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SY0-401 Latest Exam (Sep 2017)

[Free] 2017(Sep) EnsurePass Passguide CompTIA SY0-401 Dumps with VCE and PDF 641-650

September 20, 2017

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CompTIA Security Certification

Question No: 641 – (Topic 3)

The practice of marking open wireless access points is called which of the following?

  1. War dialing

  2. War chalking

  3. War driving

  4. Evil twin

Answer: B Explanation:

War chalking is the act of making chalk marks on outdoor surfaces (walls, sidewalks, buildings, sign posts, trees) to indicate the existence of an open wireless network connection, usually offering an Internet connection so that others can benefit from the free wireless access. The open connections typically come from the access points of wireless networks located within buildings to serve enterprises. The chalk symbols indicate the type of access point that is available at that specific spot.

Question No: 642 – (Topic 3)

An organization must implement controls to protect the confidentiality of its most sensitive data. The company is currently using a central storage system and group based access control for its sensitive information. Which of the following controls can further secure the data in the central storage system?

  1. Data encryption

  2. Patching the system

  3. Digital signatures

  4. File hashing

Answer: A Explanation:

Data encryption makes data unreadable to anyone who does not have the required key to decrypt the data. The question states that the sensitive data is stored on a central storage

system. Group based access control is used to control who can access the sensitive data. However, this offers no physical security for the data. Someone could steal the central storage system or remove the hard disks from it with the plan of placing the hard disks into another system to read the data on the disks. With the data encrypted, the data would be unreadable.

Question No: 643 – (Topic 3)

Pete, the security engineer, would like to prevent wireless attacks on his network. Pete has implemented a security control to limit the connecting MAC addresses to a single port.

Which of the following wireless attacks would this address?

  1. Interference

  2. Man-in-the-middle

  3. ARP poisoning

  4. Rogue access point

Answer: D Explanation:

MAC filtering is typically used in wireless networks. In computer networking, MAC Filtering (or GUI filtering, or layer 2 address filtering) refers to a security access control method whereby the 48-bit address assigned to each network card is used to determine access to the network.

MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the use of blacklists and whitelists.

In this question, a rogue access point would need to be able to connect to the network to provide access to network resources. If the MAC address of the rogue access point isn’t allowed to connect to the network port, then the rogue access point will not be able to connect to the network.

Question No: 644 – (Topic 3)

The Chief Technology Officer (CTO) wants to improve security surrounding storage of customer passwords.

The company currently stores passwords as SHA hashes. Which of the following can the CTO implement requiring the LEAST change to existing systems?

  1. Smart cards

  2. TOTP

  3. Key stretching

  4. Asymmetric keys

Answer: A Explanation:

Smart cards usually come in two forms. The most common takes the form of a rectangular piece of plastic with an embedded microchip. The second is as a USB token. It contains a built in processor and has the ability to securely store and process information. A quot;contactquot; smart card communicates with a PC using a smart card reader whereas a quot;contactlessquot; card sends encrypted information via radio waves to the PC.

Typical scenarios in which smart cards are used include interactive logon, e-mail signing, e-mail decryption and remote access authentication. However, smart cards are programmable and can contain programs and data for many different applications. For example smart cards may be used to store medical histories for use in emergencies, to make electronic cash payments or to verify the identity of a customer to an e-retailer.

Microsoft provides two device independent APIs to insulate application developers from differences between current and future implementations: CryptoAPI and Microsoft Win32庐 SCard APIs.

The Cryptography API contains functions that allow applications to encrypt or digitally sign data in a flexible manner, while providing protection for the user#39;s sensitive private key data. All cryptographic operations are performed by independent modules known as cryptographic service providers (CSPs).

There are many different cryptographic algorithms and even when implementing the same algorithm there are many choices to make about key sizes and padding for example. For this reason, CSPs are grouped into types, in which each supported CryptoAPI function, by default, performs in a way particular to that type. For example, CSPs in the PROV_DSS provider type support DSS Signatures and MD5 and SHA hashing.

Question No: 645 – (Topic 3)

A company’s employees were victims of a spear phishing campaign impersonating the CEO. The company would now like to implement a solution to improve the overall security posture by assuring their employees that email originated from the CEO. Which of the following controls could they implement to BEST meet this goal?

  1. Spam filter

  2. Digital signatures

  3. Antivirus software

  4. Digital certificates

Answer: B Explanation:

A digital signature is a mathematical technique used to validate the authenticity and integrity of a message, software, or digital document.

The digital equivalent of a handwritten signature or stamped seal, but offering far more inherent security, a digital signature is intended to solve the problem of tampering and impersonation in digital communications. Digital signatures can provide the added assurances of evidence to origin, identity and status of an electronic document, transaction or message, as well as acknowledging informed consent by the signer.

Digital signatures are based on public key cryptography, also known as asymmetric cryptography. Using a public key algorithm such as RSA, one can generate two keys that are mathematically linked: one private and one public. To create a digital signature, signing software (such as an email program) creates a one-way hash of the electronic data to be signed. The private key is then used to encrypt the hash. The encrypted hash – along with other information, such as the hashing algorithm – is the digital signature. The reason for encrypting the hash instead of the entire message or document is that a hash function can convert an arbitrary input into a fixed length value, which is usually much shorter. This saves time since hashing is much faster than signing.

Question No: 646 – (Topic 3)

Which of the following is BEST utilized to actively test security controls on a particular system?

