Two-factor authentication uses something a user has in conjunction with something a user knows.
An authentication system that uses something a user has in conjunction with something a user knows is called:
An authentication system that uses something a user has in conjunction with something a user knows is called:
Open system authentication (default).
I think one is database server authentication, the other is operating system level authentication (could be at the network level).
Authentication
It depends. For robust and high risk system, Lightweight Directory Access Protocol (LDAP) authentication, or client-side public key infrastructure authentication.
kerberos
Authentication
A DRFU card works in conjunction with the transceiver on a cell phone. It is part of the radio system called the BTS.
Two-step authentication is a security process that requires users to provide two different forms of identification before accessing an account or system. Typically, this involves something the user knows (like a password) and something the user has (such as a smartphone or authentication app that generates a one-time code). This added layer of security helps protect against unauthorized access, even if the password is compromised.
Access Control Systems. Authentication. Multi-factor authentication Authorization. Firewalls and Internet Security. Intrusion prevention system. Intrusion detection system.
The answer depends on the type of computer system in which you are referring and too numerous to cover here given the vague nature of your question. Operating system login? Windows, OS X, Linux, Unix? ... Local or remote? Web based login? Google: computer authentication methods