RRD Job World wants to upgrade its network. The company decides to implement a TCP/IPbased network. According to the case study, RRD Job World is concerned about security. Which
of the following methods should the on-site employees use to communicate securely with the headquarters?
(Click the Exhibit button on the toolbar to see the case study.)

A.
Windows NT Challenge/Response (NTLM) authentication

B.
L2TP over IPSec

C.
Basic (Clear Text) authentication using SSL

D.
DNS security and group policies

Explanation: