Network+ N10-009 Practice Test

N10-009 practice test: what's covered

• Network+ N10-009 foundations
• DHCP/DNS
• VLANs
• Wi-Fi
• cabling
• troubleshooting

Free N10-009 sample questions

1. A lab desktop powers on, fans spin, but the screen stays blank and the machine gives a repeating memory beep code. What should the trainee check first before reinstalling Windows?

   • A. Reseat the RAM modules and confirm the motherboard memory slots
   • B. Format the system partition and install a fresh operating system
   • C. Replace the network cable between the PC and the access switch
   • D. Flush the DNS resolver cache from an administrator command prompt
   Show answer

   Correct: A. The symptom appears before the operating system loads, so the evidence points to POST hardware checks rather than Windows, DNS, or cabling. A memory beep code makes RAM seating, slot order, and module health the first check; reinstalling Windows would not fix a machine that cannot complete POST.

2. A learner says a workstation becomes very slow only after several browser tabs and a virtual lab are open, but it works normally after reboot. Which component is the most likely constraint?

   • A. Available RAM used by active applications and virtual lab processes
   • B. The RJ45 connector category printed on the Ethernet cable jacket
   • C. The default gateway IP address configured on the network adapter
   • D. The monitor refresh rate configured inside display settings
   Show answer

   Correct: A. The slowdown follows active workload growth and improves after a reboot, which points to volatile working memory pressure. Cable category, gateway settings, and display refresh can cause other symptoms, but they do not explain why opening many active programs and a lab VM consumes resources until restart.

3. During a clean Windows installation on a 4 TB SSD, the installer warns that the existing partition style is not suitable for the selected boot mode. Which partition style is normally the better fit for modern UEFI systems and large disks?

   • A. GPT because it supports UEFI boot and disks larger than 2 TB
   • B. MBR because it is required for every SSD larger than 2 TB
   • C. FAT16 because it is the partition table used by Windows setup
   • D. A crossover layout because it swaps transmit and receive pairs
   Show answer

   Correct: A. GPT is the modern partition style normally paired with UEFI and large disks. MBR has older limits around 2 TB and primary partitions, FAT16 is a file system rather than a partition table choice, and crossover cabling is unrelated to disk initialization or Windows setup.

4. A PC has IP address 192.168.10.25, subnet mask 255.255.255.0, and default gateway 192.168.10.1. It can print to a local printer at 192.168.10.50 but cannot open websites. What does this prove?

   • A. Local subnet communication works, but routing or name resolution still needs checking
   • B. The PC has no working network adapter because every packet is failing locally
   • C. The subnet mask must be 255.255.0.0 because local printing requires a WAN
   • D. The printer is acting as the DHCP server for all internet-bound traffic
   Show answer

   Correct: A. Successful communication with 192.168.10.50 proves Layer 2/3 local subnet reachability is working. Website failure could still be default gateway, upstream routing, DNS, filtering, or internet service. It does not prove the adapter is down, require a larger subnet, or make the printer the DHCP server.

5. A trainee is documenting address information from `ipconfig /all` before escalating a no-internet ticket. Which values are useful evidence for basic IPv4 troubleshooting? Select two.

   • A. IPv4 address, subnet mask, and default gateway assigned to the adapter
   • B. DNS server addresses and whether DHCP is enabled for the adapter
   • C. The monitor model number and current screen resolution
   • D. The number of files stored in the user's Downloads folder
   Show answer

   Correct: A and B. `ipconfig /all` gives addressing, gateway, DHCP, lease, MAC, and DNS details that help separate local addressing, routing, and name-resolution failures. Monitor details and local file counts do not explain why an endpoint cannot reach network resources or websites.

Last updated: 2026-10-19

N10-009 practice test FAQ