Free CompTIA Network+ N10-009 Practice Question

Changing default passwords is essential for network security as most devices come with default, often publicly known, settings which can be easily exploited by attackers. This action effectively secures access to the router configuration. Disabling unused ports helps reduce unauthorized network access but doesn't directly enhance the device’s setup security as much as altering the default credentials. Limiting bandwidth is more about managing network traffic than securing a device. Increasing signal strength does not contribute to device security and primarily affects the range and performance of wireless equipment.