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.
Which of the following is these examples of?

A.
Multifactor authentication

B.
Single factor authentication

C.
Separation of duties

D.
Identification

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.