You work as the security administrator at Certkiller .com. You want to implement a remote access
solution that will enable mobile users to access the corporate
Certkiller .com network. All mobile users will be using laptops that have Ethernet adapters to
access shared files and e-mail on the corporate Certkiller .com network. Half of the laptops are
equipped with modems.
What solution should you use?

A.
Use ISDN (Integrated Services Digital Network).

B.
Use Dial-up.

C.
Use SSL (Secure Sockets Layer).

D.
Use a VPN (Virtual Private Network) connection.

Explanation:
A VPN is a network connection that tunnels through a public network, providing the same level of
security as a local connection. When the salesmen create a VPN connection, they will be required
to authenticate to the VPN server. Once authenticated, they will virtual access to a private network
that is safe, secure, and encrypted. However, their access to resources on the private network will

be determined by their permissions on those resources.
Incorrect Answers:
A: ISDN is used mainly for Internet connectivity but can be used for remote access. However, this
would require an ISDN modem.
B: Dial-up is a remote access method that requires the use of modems in both the remote access
clients and the remote access server. Not all laptops have modems; therefore this option will not
meet the needs of all laptop users.
C: SSL is a website technology used to secure communication between a browser and a web
server. It is not used for remote access.References:Michael Cross, Norris L. Johnson, Jr. and
Tony Piltzecker, Security+ Study Guide and DVD Training System, Rockland, MA, Syngress,
2002, pp. 105-108, 119, 258, 353. Mike Pastore and Emmett Dulaney, Security+ Study Guide, 2nd
Edition, Alameda, Sybex, 2004, pp. 110, 112-114, 325.