Sublevel · Learner
Network and security vocabulary become second nature.
0/4 lessons
Industry anchor
Why these? →CompTIA Network+MS-900 Microsoft 365 Fundamentals
- ▸IP (Internet Protocol) addressing, subnetting, DNS (Domain Name System), DHCP (Dynamic Host Configuration Protocol)
- ▸OSI (Open Systems Interconnection) model and common protocols
- ▸Switching & routing fundamentals
- ▸M365 (Microsoft 365) tenant administration
Lessons · click to open
Lesson 114 min
Open →TCP (Transmission Control Protocol)/IP and the OSI model — for real
Seven layers, four practical ones. What lives at L2 vs L3, why it matters when you troubleshoot.
Lesson 212 min
Open →DNS — the phone book of the internet
A/AAAA, CNAME (Canonical Name record), MX (Mail Exchange record), TXT, NS. TTL (Time To Live). Recursive vs authoritative. Why nslookup beats opinion.
Lesson 312 min
Open →DHCP and just-enough subnetting
Scopes, reservations, options. /24, /23, /22 — what you actually need to know.
Lesson 412 min
Open →Security+ vocabulary, fast
CIA (Confidentiality, Integrity, Availability) triad, AAA, least privilege, defense in depth, phishing.
Rank challenge
Take the Learner quiz
8 questions. Pass at 70% to unlock the next basecamp.