Which of the following is NOT a function of a firewall?

Firewalls are essential components of network security, functioning primarily to manage and control network traffic based on predetermined security rules. They perform several critical roles, including monitoring network traffic, blocking unauthorized access, and logging network activity.

The primary function of monitoring network traffic involves examining data packets entering or leaving a network to ensure they comply with security policies. This allows administrators to detect potential threats or anomalies. Blocking unauthorized access is a fundamental capability of a firewall; it creates barriers that prevent illicit users or malicious software from breaching security. Additionally, logging network activity helps in auditing and analyzing traffic patterns, which is crucial for identifying security breaches and reinforcing security measures.

In contrast, enhancing wireless signal strength is not a function of a firewall. Firewalls do not alter the physical characteristics of wireless signals; instead, they focus on examining and controlling the data that traverses the network. This distinction highlights that while firewalls are vital for protecting networks, they do not contribute to the amplification or improvement of network signals, which is the role of wireless access points or signal boosters. Therefore, the choice related to enhancing wireless signal strength correctly identifies a function that falls outside the typical responsibilities of a firewall.