CompTIA Network+ Practice Test for Subdomain 5.4 #03

Welcome to today’s CompTIA Network+ practice test!

This practice test uses our new UI!

Today’s practice test is based on Subdomain 5.4 (Given a scenario, troubleshoot common performance issues) from the CompTIA Network+ N10-009 objectives.

This beginner-level practice test is inspired by the CompTIA Network+ (N10-009) exam and is designed to help you reinforce key networking concepts on a daily basis.

These questions are not official exam questions, nor are they brain dumps, but they reflect topics and scenarios relevant to the Network+ certification. Use them to test your knowledge, identify areas for improvement, and build daily cybersecurity habits.

Note: CompTIA and Network+ are registered trademarks of CompTIA. This content is not affiliated with or endorsed by CompTIA.

To choose CompTIA Network+ practice tests based on specific domains/subdomains, click that link.

CompTIA Network+ Practice Test of the Day 260707

10 questions • Single best answer

Question 1

A NOC engineer at a managed service provider receives client complaints that VoIP calls are choppy and difficult to understand. A packet capture confirms voice packets are arriving but with highly inconsistent delivery intervals. What is the cause of the poor call quality?

A. Excessive packet loss due to WAN link congestion B. Insufficient bandwidth on the uplink to the voice gateway C. Excessive jitter causing variable packet delivery timing D. High latency introduced by a misconfigured QoS policy

Question 2

A wireless network engineer at a hospital receives reports of slow Wi-Fi and frequent disconnections in a high-density patient ward. A Wi-Fi analyzer confirms multiple APs in the area are using overlapping channels in the 2.4GHz band. What is the cause?

A. Access points are operating at insufficient transmission power B. Clients are failing to roam between APs due to sticky client behavior C. The SSID is not available on the 5GHz band in the affected area D. Channel overlap between adjacent APs is causing co-channel interference

Question 3

A network administrator at a media company finds that large file transfers between a production workstation and a file server consistently cap at 100 Mbps, even though both endpoints have gigabit NICs and the switch supports gigabit speeds. What is the most likely cause?

A. An intermediate link in the path is operating at 100 Mbps, creating a bottleneck B. The file server NIC is operating in half-duplex mode, limiting throughput C. A QoS policy on the switch is throttling file transfer traffic D. TCP congestion control is reducing throughput due to packet loss

Question 4

A SOC analyst at a logistics company reviews performance data and notices TCP retransmission rates spiking on the WAN link between headquarters and a major distribution center. Interface counters show no errors and utilization is below 80%. What is the most likely cause?

A. Excessive jitter on the WAN link is causing out-of-order TCP segment delivery B. Packet loss on the WAN link is triggering TCP retransmission C. WAN link latency exceeds acceptable thresholds for TCP session efficiency D. Bandwidth congestion is causing QoS to drop high-priority traffic

Question 5

A wireless survey team at a university library finds that users in the far corners of the building consistently report poor signal, low throughput, and frequent disconnections compared to users near the center of the floor. What is the most likely cause?

A. APs are using directional antennas that exclude the building perimeter B. Co-channel interference between APs is reducing signal levels at the edges C. Wireless coverage does not adequately reach the perimeter of the building D. Client devices do not support the 6GHz band configured on the APs

Question 6

A financial trading desk using a cloud-hosted application reports sluggish response times during market hours. Packet captures confirm all data is arriving intact, and round-trip times between clients and the cloud environment consistently exceed 200ms. What is the cause?

A. Bandwidth saturation on the internet uplink is intermittently dropping packets B. The application's TCP window size is not optimized for the network path C. Packet loss is generating retransmissions that appear as slow response times D. Network latency is increasing round-trip time between clients and the cloud application

Question 7

A wireless engineer at a large warehouse receives reports from workers using handheld scanners that devices drop connectivity when moving between coverage zones. A site survey confirms adequate signal strength exists throughout the entire facility. What is the most likely cause?

A. Roaming is misconfigured, preventing smooth client handoff between access points B. Adjacent access points are using overlapping non-overlapping channels C. The scanners do not support the encryption standard configured on the APs D. Co-channel interference is causing intermittent client disassociation in overlap zones

Question 8

A network engineer at a media company finds that user application performance degrades during business hours when automated backup jobs run between file servers. Interface counters show no errors and individual links remain below 100% utilization. What is the cause?

A. Backup-induced jitter is disrupting latency-sensitive user sessions B. Backup traffic is competing with user traffic for the same link bandwidth C. The backup server is transmitting oversized frames being dropped by the switch D. An ACL is throttling backup flows, causing TCP retransmissions that consume bandwidth

Question 9

A wireless administrator at a corporate campus receives reports that laptops randomly drop Wi-Fi for a few seconds before reconnecting. A packet capture reveals periodic deauthentication frames being transmitted to client devices. What is the most likely cause?

A. APs have insufficient transmit power, causing clients to seek better signals prematurely B. Channel overlap between neighboring APs is triggering client disassociation C. A rogue AP or wireless attack is sending deauthentication frames to clients D. The wireless controller's roaming threshold is configured too aggressively

Question 10

An IT analyst at a government agency installs a wireless AP on a floor with thick concrete walls and metal equipment racks. Users near the AP report strong signal but devices 15 meters away show levels below -75 dBm and poor throughput. What is the cause?

A. A nearby AP is causing co-channel interference at the edges of coverage B. The AP's transmit power is set too high, causing near-field saturation C. Client devices are falling back to the 2.4GHz band due to 5GHz unavailability D. Physical obstructions between clients and the AP are causing signal degradation

CompTIA Network+ Practice Test for Subdomain 5.4 #03

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