How to Pass CompTIA Network+ N10-009 PBQs (What Actually Works in 2026)

The CompTIA Network+ N10-009 exam has a reputation: multiple-choice questions test what you know, but performance-based questions (PBQs) test whether you can actually do the job. Most candidates spend 90% of their study time on the knowledge side and almost none on the hands-on side. Then they sit down for the exam and hit the first simulation — a drag-and-drop cable scenario or a subnet calculation grid — and freeze.

This guide covers every PBQ type that appears on N10-009, what the exam actually asks you to do, and the preparation method that converts study time into passing scores.

1. What Are PBQs and How Many Are on N10-009?

Performance-based questions are interactive simulations that appear at the beginning of the exam. Unlike multiple-choice questions, you have to do something — drag and drop components, fill in a subnet table, configure a switch, or identify the faulty device in a network diagram.

On N10-009, you can expect 3–6 PBQs at the start of the exam, before the multiple-choice questions begin. CompTIA doesn't publish an exact count — it varies per exam form. But budget 20–30 minutes for PBQs when planning your time.

The good news: Network+ PBQs are more formulaic than Security+ PBQs. There are clear categories, and once you've practiced each type, you'll recognize what you're looking at within 10 seconds of the scenario loading.

2. The 6 PBQ Types on Network+ N10-009

Every PBQ type on the current N10-009 exam falls into one of these categories:

These six types cover the vast majority of PBQs on N10-009. If you can handle each type confidently, you walk into the exam knowing there are no surprises.

3. Subnetting PBQs: The Most Common Fail Point

Subnetting trips up more Network+ candidates than any other PBQ type. Not because it's conceptually hard — the math is fixed and learnable — but because candidates either skip it in study or only practice it in calculator mode (where the tool does the work).

On the exam, you do not get a subnet calculator. You get a table and a pencil icon. Here's the framework that works under time pressure:

The 3-Column Method

For any subnet question, build this in the notepad provided:

1. Network address — given in the problem
2. Subnet mask / CIDR — determine from host count requirement (use 2^n − 2 ≥ required hosts)
3. Usable range — network address + 1 through broadcast − 1

The CIDR shortcuts you need memorized cold:

• /24 → 254 hosts | mask: 255.255.255.0
• /25 → 126 hosts | mask: 255.255.255.128
• /26 → 62 hosts | mask: 255.255.255.192
• /27 → 30 hosts | mask: 255.255.255.224
• /28 → 14 hosts | mask: 255.255.255.240
• /29 → 6 hosts | mask: 255.255.255.248
• /30 → 2 hosts | mask: 255.255.255.252

Practice subnetting until you can calculate a /27 subnet's usable range from a given network address in under 90 seconds without any tools. That's the target speed for the exam.

4. Network Topology and Troubleshooting PBQs

Topology PBQs are usually the easiest on the exam — if you know the definitions. The key is being able to look at a diagram and immediately recognize the pattern:

• Star: All devices connect to a central switch/hub. Most common in modern LANs. Single point of failure at the switch.
• Mesh (full): Every device connects to every other device. Highest redundancy. Used in WAN links and critical infrastructure.
• Mesh (partial): Some but not all devices have redundant paths. Common in real-world enterprise networks.
• Bus: All devices connect to a single shared backbone. Legacy topology. Single point of failure along the cable.
• Ring: Each device connects to exactly two others in a loop. Legacy (Token Ring). Still tested on N10-009.

Troubleshooting PBQs use the OSI model as the diagnostic framework. When presented with a connectivity issue, work from Layer 1 up:

1. Layer 1 (Physical) — Check for cable failures, wrong port, bad connector, distance exceeded
2. Layer 2 (Data Link) — Check for VLAN misconfiguration, MAC address table issues, duplex mismatch
3. Layer 3 (Network) — Check IP addressing, subnet mask, default gateway, routing
4. Layer 4+ — Check firewall rules, port blocks, application issues

5. Cable Selection and Physical Layer PBQs

Cable and connector selection PBQs test whether you know when to use which physical medium. The most tested combinations:

• Cat5e: Up to 1 Gbps, 100m. Older runs still in use. Adequate for most office needs.
• Cat6: Up to 10 Gbps (at 55m), 1 Gbps at 100m. Current standard for new installations.
• Cat6a: Up to 10 Gbps at full 100m. Best choice when 10GbE backbone is required.
• Single-mode fiber (SMF): Long distances (kilometers), used for building-to-building or campus backbone. Uses LC or SC connectors.
• Multi-mode fiber (MMF): Shorter distances (up to ~550m for 10GbE), lower cost than SMF. Common in data center vertical cabling.
• Coaxial (RG-6): Cable TV / DOCSIS internet. Not used for new network installations.
• Twinaxial (DAC): Direct-attach copper for very short-distance 10GbE+ connections (rack-to-rack, under 5m).

