Home » Cisco » 300-375 » Which two events are possible outcomes of a successful RF jamming attack?
Which two events are possible outcomes of a successful RF jamming attack? (Choose two.)
A. unauthentication association
B. deauthentication multicast
C. deauthentication broadcast
D. disruption of WLAN services
E. physical damage to AP hardware
Correct Answer: DE
Explanation/Reference:
Explanation: WLAN reliability and efficiency depend on the quality of the radio frequency (RF) media. Each RF is susceptible to RF noise impact. An attacker using this WLAN vulnerability can perform two types of DoS attacks:
. Disrupt WLAN service — At the 2.4 GHz unlicensed spectrum, the attack may be unintentional. A cordless phone, Bluetooth devices, microwave, wireless surveillance video camera, or baby monitor can all emit RF energy to disrupt WLAN service. Malicious attacks can manipulate the RF power at 2.4 GHz or 5 GHz spectrum with a high-gain directional antenna to amplify the attack impact from a distance. With free-space and indoor attenuation, a 1-kW jammer 300 feet away from a building can jam 50 to 100 feet into the office area. The same 1-kW jammer located inside a building can jam 180 feet into the office area. During the attack, WLAN devices in the target area are out of wireless service.
. Physically damage AP hardware — An attacker using a high-output transmitter with directional high gain antenna 30 yards away from an access point can pulse enough RF power to damage electronics in the access point putting it being permanently out of service. Such High Energy RF (HERF) guns are effective and are inexpensive to build.
Reference: http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wlan-security/82196-mfp.html#climfp
