Question 1

The attack in which the attacker sends a fragmented message that the victim cannot reconstruct is a(n)________ attack.
A)Teardrop
B)Land
C)myDoom
D)echo-chargen

Accepted Answer

A Teardrop attack involves sending fragmented packets that the target machine cannot reassemble, potentially leading to crashes or denial-of-service conditions.

Question 2

One classic denial-of-service attack distributed by email was _____________.
A)myDoom
B)Linux
C)pingflood
D)None of the above

Accepted Answer

myDoom was a worm that spread via email, causing a denial-of-service attack on targeted machines, making it a correct example of such an attack distributed by email.

Question 3

The attack in which the attacker sends a forged packet with the same source IP address and destination IP address in which the victim may be tricked into sending messages to and from itself is a(n)_______________ attack.
A)Teardrop
B)Land
C)myDoom
D)echo-chargen

Accepted Answer

The correct answer is B) Land. In a Land attack, the attacker sends a forged packet to a computer with the same source and destination IP address, causing the victim to continuously reply to itself, potentially leading to a denial of service.

Question 4

The attack in which the attacker sends a packet that is too large and can shut down a target machine is a(n)________________ attack.
A)ICMP flood
B)Ping of Death
C)Teardrop
D)None of the above

Accepted Answer

The Ping of Death attack involves sending packets that exceed the maximum allowed size, which can cause the target system to freeze, crash, or reboot due to its inability to handle the oversized packet.

Question 5

One defense against denial-of-service attacks is to _______ ICMP packets.
A)Block
B)Convert
C)Permit
D)Modify

Accepted Answer

Blocking ICMP packets can help mitigate the risk of certain types of Denial-of-Service (DoS) attacks, as ICMP can be used maliciously for attacks like Ping of Death or ICMP flood.

Quiz 4: Denial of Service Attacks

The attack in which the attacker sends a fragmented message that the victim cannot reconstruct is a(n) ________ attack.

One classic denial-of-service attack distributed by email was _____________.

The attack in which the attacker sends a forged packet with the same source IP address and destination IP address in which the victim may be tricked into sending messages to and from itself is a(n) _______________ attack.

The attack in which the attacker sends a packet that is too large and can shut down a target machine is a(n) ________________ attack.

One defense against denial-of-service attacks is to _______ ICMP packets.