Foundational subnetting math · ~5 min · click any lesson in the sidebar to jump around.
Score0 / 0Streak🔥 0Time60
Q1
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📖 Quick Reference
CIDR
Mask
Hosts
Block
/8
255.0.0.0
16,777,214
16,777,216
/16
255.255.0.0
65,534
65,536
/20
255.255.240.0
4,094
4,096
/22
255.255.252.0
1,022
1,024
/24
255.255.255.0
254
256
/25
255.255.255.128
126
128
/26
255.255.255.192
62
64
/27
255.255.255.224
30
32
/28
255.255.255.240
14
16
/29
255.255.255.248
6
8
/30
255.255.255.252
2
4
Muscle memory · fast feedback
Interactive drills.
Drills for the rote parts of Network+ — muscle memory and tool-recognition. Pick one.
Network analysis tools · CompTIA Domain 5.5
Network analysis.
tcpdump, Wireshark, Nmap, and output reading. The tools that trip people up most.
Performance-based question · ACL Ordering
Firewall order.
Drag rules into priority order, then send test traffic to verify. Real exam format.
Drill · 27 protocols
Port mastery.
Beginner
🔌
Start Lesson 1
Foundational port-protocol pairings · ~5 min · click any lesson in the sidebar to jump around.
Score0 / 0Streak🔥 0Time30
Q1
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📖 Port Reference · All 40 ports
Drill · 110 acronyms
Acronym blitz.
Beginner
💡
Start Lesson 1
Foundational networking acronyms · ~5 min · click any lesson in the sidebar to jump around.
Score0 / 0Streak🔥 0
Q1
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Drill · 7 layers
OSI sorter.
Beginner
🌐
Start Lesson 1: Layers 1 & 2
Foundational OSI model · ~5 min · click any lesson in the sidebar to jump around.
Score0 / 0Streak🔥 0
Drill · cables & connectors
Cable ID.
Beginner
🔌
Start Lesson 1: Cat5e/6/6A
Foundational cable types · ~5 min · click any lesson in the sidebar to jump around.
Score0 / 0Streak🔥 0
Q1
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Signals · readiness & trends
Performance analytics.
Recent Performance
Complete at least one quiz to see your analytics.
Account · configuration
Your settings.
§ 01
Study setup
Goals, exam date, and at-a-glance status — the inputs that shape your daily study cadence.
Study setup health at a glance
Exam Date
Powers the days until exam countdown on Home + Analytics, and the red marker cell on the 365-day study heatmap. Set it — keep your study pressure honest.
Daily Goal
questions per day
The count behind the "Today" card on your home page. Aim for something you can hit every day without burning out.
§ 02
AI coach
Anthropic API connection. Stored in your browser only — never sent to any other server.
Anthropic API Key
Stored in your browser only. Used only to call the Anthropic API. Auto-saves as you type.
§ 03
Data & backups
Export to disk, import a JSON snapshot, or roll back to a recent automatic backup.
Manual export & import
Exports all quiz history, streaks, drill stats, topology saves, and ACL state to a JSON file. Import merges into your current local data.
Automatic backups
Daily rolling snapshots of every progress key in your browser. Kept for the last 7 days plus any pre-restore safety snapshots. Restore rolls back ALL of your data to that day's state — current state is auto-snapshotted first so you can roll forward again.
No automatic backups yet — one will be created on your next page load.
§ 04
Danger zone
Destructive actions. Cannot be undone via Edit menu — only via Automatic Backups in § 03.
Wrong Answers Bank
Removes all saved mistakes. The "Drill Mistakes" preset on the home page fires a drill quiz from this bank.
Study \u00b7 deep dive
Topic deep dive.
Generating topic guide…
Lab \u00b7 hands-on CLI
Guided terminal lab.
Sandbox · design & simulate
Network builder.
0 / 50 devices
💻
Topology Builder works best on a desktop
Drag and drop + precise cable wiring don’t translate well to small screens. Grab a laptop or external monitor for the best experience.
Network design · sandbox
Topology builder.
Retained only for v4.54.4 UAT regression checks; actual header now renders inside .tb-palette-v3 as .tb-pane-head.