CompTIA CompTIA Certifications SY0-501 Questions & Answers

• Question 671:

  The Chief Technology Officer (CTO) of a company, Ann, is putting together a hardware budget for the next 10 years. She is asking for the average lifespan of each hardware device so that she is able to calculate when she will have to replace

  each device.

  Which of the following categories BEST describes what she is looking for?

  A. ALE

  B. MTTR

  C. MTBF

  D. MTTF

  Correct Answer: D

• Question 672:

  Recently several employees were victims of a phishing email that appeared to originate from the company president. The email claimed the employees would be disciplined if they did not click on a malicious link in the message. Which of the following principles of social engineering made this attack successful?

  A. Authority

  B. Spamming

  C. Social proof

  D. Scarcity

  Correct Answer: A

• Question 673:

  Which of the following is the LEAST secure hashing algorithm?

  A. SHA1

  B. RIPEMD

  C. MD5

  D. DES

  Correct Answer: C

• Question 674:

  An employee uses RDP to connect back to the office network. If RDP is misconfigured, which of the following security exposures would this lead to?

  A. A virus on the administrator's desktop would be able to sniff the administrator's username and password.

  B. Result in an attacker being able to phish the employee's username and password.

  C. A social engineering attack could occur, resulting in the employee's password being extracted.

  D. A man in the middle attack could occur, resulting the employee's username and password being captured.

  Correct Answer: D

• Question 675:

  Joe is exchanging encrypted email with another party. Joe encrypts the initial email with a key. When Joe receives a response, he is unable to decrypt the response with the same key he used initially. Which of the following would explain the situation?

  A. An ephemeral key was used for one of the messages

  B. A stream cipher was used for the initial email; a block cipher was used for the reply

  C. Out-of-band key exchange has taken place

  D. Asymmetric encryption is being used

  Correct Answer: D

  Asymmetric algorithms use two keys to encrypt and decrypt datA. These asymmetric keys are referred to as the public key and the private key. The sender uses the public key to encrypt a message, and the receiver uses the private key to decrypt the message; what one key does, the other one undoes.

• Question 676:

  Which of the following attack types is being carried out where a target is being sent unsolicited messages via Bluetooth?

  A. War chalking

  B. Bluejacking

  C. Bluesnarfing

  D. Rogue tethering

  Correct Answer: B

  Bluejacking is the sending of unsolicited messages over Bluetooth to Bluetooth-enabled devices such as mobile phones, PDAs or laptop computers, sending a vCard which typically contains a message in the name field (i.e., for bluedating or bluechat) to another Bluetooth-enabled device via the OBEX protocol.

• Question 677:

  A supervisor in your organization was demoted on Friday afternoon. The supervisor had the ability to modify the contents of a confidential database, as well as other managerial permissions. On Monday morning, the database administrator reported that log files indicated that several records were missing from the database. Which of the following risk mitigation strategies should have been implemented when the supervisor was demoted?

  A. Incident management

  B. Routine auditing

  C. IT governance

  D. Monthly user rights reviews

  Correct Answer: D

• Question 678:

  A security technician would like to obscure sensitive data within a file so that it can be transferred without causing suspicion. Which of the following technologies would BEST be suited to accomplish this?

  A. Transport Encryption

  B. Stream Encryption

  C. Digital Signature

  D. Steganography

  Correct Answer: D

  Steganography is the process of hiding a message in another message so as to obfuscate its importance. It is also the process of hiding a message in a medium such as a digital image, audio file, or other file. In theory, doing this prevents analysts from detecting the real message. You could encode your message in another file or message and use that file to hide your message.

• Question 679:

  A technician must configure a firewall to block external DNS traffic from entering a network. Which of the following ports should they block on the firewall?

  A. 53

  B. 110

  C. 143

  D. 443

  Correct Answer: A

• Question 680:

  A software development company needs to share information between two remote servers, using encryption to protect it. A programmer suggests developing a new encryption protocol, arguing that using an unknown protocol with secure, existing cryptographic algorithm libraries will provide strong encryption without being susceptible to attacks on other known protocols. Which of the following summarizes the BEST response to the programmer's proposal?

  A. The newly developed protocol will only be as secure as the underlying cryptographic algorithms used.

  B. New protocols often introduce unexpected vulnerabilities, even when developed with otherwise secure and tested algorithm libraries.

  C. A programmer should have specialized training in protocol development before attempting to design a new encryption protocol.

  D. The obscurity value of unproven protocols against attacks often outweighs the potential for introducing new vulnerabilities.

  Correct Answer: B