N10-009 Free Practice Questions — Page 11 (2026)

Question 101

Which of the following is most closely associated with having a leased line to a public cloud provider?

A. VPN

B. Direct Connect

C. Internet gateway

D. Private cloud

Show Answer

Correct Answer: B

Explanation:
A leased line to a public cloud provider refers to a dedicated private network connection rather than connectivity over the public internet. Services such as AWS Direct Connect (and analogous offerings like Azure ExpressRoute or Google Cloud Interconnect) provide this dedicated connection. A VPN uses the internet, an internet gateway enables internet access for cloud resources, and a private cloud is a deployment model rather than a leased-line service.

Question 102

Which of the following record types does an IP-to-name lookup use in DNS?

A. NS

B. PTR

C. A

D. CNAME

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Correct Answer: B

Explanation:
A reverse DNS lookup maps an IP address to a hostname using a PTR (Pointer) record. An A record maps a hostname to an IPv4 address, NS identifies authoritative name servers, and CNAME provides an alias to another hostname.

Question 103

A technician configures a new printer and places it on the network. Which of the following is the best way to ensure the printer will always keep the same IP configuration?

A. Add a new scope.

B. Place an exclusion.

C. Extend the lease time.

D. Create a reservation.

Show Answer

Correct Answer: D

Explanation:
A DHCP reservation binds the printer's MAC address to a specific IP address so it consistently receives the same IP configuration. A new scope creates a different address pool, an exclusion only prevents DHCP from assigning certain addresses, and extending the lease time does not guarantee the address will never change.

Question 104

Which of the following stages of the troubleshooting methodology involves considering multiple approaches?

A. Verify full functionality.

B. Implement the solution.

C. Document the findings and actions.

D. Establish a theory of probable cause.

Show Answer

Correct Answer: D

Explanation:
In the CompTIA troubleshooting methodology, 'Establish a theory of probable cause' is the stage where you consider multiple possible explanations for the issue, including questioning the obvious. Brainstorming and evaluating different potential causes occurs before testing the theory and implementing a solution.

Question 105

A network technician is configuring the company's network 100Mbps port Layer 2 switches. The technician wants increased throughput for the uplinks between switches. The technician connects multiple redundant links between the switches. Which of the following should the technician configure?

A. Spanning Tree Protocol

B. Switch Virtual Interfaces

C. Native VLAN

D. First Hop Redundancy Protocol

Show Answer

Correct Answer: A

Explanation:
The intended technology for increasing throughput across multiple redundant switch links would normally be link aggregation (EtherChannel/LACP), but that option is not provided. Of the available choices, Spanning Tree Protocol is the only relevant Layer 2 feature for redundant inter-switch links because it prevents switching loops. The other options (SVIs, Native VLAN, and FHRP) do not increase inter-switch uplink throughput or manage redundant Layer 2 links.

Question 106

Which of the following will a router prioritize first in the route selection process?

A. Prefix length

B. Metric

C. Administrative distance

D. Default route

Show Answer

Correct Answer: A

Explanation:
Routers first perform longest-prefix matching. The most specific matching route (largest prefix length) is selected before considering administrative distance or metric. Administrative distance is only compared among routes to the same destination prefix from different sources, and metrics are compared within the same routing protocol. A default route is used only if no more specific match exists.

Question 107

A network administrator is creating a copy of network traffic for later analysis. The flow of traffic should not be changed. Which of the following will most directly accomplish this task?

A. SPAN port

B. Network tap

C. Protocol analyzer

D. Link aggregation

Show Answer

Correct Answer: B

Explanation:
A network tap is purpose-built to passively duplicate network traffic for monitoring or later analysis without altering the traffic flow. A SPAN port mirrors traffic but can miss packets under load and is switch-dependent. A protocol analyzer captures/analyzes traffic but does not itself create the copy. Link aggregation combines links for bandwidth/redundancy, not traffic duplication.

Question 108

A network engineer added more APs to improve wireless coverage. However, users now report that the connectivity disconnects and reconnects repeatedly. Which of the following is causing the issue?

A. Throughput capacity

B. Roaming misconfiguration

C. Channel overlap

D. Packet loss

Show Answer

Correct Answer: C

Explanation:
Adding more access points without proper channel planning can create co-channel or adjacent-channel interference. Overlapping channels increase interference, leading to unstable wireless connectivity where clients repeatedly disconnect and reconnect. Roaming misconfiguration can cause roaming issues, but the direct consequence of simply adding more APs is most commonly channel overlap.

Question 109

A network technician is working on a PC with a faulty NIC. The host is connected to a switch with secured ports. After testing the connection cables and using a known good NIC. the host is still unable to connect to the network. Which of the following is causing the connection issue?

A. MAC address of the new card

B. BPDU guard settings

C. Link aggregation settings

D. PoE over power budget

Show Answer

Correct Answer: A

Explanation:
On a switch with port security enabled, the switchport may be configured to allow only a specific learned or configured MAC address. Replacing the NIC changes the host's MAC address, so the secured port can block traffic from the new NIC until the port security configuration is updated or the secure MAC is relearned. BPDU guard affects switches sending BPDUs, link aggregation is unrelated to a single host NIC replacement, and PoE budget does not affect a typical PC NIC connection.

Question 110

A network engineer is installing new PoE wireless APs. The first five APs deploy successfully, but the sixth one fails to start. Which of the following should the engineer investigate first?

A. Signal strength

B. Duplex mismatch

C. Power budget

D. CRC

Show Answer

Correct Answer: C

Explanation:
The most likely cause is exhaustion of the switch's PoE power budget. If the first five access points successfully powered on and the sixth does not start, the switch may have reached its maximum available PoE wattage, preventing additional devices from receiving sufficient power. Signal strength, duplex mismatch, and CRC errors would not prevent an AP from initially powering on.