What is a significant security issue associated with Open Wi-Fi?

Open Wi-Fi networks are characterized by the absence of encryption, which creates a significant vulnerability concerning data security. When users connect to an open Wi-Fi network, any data transmitted over that network can potentially be intercepted by malicious actors. Since the data is not encrypted, it is easy for unauthorized users to capture sensitive information, such as passwords, personal messages, and financial details. This lack of protection is a primary reason why open networks are often considered risky for any activity that involves the exchange of sensitive or personal information.

In contrast, the other options do not accurately represent security issues specific to open Wi-Fi. For instance, the high cost of installation is not typically associated with open networks, as they are often set up to be easily accessible without significant investment. The claim about data being encrypted is misleading in this context; open Wi-Fi lacks encryption, which contributes to its security risks. Lastly, the speed of connections is not inherently related to the security features of the network and can vary widely based on numerous factors unrelated to encryption.