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Level 0: Absolute IT and Networking Basics

This page exists so the roadmap truly starts from zero. No Cisco command is useful until the basic language of computers, networks, IP addresses, ports, and troubleshooting is clear.

# Goal

Level 0 pass condition: I can explain a small network, assign IP addresses, test connectivity, use basic Windows and Linux commands, and document one broken-network ticket without guessing.

# Full Checklist

Computer and OS basics Foundation
Internet and network basics Foundation
Survival commands Hands-on
Mini labs Proof

# Move Forward Gate

Before CCSTI must be able to prove
ExplainIP, DNS, DHCP, gateway, router, switch, firewall, port, protocol.
Use commandsRun ping, ipconfig, nslookup and traceroute, then explain the result.
FixOne broken IP or DNS ticket with root cause and verification.
DocumentWrite a simple ticket note: symptom, checks, fix, proof.