Network+ practice test: 1678 questions with full explanations

Questions on the exam

90

Time allowed

90 minutes format →

Passing score

720 of 900 — vendor, checked September 4, 2026 detail →

Exam fee

$369 — vendor, checked September 5, 2026 detail →

1678 practice test questions for CompTIA Network+, grouped by exam domain. Every question below shows all four options, which one is correct, and why each of the other three is not — the wrong answers are where most candidates lose marks.

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Questions by domain

• Network Troubleshooting — 398 questions →
• Networking Concepts — 389 questions →
• Network Implementation — 348 questions →
• Network Operations — 316 questions →
• Network Security — 227 questions →

Sample questions

Compare current configuration and scanner behavior: Which action provides the strongest next evidence about th

1. Compare current configuration and scanner behavior with the prior baseline and the maintenance record. ✓

   This combines state, observed behavior, and documented maintenance to identify and corroborate the changed condition.
2. Compare current settings with the prior baseline.

   This is useful, but it omits behavior and the maintenance record that can correlate the configuration change with the symptom.
3. Review the change ticket.

   The ticket describes planned work but does not establish the current-versus-previous configuration.
4. Compare the current scanner setting.

   One setting may miss a network change affecting scanner behavior.

All 398 Network Troubleshooting questions →

Fiber carries light without electromagnetic coupling: Which feature directly addresses that requirement?

1. Shielded copper limits electromagnetic coupling.

   Shielding reduces interference, but copper remains a conductive signaling medium.
2. Twisted pair rejects some noise.

   Twisting improves noise rejection, but the cable still carries electrical signals through the interference zone.
3. A repeater regenerates weakened signals after a long cable run.

   Regeneration addresses attenuation and timing, not copper’s susceptibility to electrical interference.
4. Fiber carries light without electromagnetic coupling. ✓

   Fiber uses light through nonconductive glass, avoiding electromagnetic interference and ground-potential issues.

All 389 Networking Concepts questions →

Longest matching prefix: Which route-selection principle determines the chosen entry?\n\n```text\nRoute Next h

1. Protocol metric

   Metrics select among routes within a protocol, not between different destination prefix lengths in forwarding.
2. Longest matching prefix ✓

   10.20.30.44 matches both /16 and /24, but /24 is more specific, so longest-prefix forwarding selects it first.
3. Administrative distance

   Administrative distance compares route sources for the same prefix; it does not override a more specific installed prefix.
4. Default-route preference

   The default route matches broadly but is used only when no more specific installed route matches the destination.

All 348 Network Implementation questions →

Physical network diagram: Which documentation is most appropriate?

1. Physical network diagram ✓

   A physical diagram traces hardware locations and cabling paths, directly supporting the requested connectivity investigation.
2. Configuration baseline

   A configuration baseline records approved device settings but does not map installed hardware and cable paths.
3. Logical network diagram

   A logical diagram shows protocols, VLANs, and subnets rather than the physical cable and hardware paths requested.
4. IP address allocation table

   An address table records assignments and subnets but cannot show cable routes or equipment placement.

All 316 Network Operations questions →

TLS for browser traffic: Which feature directly satisfies the requirement?

1. WPA3 wireless access

   WPA3 protects a wireless local-area connection, not the browser session across untrusted networks.
2. TLS for browser traffic ✓

   TLS protects the browser application session with confidentiality and integrity across untrusted networks.
3. Full-disk encryption

   Full-disk encryption protects stored data on devices, not data while it traverses networks.
4. IPsec tunnel across untrusted networks

   IPsec can protect network-layer traffic, but the requirement specifically calls for securing the browser application session without a network tunnel.

All 227 Network Security questions →

Test one variable on the isolated terminal during: Which approach reproduces the issue safely?

1. Disable switching safeguards across the branch during the approved test window.

   Removing safeguards expands risk and is unnecessary when an isolated terminal is available.
2. Change wireless channels and firmware together during business hours.

   Simultaneous production changes increase impact and obscure which change affected disconnects.
3. Test one variable on the isolated terminal during the approved window. ✓

   An authorized, isolated, single-variable test limits impact and preserves causal clarity.
4. Reset every point-of-sale device before testing.

   A broad reset can disrupt operations and changes multiple device states without confirming the cause.

All 398 Network Troubleshooting questions →

A MAC address identifies the network interface: Which addressing feature provides that local-link identificati

1. An IP address identifies the device’s logical network location.

   IP identifies logical Layer 3 locations and supports routing, but it is not the local Ethernet interface identifier.
2. A TCP port identifies the receiving application process.

   TCP ports distinguish application endpoints after delivery reaches a host, not the local interface itself.
3. A MAC address identifies the network interface on the local link. ✓

   Ethernet uses MAC addresses to identify interfaces for delivery across the local data-link segment.
4. A DNS name provides a human-readable name for network resolution.

   DNS names resolve through a service and do not directly identify an Ethernet interface on the local link.

All 389 Networking Concepts questions →

A default route with a zero-length network prefix: Which route feature directly satisfies this requirement?

1. A default route with a zero-length network prefix ✓

   A 0.0.0.0/0 route matches any IPv4 destination not covered by a more specific installed route.
2. A floating static route with a higher preference value

   A floating static route provides backup selection, but its prefix still determines which destinations it can match.
3. A virtual gateway address shared by redundant routers

   A virtual gateway improves first-hop availability but does not itself define routes for otherwise unknown destinations.
4. A host route with a thirty-two-bit prefix

   A /32 route matches only one IPv4 destination and cannot provide catch-all forwarding for unknown networks.

All 348 Network Implementation questions →

Network+ exam: the facts

How many questions are on the Network+ exam?

90, as published by the exam vendor.

How long is the Network+ exam?

90 minutes. Across 90 questions that is about 60 seconds per question.

What topics does the Network+ exam cover?

5 domains: Network Troubleshooting, Networking Concepts, Network Implementation, Network Operations, Network Security. Weights: Network Troubleshooting 0.24%, Networking Concepts 0.23%, Network Implementation 0.2%, Network Operations 0.19%, Network Security 0.14%.

How many Network+ practice test questions does Certsqill have?

1678, spread across 5 exam domains. Every one shows all options, which is correct, and why each of the others is not.