  1. Port scanning

  2. Penetration test

  3. Vulnerability scanning

  4. Grey/Gray box

Answer: B Explanation:

Penetration testing is the most intrusive type of testing because you are actively trying to circumvent the system’s security controls to gain access to the system.

Penetration testing (also called pen testing) is the practice of testing a computer system,

network or Web application to find vulnerabilities that an attacker could exploit.

Pen tests can be automated with software applications or they can be performed manually. Either way, the process includes gathering information about the target before the test (reconnaissance), identifying possible entry points, attempting to break in (either virtually or for real) and reporting back the findings.

The main objective of penetration testing is to determine security weaknesses. A pen test can also be used to test an organization#39;s security policy compliance, its employees#39; security awareness and the organization#39;s ability to identify and respond to security incidents.

Penetration tests are sometimes called white hat attacks because in a pen test, the good guys are attempting to break in.

Pen test strategies include: Targeted testing

Targeted testing is performed by the organization#39;s IT team and the penetration testing team working together. It#39;s sometimes referred to as a quot;lights-turned-onquot; approach because everyone can see the test being carried out.

External testing

This type of pen test targets a company#39;s externally visible servers or devices including domain name servers (DNS), e-mail servers, Web servers or firewalls. The objective is to find out if an outside attacker can get in and how far they can get in once they#39;ve gained access.

Internal testing

This test mimics an inside attack behind the firewall by an authorized user with standard access privileges. This kind of test is useful for estimating how much damage a disgruntled employee could cause.

Blind testing

A blind test strategy simulates the actions and procedures of a real attacker by severely limiting the information given to the person or team that#39;s performing the test beforehand. Typically, they may only be given the name of the company. Because this type of test can require a considerable amount of time for reconnaissance, it can be expensive.

Double blind testing

Double blind testing takes the blind test and carries it a step further. In this type of pen test, only one or two people within the organization might be aware a test is being conducted.

Double-blind tests can be useful for testing an organization#39;s security monitoring and

incident identification as well as its response procedures.

Question No: 647 – (Topic 3)

Joe, an administrator, installs a web server on the Internet that performs credit card transactions for customer payments. Joe also sets up a second web server that looks like the first web server.

However, the second server contains fabricated files and folders made to look like payments were processed on this server but really were not. Which of the following is the second server?

  1. DMZ

  2. Honeynet

  3. VLAN

  4. Honeypot

Answer: D Explanation:

In this scenario, the second web server is a ‘fake’ webserver designed to attract attacks. We can then monitor the second server to view the attacks and then ensure that the ‘real’ web server is secure against such attacks. The second web server is a honeypot.

A honeypot is a system whose purpose it is to be attacked. An administrator can watch and study the attack to research current attack methodologies.

According to the Wepopedia.com, a Honeypot luring a hacker into a system has several main purposes:

The administrator can watch the hacker exploit the vulnerabilities of the system, thereby learning where the system has weaknesses that need to be redesigned.

The hacker can be caught and stopped while trying to obtain root access to the system.

By studying the activities of hackers, designers can better create more secure systems that are potentially invulnerable to future hackers.

There are two main types of honeypots:

Production – A production honeypot is one used within an organization#39;s environment to help mitigate risk.

Research – A research honeypot add value to research in computer security by providing a

platform to study the threat.

Question No: 648 – (Topic 3)

Joe, the security administrator, has determined that one of his web servers is under attack. Which of the following can help determine where the attack originated from?

  1. Capture system image

  2. Record time offset

  3. Screenshots

  4. Network sniffing

Answer: D Explanation:

Network sniffing is the process of capturing and analyzing the packets sent between systems on the network. A network sniffer is also known as a Protocol Analyzer.

A Protocol Analyzer is a hardware device or more commonly a software program used to capture network data communications sent between devices on a network. Capturing and analyzing the packets sent to the web server will help determine the source IP address of the system sending the packets.

Well known software protocol analyzers include Message Analyzer (formerly Network Monitor) from Microsoft and Wireshark (formerly Ethereal).

Question No: 649 – (Topic 3)

Which of the following is where an unauthorized device is found allowing access to a network?

  1. Bluesnarfing

  2. Rogue access point

  3. Honeypot

  4. IV attack

Answer: B Explanation:

A rogue access point is a wireless access point that has either been installed on a secure company network without explicit authorization from a local network administrator, or has been created to allow a hacker to conduct a man-in-the-middle attack. Rogue access points of the first kind can pose a security threat to large organizations with many employees, because anyone with access to the premises can install (maliciously or non- maliciously) an inexpensive wireless router that can potentially allow access to a secure network to unauthorized parties. Rogue access points of the second kind target networks that do not employ mutual authentication (client-server server-client) and may be used in conjunction with a rogue RADIUS server, depending on security configuration of the target network.

To prevent the installation of rogue access points, organizations can install wireless intrusion prevention systems to monitor the radio spectrum for unauthorized access points.

Question No: 650 – (Topic 3)

After a user performed a war driving attack, the network administrator noticed several similar markings where WiFi was available throughout the enterprise. Which of the following is the term used to describe these markings?

  1. IV attack

  2. War dialing

  3. Rogue access points

  4. War chalking

Answer: D Explanation:

War chalking is the act of making chalk marks on outdoor surfaces (walls, sidewalks, buildings, sign posts, trees) to indicate the existence of an open wireless network connection, usually offering an Internet connection so that others can benefit from the free wireless access. The open connections typically come from the access points of wireless networks located within buildings to serve enterprises. The chalk symbols indicate the type of access point that is available at that specific spot.

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