Question 1

Some vulnerabilities cannot be closed by patching because there is an inherent bandwidth limit or active connection limit on all physical equipment and all software.

Accepted Answer

Some vulnerabilities cannot be closed by patching because there is an inherent bandwidth limit or active connection limit on all physical equipment and all software.

Question 2

The process table in UNIX permits a virtually infinite number of entries.

Accepted Answer

The process table in UNIX has a fixed size, limiting the number of concurrent processes that can be managed by the system.

Question 3

Most legitimate Ping utilities do not allow you to send a ping of less than 64 KB.

Accepted Answer

Most legitimate Ping utilities are designed to send very small data packets, typically much less than 64 KB, often around 32 bytes by default, to test connectivity between networked devices.

Question 4

Computers that are connected to the Internet utilize DNS to resolve URLs.

Accepted Answer

DNS (Domain Name System) is used by computers connected to the Internet to translate human-readable domain names (URLs) into IP addresses that computers use to identify each other on the network.

Question 5

ICMP is used to handle errors and exchange control messages on a network.

Accepted Answer

ICMP (Internet Control Message Protocol) is utilized for sending error messages and operational information indicating, for example, that a requested service is not available or that a host or router could not be reached.

Question 6

A(n) ____ occurs when the sysadmin has allowed the system to perform a variety of services without considering the system's limitations.
A)involuntary DoS
B)distributed DoS
C)isolated DoS
D)voluntary DoS

Accepted Answer

The answer of A(n) ____ occurs when the sysadmin has...

Question 7

____ attacks consume the limited resources of a computer or a network by transmitting a large number of packets as quickly as possible.
A)Software
B)Isolated
C)Flood
D)Void

Accepted Answer

Flood attacks are designed to overwhelm a system's resources by sending a high volume of traffic or data packets, effectively disrupting its normal operations.

Question 8

____ attacks exploit the existing software weaknesses. The effect is either degraded performance or crashes on the victim server.
A)Software
B)Flood
C)Voluntary
D)Isolated

Accepted Answer

Software attacks exploit vulnerabilities in existing software, leading to degraded performance or crashes.

Question 9

The ____ utility is used to determine if a specific machine located at a specific IP address is online.
A)Echo
B)Ping
C)ps
D)Alive

Accepted Answer

Ping is the utility used to check if a specific machine at a given IP address is online by sending ICMP echo request packets and waiting for a response.

Question 10

In a ____ attack, a hacker sends to the target computer a packet that has the identical source and destination IP address as that of the target computer.
A)DNS overflow
B)Teardrop
C)Land
D)Chargen

Accepted Answer

In a Land attack, the attacker sends packets to the target computer with the same source and destination IP address, exploiting vulnerabilities in the way the target system handles such packets to cause a denial of service.

Question 11

A(n) ______________________________ is a strategy designed to keep valid traffic from accessing the target of your attack.

Accepted Answer

The answer of A(n) ______________________________ is a strategy designed to...

Question 12

____________________ is a historical DoS attack in which the hacker uses the Ping utility to acquire access to a system.

Accepted Answer

The answer of ____________________ is a historical DoS attack in...

Question 13

______________________________ is a database that maps domain names to IP addresses.

Accepted Answer

The answer of ______________________________ is a database that maps domain...

Question 14

____________________ attacks are like SMURF DoS attacks, but instead of using ICMP packets, they use UDP packets.

Accepted Answer

The answer of ____________________ attacks are like SMURF DoS attacks,...

Question 15

A(n) ____________________ is a network of robot, or zombie, computers, which can harness their collective power to do considerable damage or send out huge amounts of junk e-mail.

Accepted Answer

The answer of A(n) ____________________ is a network of robot,...

Question 16

What are the main targets of DoS attacks and what do the attacks accomplish?

Accepted Answer

The answer of What are the main targets of DoS...

Question 17

Describe an example of a voluntary DoS attack.

Accepted Answer

The answer of Describe an example of a voluntary DoS...

Question 18

Under what conditions can a flood attack occur?

Accepted Answer

The answer of Under what conditions can a flood attack...

Quiz 11: Denial-Of-Service Attacks

Some vulnerabilities cannot be closed by patching because there is an inherent bandwidth limit or active connection limit on all physical equipment and all software.

The process table in UNIX permits a virtually infinite number of entries.

Most legitimate Ping utilities do not allow you to send a ping of less than 64 KB.

Computers that are connected to the Internet utilize DNS to resolve URLs.

ICMP is used to handle errors and exchange control messages on a network.

A(n) ____ occurs when the sysadmin has allowed the system to perform a variety of services without considering the system's limitations.

____ attacks consume the limited resources of a computer or a network by transmitting a large number of packets as quickly as possible.

____ attacks exploit the existing software weaknesses. The effect is either degraded performance or crashes on the victim server.

The ____ utility is used to determine if a specific machine located at a specific IP address is online.

In a ____ attack, a hacker sends to the target computer a packet that has the identical source and destination IP address as that of the target computer.

A(n) ______________________________ is a strategy designed to keep valid traffic from accessing the target of your attack.

____________________ is a historical DoS attack in which the hacker uses the Ping utility to acquire access to a system.

______________________________ is a database that maps domain names to IP addresses.

____________________ attacks are like SMURF DoS attacks, but instead of using ICMP packets, they use UDP packets.

A(n) ____________________ is a network of robot, or zombie, computers, which can harness their collective power to do considerable damage or send out huge amounts of junk e-mail.

What are the main targets of DoS attacks and what do the attacks accomplish?

Describe an example of a voluntary DoS attack.

Under what conditions can a flood attack occur?