Wireless Security & Troubleshooting Techniques Flashcards

Which protocol is used to secure wireless networks?

Answer: WPA2

WPA2 (Wi-Fi Protected Access II) is a robust security protocol widely used to secure wireless networks. It employs strong encryption algorithms, such as AES, and authentication methods to protect data transmitted over Wi-Fi from unauthorized access and eavesdropping. While WPA3 is newer, WPA2 remains a common and effective standard for securing most wireless networks.

What is MAC address filtering?

Answer: Allowing only authorized device addresses

MAC address filtering is a network security method that allows a network administrator to control access to a wireless network by specifying which devices are permitted to connect. Only devices whose unique Media Access Control (MAC) addresses are on an approved list will be granted access. This adds a basic layer of security by restricting unauthorized devices from joining the network.

What tool is used to analyze signal strength?

Answer: Wi-Fi analyzer

A Wi-Fi analyzer is a specialized tool, often available as a mobile app or desktop software, used to scan for wireless networks and display crucial information about them. Its primary function is to measure and visualize signal strength, identify channel congestion, and detect sources of interference. This data is invaluable for optimizing Wi-Fi network performance and troubleshooting connectivity issues.

What can reduce signal interference in Wi-Fi?

Answer: Change Wi-Fi channel

Wi-Fi networks operate on specific channels, and if multiple networks or other electronic devices in the vicinity use the same channel, signal interference can occur. Changing your Wi-Fi router to a less congested channel can significantly reduce this interference. This improves signal quality, increases data transfer speeds, and provides a more stable wireless connection.

Which is a common wireless security risk?

Answer: Open network with no encryption

An open wireless network with no encryption is a significant security risk because all data transmitted over it is completely unprotected. Anyone within range can easily intercept and read sensitive information, such as passwords, personal data, or financial details. This lack of security makes the network highly vulnerable to eavesdropping and unauthorized access.

What is the purpose of a firewall in a wireless network?

Answer: Monitors and controls traffic

The primary purpose of a firewall in a wireless network is to monitor and control network traffic based on predefined security rules. It acts as a barrier between the wireless network and external threats, preventing unauthorized access and blocking malicious data packets. This crucial security measure protects connected devices and sensitive information from cyberattacks and ensures network integrity.

Which action helps prevent unauthorized access?

Answer: Changing default password

Changing default passwords is a fundamental security practice. Default passwords are often publicly known or easily guessed, making them a significant vulnerability for unauthorized access. By replacing them with strong, unique passwords, you create a robust barrier against potential intruders, thereby enhancing network security.

What should you do if devices can’t connect to Wi-Fi?

Answer: Restart the router

Restarting the router, often referred to as power cycling, is a common and effective first step in troubleshooting Wi-Fi connectivity issues. This action can clear temporary software glitches, refresh network settings, and re-establish stable connections between devices and the network. It often resolves minor communication errors that prevent devices from connecting.

Which setting disables broadcasting the SSID?

Answer: SSID Broadcast Disable

SSID Broadcast Disable is a specific router setting designed to prevent the network's name (SSID) from being publicly advertised to devices searching for Wi-Fi networks. When disabled, the network becomes 'hidden,' requiring users to manually enter the SSID to connect. This makes the network less visible to casual snoopers, adding a layer of obscurity to network security.