Which statement is true about the most common attack against a wireless network?

• A. Unauthorized network access
• B. Wireless DoS attacks
• C. None of the above
• D. Man-in-the-middle attack using an evil twin

Answer: (A)

The main idea here is that the most frequent threat to a wireless network is someone gaining unauthorized access. In real-world wireless environments, attackers often try to connect without permission, taking advantage of weak or misconfigured authentication, default credentials, or poor passwords. Once they’re connected, they can monitor traffic, access shared resources, or use the network as a foothold to reach other systems. This scenario directly undermines the fundamental protection goal of the wireless network: controlling who can use it.

Wireless DoS attacks, while common in some contexts, aim to disrupt availability rather than gain legitimate access, and so they don’t occur as often as unauthorized connections. An evil-twin MITM requires setting up a rogue access point and convincing users to connect, which is more targeted and less common than simply breaking in. Therefore, the statement about unauthorized network access best describes the most common attack against a wireless network.