Which of the following is used to authenticate remote workers who connect from offsite? (Select TWO).

A.
OSPF

B.
VTP trunking

C.
Virtual PBX

D.
RADIUS

E.
802.1x

Explanation:
D: A RADIUS (Remote Authentication Dial-in User Service) server is a server with a database of user accounts
and passwords used as a central authentication database for users requiring network access. RADIUS servers
are commonly used by ISP’s to authenticate their customer’s Internet connections.
Remote users connect to one or more Remote Access Servers. The remote access servers then forward the
authentication requests to the central RADIUS server.
E: 802.1X is an IEEE Standard for Port-based Network Access Control (PNAC). It provides an authentication
mechanism to devices wishing to attach to a network.
802.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server. The
supplicant is a client that wishes to attach to the network. The authenticator is a network device, such as an
Ethernet switch, wireless access point or in this case, a remote access server and the authentication server is
the RADIUS server.