Subnetting Bootcamp
What you must be able to do by the end of this week is listed below. Complete lessons, labs, interactive tools, and the assessment checkpoint.
Subnetting speed — CIDR, ranges, wildcards, and VLSM
5 study days · ~8h 15m total · most sessions target ~90 minutes
Key topics
Videos
- primaryJeremy's IT LabDuration TBDSubnetting Mastery Part 1 — Seven Attributes
- reinforcementDavid BombalDuration TBDBinary — How Does That Work? (Video #13)
Further study
Interactive tools
Practice
Complete lesson: Subnetting Mental Model — do 5 /24 splits on paper.
Quick review
Given /26, state mask in dotted-decimal without a calculator.
Week checkpoint
Pass Subnetting Gate 1 at 80%+ with timed CIDR drills.
Suggested practice
Subnetting gate at /tools/subnetting?mode=gate
Week study guides
Week tools
Week objectives
- Convert CIDR to subnet mask
- Find network/broadcast/usable range
- Calculate hosts
- Understand wildcard masks
- Begin VLSM
Lessons
Training videos
Jeremy's IT Lab lectures (also embedded in lessons) plus supplemental videos from the Free CCNA 200-301 course playlist. Watch in order or jump to the topic you are studying.
Lesson pages embed Jeremy's IT Lab videos inline. Supplemental David Bombal videos from the linked playlist appear here and in matching lessons — all credited to their respective channels.
Interactive tools
Labs & review
Labs
Lab content coming in Phase 2/3
Assessment
week2-subnetting-gate — original concept-based questions only.
Subnetting Gate 1
Score 80%+ on 25 questions and complete 10 timed CIDR drills.