You work as a Network Administrator for Tech Perfect Inc. The company has a wireless LAN infrastructure. The management wants to prevent unauthorized network access to local area networks and other information assets by the wireless devices. What will you do?

A.
Implement a dynamic NAT.

B.
Implement an ACL.

C.
Implement a WIPS.

D.
Implement a firewall.

Explanation:
You should implement a WIPS (Wireless Intrusion Prevention System) in the network. It prevents unauthorized network access to local area networks and other information assets by the wireless devices. The WIPS is typically implemented as an overlay to an existing Wireless LAN infrastructure, although it may be deployed standalone to enforce no-wireless policies within an organization. Fact What is WIPS? Hide Wireless intrusion prevention system (WIPS) monitors the radio spectrum for the presence of unauthorized, rogue access points and the use of wireless attack tools. The system monitors the radio spectrum used by wireless LANs, and immediately alerts a systems administrator whenever a rogue access point is detected. Conventionally it is achieved by comparing the MAC address of the participating wireless devices. Rogue devices can spoof MAC address of an authorized network device as their own. WIPS uses fingerprinting approach to weed out devices with spoofed MAC addresses. The idea is to compare the unique signatures exhibited by the signals emitted by each wireless device against the known signatures of pre-authorized, known wireless devices.

Answer A is incorrect. Dynamic NAT performs translation of one IP address to a different one dynamically. It uses dynamic translation type in which an address translation device performs address translation between two addresses, and possibly port numbers automatically.

Answer B is incorrect. An ACL (Access Control List) specifies which users or system processes are granted access to objects, as well as what operations are allowed on given objects.

Answer D is incorrect. Firewall prevents direct communication between computers in the network and the external computers, through the Internet.