.XMAS scan
• D.Idle scan

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