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ECCouncil EC0-350 - Ethical Hacking and Countermeasures V8

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Total 878 questions

What is the primary drawback to using advanced encryption standard (AES) algorithm with a 256 bit key to share sensitive data?

A.

Due to the key size, the time it will take to encrypt and decrypt the message hinders efficient communication.

B.

To get messaging programs to function with this algorithm requires complex configurations.

C.

It has been proven to be a weak cipher; therefore, should not be trusted to protect sensitive data.

D.

It is a symmetric key algorithm, meaning each recipient must receive the key through a different channel than the message.

If an e-commerce site was put into a live environment and the programmers failed to remove the secret entry point that was used during the application development, what is this secret entry point known as?

A.

SDLC process

B.

Honey pot

C.

SQL injection

D.

Trap door

Which of the following techniques does a vulnerability scanner use in order to detect a vulnerability on a target service?

A.

Port scanning

B.

Banner grabbing

C.

Injecting arbitrary data

D.

Analyzing service response

An ethical hacker for a large security research firm performs penetration tests, vulnerability tests, and risk assessments. A friend recently started a company and asks the hacker to perform a penetration test and vulnerability assessment of the new company as a favor.  What should the hacker's next step be before starting work on this job?

A.

Start by foot printing the network and mapping out a plan of attack.

B.

Ask the employer for authorization to perform the work outside the company.

C.

Begin the reconnaissance phase with passive information gathering and then move into active information gathering.

D.

Use social engineering techniques on the friend's employees to help identify areas that may be susceptible to attack.

Which of the following is a symmetric cryptographic standard? 

A.

DSA

B.

PKI

C.

RSA

D.

3DES

What technique is used to perform a Connection Stream Parameter Pollution (CSPP) attack?

A.

Injecting parameters into a connection string using semicolons as a separator

B.

Inserting malicious Javascript code into input parameters

C.

Setting a user's session identifier (SID) to an explicit known value

D.

Adding multiple parameters with the same name in HTTP requests

Which of the following descriptions is true about a static NAT?

A.

A static NAT uses a many-to-many mapping.

B.

A static NAT uses a one-to-many mapping.

C.

A static NAT uses a many-to-one mapping.

D.

A static NAT uses a one-to-one mapping.

Which of the following business challenges could be solved by using a vulnerability scanner?

A.

Auditors want to discover if all systems are following a standard naming convention.

B.

A web server was compromised and management needs to know if any further systems were compromised.

C.

There is an emergency need to remove administrator access from multiple machines for an employee that quit.

D.

There is a monthly requirement to test corporate compliance with host application usage and security policies.

Which protocol and port number might be needed in order to send log messages to a log analysis tool that resides behind a firewall?

A.

UDP 123

B.

UDP 541

C.

UDP 514

D.

UDP 415

Which of the following network attacks relies on sending an abnormally large packet size that exceeds TCP/IP specifications?

A.

Ping of death

B.

SYN flooding

C.

TCP hijacking

D.

Smurf attack

Firewalk has just completed the second phase (the scanning phase) and a technician receives the output shown below. What conclusions can be drawn based on these scan results? TCP port 21 – no response  TCP port 22 – no response TCP port 23 – Time-to-live exceeded

A.

The firewall itself is blocking ports 21 through 23 and a service is listening on port 23 of the target host.

B.

The lack of response from ports 21 and 22 indicate that those services are not running on the destination server.

C.

The scan on port 23 passed through the filtering device. This indicates that port 23 was not blocked at the firewall.

D.

The scan on port 23 was able to make a connection to the destination host prompting the firewall to respond with a TTL error.

Which of the following techniques can be used to mitigate the risk of an on-site attacker from connecting to an unused network port and gaining full access to the network? (Choose three.)

A.

Port Security

B.

IPSec Encryption

C.

Network Admission Control (NAC)

D.

802.1q Port Based Authentication

E.

802.1x Port Based Authentication

F.

Intrusion Detection System (IDS)

In the software security development life cyle process, threat modeling occurs in which phase?

A.

Design

B.

Requirements

C.

Verification

D.

Implementation

Which of the following can take an arbitrary length of input and produce a message digest output of 160 bit?

A.

SHA-1

B.

MD5

C.

HAVAL

D.

MD4

An attacker sniffs encrypted traffic from the network and is subsequently able to decrypt it. The attacker can now use which cryptanalytic technique to attempt to discover the encryption key?

A.

Birthday attack

B.

Plaintext attack

C.

Meet in the middle attack

D.

Chosen ciphertext attack

Some passwords are stored using specialized encryption algorithms known as hashes. Why is this an appropriate method?

A.

It is impossible to crack hashed user passwords unless the key used to encrypt them is obtained.

B.

If a user forgets the password, it can be easily retrieved using the hash key stored by administrators.

C.

Hashing is faster compared to more traditional encryption algorithms.

D.

Passwords stored using hashes are non-reversible, making finding the password much more difficult.

Keystroke logging is the action of tracking (or logging) the keys struck on a keyboard, typically in a covert manner so that the person using the keyboard is unaware that their actions are being monitored.

How will you defend against hardware keyloggers when using public computers and Internet Kiosks? (Select 4 answers)

A.

Alternate between typing the login credentials and typing characters somewhere else in the focus window

B.

Type a wrong password first, later type the correct password on the login page defeating the keylogger recording

C.

Type a password beginning with the last letter and then using the mouse to move the cursor for each subsequent letter.

D.

The next key typed replaces selected text portion. E.g. if the password is "secret", one could type "s", then some dummy keys "asdfsd".

Then these dummies could be selected with mouse, and next character from the password "e" is typed, which replaces the dummies

"asdfsd"

E.

The next key typed replaces selected text portion. E.g. if the password is "secret", one could type "s", then some dummy keys "asdfsd".

Then these dummies could be selected with mouse, and next character from the password "e" is typed, which replaces the dummies

"asdfsd"

When utilizing technical assessment methods to assess the security posture of a network, which of the following techniques would be most effective in determining whether end-user security training would be beneficial?

A.

Vulnerability scanning

B.

Social engineering

C.

Application security testing

D.

Network sniffing

NTP allows you to set the clocks on your systems very accurately, to within 100ms and sometimes-even 10ms. Knowing the exact time is extremely important for enterprise security. Various security protocols depend on an accurate source of time information in order to prevent "playback" attacks. These protocols tag their communications with the current time, to prevent attackers from replaying the same communications, e.g., a login/password interaction or even an entire communication, at a later date. One can circumvent this tagging, if the clock can be set back to the time the communication was recorded. An attacker attempts to try corrupting the clocks on devices on your network. You run Wireshark to detect the NTP traffic to see if there are any irregularities on the network. What port number you should enable in Wireshark display filter to view NTP packets?

A.

TCP Port 124

B.

UDP Port 125

C.

UDP Port 123

D.

TCP Port 126

A company has made the decision to host their own email and basic web services. The administrator needs to set up the external firewall to limit what protocols should be allowed to get to the public part of the company's network. Which ports should the administrator open? (Choose three.)

A.

Port 22

B.

Port 23

C.

Port 25

D.

Port 53

E.

Port 80

F.

Port 139

G.

Port 445