Beginner Cybersecurity
Foundations of Network Defense
Packet-level thinking for newcomers: segmentation, monitoring basics, and incident triage without drowning in jargon.
Duration: 6 weeks · 72 hours
Format: Evening cohort · hybrid
Reference tuition: ₩420,000
(KRW) — confirm in enrollment docs.
Starts: 2026-06-09
Scope
This cohort walks through realistic subnet layouts, firewall intent (allow/deny thinking), and first-response notes when alerts fire. You leave with annotated diagrams you can reuse on interviews and a short lab journal reviewers can scan quickly.
Features inside this cohort
- Live labs on VLAN sketches and east-west traffic assumptions
- Playbooks for “first 30 minutes” when an alert surfaces
- Paired mentor review of your network map portfolio piece
- English-language office hours aligned for Busan evening learners
- Capture-the-flag style drills scoped for beginners
- Reading list mapped to public vendor docs you can cite
- Shared glossary cards for acronyms that trip up junior hires
Artifacts you can show
- Produce a defensible one-page network diagram for a mock SMB
- Describe three monitoring signals you would escalate versus mute
- Submit a written triage note suitable for a junior SOC handoff
Participant voices
The Foundations of Network Defense lab packet forced me to label assumptions on every hop—something I never did when studying alone. Week four’s mentor markup on my VLAN sketch was blunt but useful.
Clear pacing. I wanted one more hour on spanning-tree edge cases, but the triage note template from week five went straight into our internal wiki.
Policy-aligned answers
Do I need prior networking certs?
No cert required. Comfort with IP addressing and basic CLI helps; we include a short primer week.
Is hardware included?
Labs run in our browser environments. A stable laptop and headphones are required; we do not ship racks.
What is not covered?
We do not teach carrier-grade backbone design or physical cabling installs.