Question 1

If e-mail messages have a return address of someone other than the person actually sending the e-mail, then the sender is ____.
A)e-mail bombing
B)spoofing
C)smurfing
D)firewalling

Accepted Answer

Spoofing is the act of disguising the true sender of an email by modifying the email header. This can be done to deceive the recipient or to bypass spam filters.

Question 2

Some common types of denial of service include e-mail bombing, ____, and ping storm.
A)firewalling
B)filtering
C)smurfing
D)routing

Accepted Answer

E-mail bombing and ping storm are types of denial of service attacks, but they are not as common as smurfing. Smurfing involves sending a large number of ICMP echo request packets to a broadcast address, which causes all hosts on the network to respond to the requests and thus flood the target with traffic.

Question 3

A proxy server sits inside a company's corporate network.

Accepted Answer

A proxy server acts as an intermediary between a company's internal network and the wider internet, not inside the corporate network itself. It is used to control and secure internet traffic going in and out of the network.

Question 4

The DES algorithm works with 128-bit blocks of data.

Accepted Answer

DES (Data Encryption Standard) works with 64-bit blocks of data, not 128-bit.

Question 5

One very common technique to attack a system is to deliver an e-mail or Web page that contains a malicious piece of code called a ____.
A)NOS
B)firewall
C)proxy
D)mobile malicious code

Accepted Answer

Mobile malicious code is designed specifically for attacking mobile devices and can be delivered through an email, webpage or app. Options A, B, and C are not relevant to this type of attack.

Question 6

All certificates are issued by a certificate authority.

Accepted Answer

Certificates are issued by a trusted third party called a certificate authority (CA). The CA verifies the identity of the requester and issues a digital certificate that contains the requester's public key and other identifying information. This enables secure communication between the requester and other parties who trust the CA.

Question 7

A ____ virus mutates with every infection, thus making them difficult to locate.
A)polymorphic
B)macro
C)boot sector
D)file infector

Accepted Answer

Polymorphic viruses are capable of changing their code with every infection, making them difficult to detect and locate.

Question 8

The National Institute of Standards and Technology selected the algorithm Lucifer in October 2000 as the basis for AES.

Accepted Answer

The National Institute of Standards and Technology selected the Rijndael algorithm in October 2000 as the basis for AES, not Lucifer.

Question 9

To authenticate electronic documents as yours, you need to create a digital signature.

Accepted Answer

A digital signature is unique to the individual and serves as a way to authenticate electronic documents as belonging to that person.

Question 10

Many people consider the Trojan horse to be a form of computer ____.
A)virus
B)firewall
C)router
D)switch

Accepted Answer

The Trojan horse is a type of malware (malicious software) that is designed to appear harmless or useful, but actually contains code that can damage, steal or disrupt computer systems. Unlike a virus, which can spread by itself, Trojans rely on the user to unwittingly download and install them, often disguised as legitimate programs or files.

Question 11

A ____ virus is a common type of virus that is programmed into an attached macro file.
A)boot sector
B)macro
C)polymorphic
D)file infector

Accepted Answer

A macro virus is a type of computer virus that is programmed into an attached macro file, such as a Microsoft Excel or Word document. When the document is opened, the macro virus can execute and infect the computer.

Question 12

If you exclusive-OR a 0 and a 0, as is done with certain spread spectrum techniques, the result is 1.

Accepted Answer

If you exclusive-OR a 0 and a 0, the result will be 0, not 1.

Question 13

____ is the name of a particularly nasty automated program that attacks a network by exploiting Internet Protocol (IP) broadcast addressing and other aspects of Internet operation.
A)E-mail bombing
B)Spoofing
C)Smurfing
D)Firewalling

Accepted Answer

The described attack is known as "smurfing." E-mail bombing is a type of DoS attack that floods a victim's email inbox. Spoofing is when an attacker impersonates someone else in order to gain access to or manipulate a system. Firewalling is a security measure that helps protect a network from various types of attacks.

