CompTIA Network+ (N10-009) — Question 66

A systems administrator is configuring a new device to be added to the network. The administrator is planning to perform device hardening prior to connecting the device. Which of the following should the administrator do first?

Answer options

• A. Update the network ACLs.
• B. Place the device in a screened subnet.
• C. Enable content filtering.
• D. Change the default admin passwords.

Correct answer: D

Explanation

Changing the default admin passwords should be the first step in device hardening to prevent unauthorized access. Updating network ACLs, placing the device in a screened subnet, and enabling content filtering are important steps, but they become less effective if the default credentials remain unchanged, leaving the device vulnerable.