.Which of the following is a passive attack method used by intruders to determine potential network
vulnerabilities?

.Which of the following fire-suppression methods is considered to be the most environmentally
friendly?

.What is a callback system?

.What type of fire-suppression system suppresses fire via water that is released from a main valve to
be delivered via a system of dry pipes installed throughout the facilities?

.Digital signatures require the sender to “sign” the data by encrypting the data with the sender’s
public key, to then be decrypted by the recipient using the recipient’s private key. True or false?

.Which of the following provides the BEST single-factor authentication?

.What is used to provide authentication of the website and can also be used to successfully
authenticate keys used for data encryption?

.What determines the strength of a secret key within a symmetric key cryptosystem?

.What process is used to validate a subject’s identity?

.What is often assured through table link verification and reference checks?