CompTIA Security+ Question L-55

In order for Emily, a client, to logon to her desktop computer, she must provide her username, password, and a four digit PIN. Which of the following authentication methods is Emily using?

A. Three factor
B. Single factor
C. Two factor
D. Four factor

Answer: B

Explanation:
Single-factor authentication is when only one authentication factor is used. In this case, Something you know is being used as an authentication factor. Username, password, and PIN form part of Something you know.

CompTIA Security+ Question G-75

A network administrator uses an RFID card to enter the datacenter, a key to open the server rack, and a username and password to logon to a server. These are examples of which of the following?

A. Multifactor authentication
B. Single factor authentication
C. Separation of duties
D. Identification

Answer: B

Explanation:
Single-factor authentication (SFA) is a process for securing access to a given system by identifying the party requesting access via a single category of credentials. In this case, the network administrator makes use of an RFID card to access the datacenter, a key to access the server rack, and a username and password to access a server.

CompTIA Security+ Question G-2

Which of the following BEST describes using a smart card and typing in a PIN to gain access to a system?

A. Biometrics
B. PKI
C. Single factor authentication
D. Multifactor authentication

Answer: D

Explanation:
Multifactor authentication requires a user to provide two or more authentication factors for authentication purposes. In this case, a smart card (something they have) is one and a PIN (something they know) is the second.

CompTIA Security+ Question F-78

The security department has implemented a new laptop encryption product in the environment. The product requires one user name and password at the time of boot up and also another password after the operating system has finished loading. This setup is using which of the following authentication types?

A. Two-factor authentication
B. Single sign-on
C. Multifactor authentication
D. Single factor authentication

Answer: D

Explanation:
Single-factor authentication is when only one authentication factor is used. In this case, Something you know is being used as an authentication factor. Username, password, and PIN form part of Something you know.

CompTIA Security+ Question E-59

Speaking a passphrase into a voice print analyzer is an example of which of the following security concepts?

A. Two factor authentication
B. Identification and authorization
C. Single sign-on
D. Single factor authentication

Answer: A

Explanation:
Two-factor authentication is when two different authentication factors are provided for authentication purposes. Speaking (Voice) – something they are. Passphrase – something they know.

CompTIA Security+ Question A-6

A user attempting to log on to a workstation for the first time is prompted for the following information before being granted access: username, password, and a four-digit security pin that was mailed to him during account registration. This is an example of which of the following?

A. Dual-factor authentication
B. Multifactor authentication
C. Single factor authentication
D. Biometric authentication

Answer: C

Explanation:
Multi-factor authentication (MFA) is a method of computer access control which a user can pass by successfully presenting authentication factors from at least two of the three categories: knowledge factors (“things only the user knows”), such as passwords possession factors (“things only the user has”), such as ATM cards inherence factors (“things only the user is”), such as biometrics

In this question a username, password, and a four-digit security pin knowledge are all knowledge factors (something the user knows). Therefore, this is single-factor authentication.