CompTIA Network+ (N10-009) — Question 295

Some of the 20 employees who use the wireless network report they are unable to access network resources even though the wireless network is available. An administrator recently made the following configuration changes to the wireless DHCP server:

Network: 192.168.100.0 -

Mask: 255.255.255.240 -

Gateway: 192.168.100.1 -

Which of the following is the cause of this issue?

Answer options

• A. Incorrect VLAN assignment
• B. Incorrect ACL configuration
• C. Incorrect subnet mask
• D. Incorrect default gateway

Correct answer: C

Explanation

The correct answer is C, as the subnet mask 255.255.255.240 allows for only 16 IP addresses (including the network and broadcast addresses), which might not accommodate all 20 employees needing access. The other options do not directly relate to the ability to access network resources based on the provided network configuration.