Which of the following security methods can be used to detect the DoS attack in order to enhance
the security of the network?

A.
Protocol analyzer

B.
WIPS

C.
WLAN controller

D.
Spectrum analyzer

Explanation:

WIPS is used to detect the DOS attack in order to enhance the security of the network. Wireless
intrusion prevention system (WIPS) is a network device that monitors the radio spectrum for the
presence of unauthorized access points (intrusion detection), and can automatically take
countermeasures (intrusion prevention). The primary purpose of a WIPS is to prevent unauthorized
network access to local area networks and other information assets by wireless devices.

Answer C is incorrect. A wireless LAN controller is a device that is used in combination with
Lightweight Access Point Protocol (LWAPP) to manage light weight access points in large quantities
by the network administrator or NOC. The wireless LAN controller is a part of the Data Plane within
the Cisco Wireless Model. The WLAN controller automatically handles the configuration of anywhere
from 6 to 300 wireless access-points, depending on the model.

Answer D is incorrect. A spectrum analyzer, or spectral analyzer, is a device that is used to examine
the spectral composition of some electrical, acoustic, or optical waveform. It may also measure the
power spectrum.
The analog and digital spectrum analyzers are as follows:
1.An analog spectrum analyzer uses either a variable band-pass filter whose mid-frequency is
automatically tuned (shifted, swept) through the range of frequencies of which the spectrum is to be
measured.
2.A digital spectrum analyzer computes the discrete Fourier transform (DFT), a mathematical
process that transforms a waveform into the components of its frequency spectrum.

Answer A is incorrect. A protocol analyzer is a network diagnostic utility for viewing the current
contents of a packet traveling on the network. Protocol analyzers are mainly used for performance
measurement and troubleshooting. These devices connect to the network to calculate key
performance indicators (KPI) to monitor the network and speed up troubleshooting activities.