Organizations should consider which of the following first before allowing external access to their LANs via the
Internet?

A.
Plan for implementing workstation locking mechanisms.

B.
Plan for protecting the modem pool.

C.
Plan for providing the user with his account usage information.

D.
Plan for considering proper authentication options.

Explanation:
LANs are typically protected from the Internet by firewalls. However, to allow external access to a LAN, you
need to open ports on the firewall to allow the connections. With the firewall allowing external connections into
the LAN, your last line of defense is authentication. You need to ensure that the remote user connecting to the
LAN is who they say they are. Therefore, before allowing external access into a LAN, you should plan and
implement proper authentication.
Incorrect Answers:
A: Workstation locking mechanisms are not the most important consideration when allowing external access to
a LAN. Without the proper authentication mechanism in place, an intruder could connect to the LAN from an
unlocked workstation.
B: Protecting the modem pool (if a modem pool is used to provide the remote access) is not the most important
consideration when allowing external access to a LAN. Without the proper authentication mechanism in place,
an intruder could connect to the LAN.
C: Providing the user with his account usage information is not the most important consideration when allowing
external access to a LAN. Protecting LAN resources by ensuring only authorized people can connect to the
LAN is far more important.