A. Why are jamming attacks generally rare/
a) They require expensive, sophisticated equipment
b) They can’t get around new IEEE amendments that fully protect WLAN
c) They can’t identify WLAN RF signals from other device signals
d) The transmitter is not very powerful and must be close to the target
B. Which of the following statements correctly defines jamming?
a) An attacker creates false DE authentication or disassociation management frames that appear to come from another client device, causing the client to disconnect from the AP.
b) An attacker tries to mimic an authorized AP. so a user’s mobile device such as a laptop or tablet unknowingly connects to the evil twin instead.
c) An attacker circumvents the security protections in the company’s network, accessing the network behind the firewall.
d) An attacker intentionally floods the RF spectrum with extraneous RF signal “noise” that creates interference and prevents communications.
The Correct Answer and Explanation is :
A. Why are jamming attacks generally rare?
The correct answer is d) The transmitter is not very powerful and must be close to the target.
Explanation:
Jamming attacks in wireless networks are generally rare because of several practical challenges attackers face when attempting such attacks. One of the main issues is that the transmitter used for a jamming attack is typically not very powerful. To interfere with a wireless network, the attacker must be within close proximity to the target device or access point (AP), as the strength of the RF signal diminishes with distance. This requirement makes it difficult for an attacker to disrupt a network remotely, limiting the effectiveness and scope of the jamming attack.
Additionally, to effectively jam a wireless network, the attacker needs to generate noise or interference within the same frequency range as the target network’s communication. Modern wireless networks often employ techniques like spread spectrum and frequency hopping, which make them more resistant to jamming. These defenses require sophisticated equipment to defeat, which further limits the potential for jamming attacks.
Moreover, newer IEEE amendments and enhancements in wireless communication standards, such as those introduced in 802.11 standards, have increased the security and resilience of WLANs, making them less vulnerable to interference. However, jamming attacks can still pose a risk, particularly in poorly secured or older networks.
B. Which of the following statements correctly defines jamming?
The correct answer is d) An attacker intentionally floods the RF spectrum with extraneous RF signal “noise” that creates interference and prevents communications.
Explanation:
Jamming is a form of denial-of-service (DoS) attack in wireless networks where the attacker intentionally introduces interference (often referred to as “noise”) into the radio frequency (RF) spectrum. This noise disrupts the ability of wireless devices to communicate effectively with each other. The attacker typically uses a device that transmits a powerful signal on the same frequency as the target network, overwhelming legitimate communication signals.
The goal of jamming is to create a situation where the legitimate users’ devices cannot receive or transmit data due to the interference. Unlike other attacks, such as spoofing or man-in-the-middle attacks, jamming specifically targets the physical layer of the network by flooding the airwaves with unnecessary RF signals. These signals may be continuous or pulsed to create consistent or intermittent interference.
Other options listed (a, b, and c) describe different types of attacks, such as deauthentication attacks, rogue access point (evil twin) attacks, and network infiltration via security breaches, but they are not specific to jamming. Jamming attacks focus purely on disrupting communication through interference, rather than on exploiting vulnerabilities or impersonating devices.