Connector matching is also tested. Know these cold:

• RJ45 — twisted pair (Cat5e/6/6a)
• LC — small form factor fiber (most common in modern installs)
• SC — square fiber connector (older installs)
• ST — bayonet-style fiber (very legacy)
• BNC — coaxial
• F-connector — coaxial (CATV / DSL)

6. Switch and Router Configuration PBQs

Switch configuration PBQs present a simulated CLI or GUI and ask you to complete a task. The most common tasks on N10-009:

VLAN Assignment

Create a VLAN and assign a port to it. The commands you need to know (Cisco IOS-style, which the exam models):

• vlan [id] — create VLAN
• name [name] — assign name to VLAN
• interface fa0/[port] — select port
• switchport mode access — set as access port
• switchport access vlan [id] — assign to VLAN

IP Address Assignment

Assign an IP address to a router interface or switch management VLAN:

• interface vlan [id] or interface gi0/0
• ip address [ip] [mask]
• no shutdown — critical step most candidates forget

Port Speed and Duplex

Sometimes tested as a troubleshooting scenario (duplex mismatch causing collisions). Know how to set:

• duplex full
• speed 100 (or 1000)

7. Wireless PBQs

Wireless PBQs typically present a scenario (office environment, high-density venue, outdoor campus) and ask you to select the correct wireless standard, band, and security settings.

Wireless Standards — Know These

• 802.11ac (Wi-Fi 5): 5 GHz only, up to 3.5 Gbps theoretical. Current standard for most deployments.
• 802.11ax (Wi-Fi 6/6E): 2.4/5/6 GHz, higher efficiency in dense environments. Best for high-density scenarios on the exam.
• 802.11be (Wi-Fi 7): Emerging standard — may appear on updated exam forms.
• 802.11n (Wi-Fi 4): 2.4 and 5 GHz, up to 600 Mbps. Legacy but still deployed.

Frequency Band Selection

• 2.4 GHz: Longer range, fewer non-overlapping channels (only 3 in the US: 1, 6, 11), more interference. Use when range matters more than speed.
• 5 GHz: Shorter range, 25 non-overlapping channels, faster. Use in medium-density environments.
• 6 GHz (Wi-Fi 6E): New spectrum, very low interference, high capacity. Best for high-density modern deployments.

Security Protocols

• WPA3-Enterprise: Best option for corporate networks. Always select this when a corporate/enterprise scenario is described.
• WPA3-Personal: Best for home/small office.
• WPA2: Still widely used; acceptable answer when WPA3 isn't an option.
• WEP / TKIP: Never select these. They are deprecated and insecure. If they appear as options, they are wrong.

8. Exam Strategy: How to Handle PBQs Under Pressure

You have 90 minutes for up to 90 questions on N10-009. PBQs are worth more points than multiple-choice questions but take longer. Here's the strategy that works:

1. Flag PBQs, do multiple-choice first. Mark each PBQ and move past it. Complete all of the multiple-choice questions — they're faster and each is worth points. Then return to PBQs with the time remaining.
2. Read the scenario carefully before touching anything. PBQ interfaces are interactive — clicking the wrong thing can change state. 30 seconds reading beats 3 minutes undoing.
3. Identify the PBQ type immediately. Subnetting table? Cable drag-and-drop? CLI? Once you know which type it is, your brain shifts into the right mode. Don't start working until you know what you're solving.
4. Use the on-screen notepad for subnetting. Write out your 3-column table. Don't try to do subnet math in your head under time pressure.
5. When stuck, make your best choice and move on. An unanswered PBQ scores zero. A guess might score partial credit. Always submit an answer.

9. The Fastest Way to Prepare

Reading about PBQ types is the starting point. Practicing the actual scenarios is what builds the pattern recognition that makes PBQs fast on exam day.

The most efficient preparation path:

1. Memorize the subnetting chart. All CIDR prefixes from /24 to /30, mask, and usable host count. Drill this until it's instant recall.
2. Practice CLI commands by writing them out. You don't need a live Cisco switch — write the exact sequence of commands for VLAN creation, IP assignment, and interface activation from memory, then check against reference material.
3. Draw network diagrams by hand. Practice identifying topology types from a glance. Draw a star, mesh, ring, and bus topology. Know the single point of failure in each.
4. Work through structured lab scenarios. The most efficient way to cover all PBQ types systematically is a dedicated lab guide that steps through each scenario type with worked examples.

What to Prioritize (Time-Constrained Study)

If you have limited study time before the exam, prioritize in this order:

1. Subnetting — highest frequency, most points lost per mistake
2. Switch CLI basics (VLAN + IP + no shutdown) — shows up consistently
3. Cable selection — fast to learn, minimal practice needed
4. Wireless standards + security — memorize the decision table above
5. Topology identification — easiest, lowest time investment needed

The candidates who fail Network+ PBQs aren't lacking knowledge — they're lacking practice under exam conditions. The multiple-choice section rewards knowing definitions. PBQs reward having done the work. There's no shortcut, but the preparation is straightforward: know the types, practice the scenarios, build the speed.