Networking Configuration and the N10-006 Net+ Exam

Can you spot incorrect networking configuration settings such as an incorrect IP address, subnet mask, default gateway, or DNS server setting?

You should if you plan to take the N10-006 Network+ exam. You can expect to see networking configuration settings questions as performance-based questions and/or multiple choice questions. 

Note: I recently added some new questions including new performance-based questions to the Network+, CASP, and Security+ practice test banks. The "What's New" page lists additions for all the test banks on the gcgapremium.com site.

Check out this partial networking configuration diagram. It shows four users (Homer, Lisa, Bart, and Marge) and some servers, all in separate subnets.

Is Bart's Networking Configuration Correct?

Bart is complaining that he can't connect to any servers in the network. You need to find out why so you check his networking configuration as shown in the following graphic.

 Is this correct?

If not, what is wrong with this picture?

The answer is below.

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Networking Configuration and the Network+ Exam

The correct configuration for Bart’s computer is:

• Subnet mask: 255.255.255.0
• Default gateway: 10.80.3.1
• DNS: 10.80.5.24

Subnet mask: The currently configured subnet mask is set to 255.255.255.128, which is incorrect. It should match the subnet mask of the default gateway, which is /24 (or 255.255.255.0).

Default gateway: The default gateway is the IP address of the router interface for the network. It is labeled F0/3 and the table shows that F0/3 has an IP address of 10.80.3.1/24.

DNS: The address of the Domain Name System (DNS) server is 10.80.5.10/24, as identified in the diagram.