Question 14

WAP has been replaced by a new standard, Wired Equivalency Protocol (WEP).

Accepted Answer

WEP is actually an older standard for wireless security that has also been replaced by newer standards such as WPA and WPA2.

Question 15

A firewall cannot limit users on the Internet from accessing certain portions of a corporate network.

Accepted Answer

A firewall can be configured to restrict access to specific parts of a corporate network from users on the Internet, enhancing security by controlling inbound and outbound traffic based on predetermined security rules.

Question 16

A ____ virus is usually stored on some form of removable media. When the removable media (such as a flash drive) is connected to a new machine and is used to boot the machine, the virus moves from the media into the host system.
A)polymorphic
B)macro
C)boot sector
D)file infector

Accepted Answer

This describes a boot sector virus which infects the boot sector of a device such as a flash drive, and transfers to the host system when the device is used to boot the machine.

Question 17

A ____ virus is a virus that infects a piece of executable code such as an .exe or .com file.
A)polymorphic
B)macro
C)boot sector
D)file infector

Accepted Answer

A file infector virus is a type of virus that infects executable files such as .exe or .com files. It does not infect documents or macros (B) or boot sectors (C). Polymorphic viruses (A) can infect various types of files, not just executable files.

Question 18

One of the primary functions of Kerberos is to authenticate users.

Accepted Answer

Kerberos is a network authentication protocol that is used to verify the identity of a user or service on a network. Thus, one of its primary functions is indeed to authenticate users.

Question 19

A ____ is a common Internet tool used to verify if a particular IP address of a host exists and to see if the particular host is currently available.
A)ping
B)firewall
C)router
D)DNS

Accepted Answer

A ping is a tool used to test the connectivity between two hosts on a network. It sends ICMP packets to the host and waits for a response. If a response is received, it verifies that the host exists and is currently available.

Question 20

A packet filter firewall is a computer running proxy server software, whose function is much like that of a librarian who controls access to books in a library's rare books room.

Accepted Answer

A packet filter firewall is not the same as a computer running proxy server software. A packet filter firewall filters network traffic based on predetermined rules, while a proxy server acts as an intermediary between clients and servers.

Quiz 12: Network Security

If e-mail messages have a return address of someone other than the person actually sending the e-mail, then the sender is ____.

Some common types of denial of service include e-mail bombing, ____, and ping storm.

A proxy server sits inside a company's corporate network.

The DES algorithm works with 128-bit blocks of data.

One very common technique to attack a system is to deliver an e-mail or Web page that contains a malicious piece of code called a ____.

All certificates are issued by a certificate authority.

A ____ virus mutates with every infection, thus making them difficult to locate.

The National Institute of Standards and Technology selected the algorithm Lucifer in October 2000 as the basis for AES.

To authenticate electronic documents as yours, you need to create a digital signature.

Many people consider the Trojan horse to be a form of computer ____.

A ____ virus is a common type of virus that is programmed into an attached macro file.

If you exclusive-OR a 0 and a 0, as is done with certain spread spectrum techniques, the result is 1.

____ is the name of a particularly nasty automated program that attacks a network by exploiting Internet Protocol (IP) broadcast addressing and other aspects of Internet operation.

WAP has been replaced by a new standard, Wired Equivalency Protocol (WEP).

A firewall cannot limit users on the Internet from accessing certain portions of a corporate network.

A ____ virus is usually stored on some form of removable media. When the removable media (such as a flash drive) is connected to a new machine and is used to boot the machine, the virus moves from the media into the host system.

A ____ virus is a virus that infects a piece of executable code such as an .exe or .com file.

One of the primary functions of Kerberos is to authenticate users.

A ____ is a common Internet tool used to verify if a particular IP address of a host exists and to see if the particular host is currently available.

A packet filter firewall is a computer running proxy server software, whose function is much like that of a librarian who controls access to books in a library's rare books room.