Cyber Communications Fundamentals · Block 3

Switching & Routing

Quick-reference cheat sheets and self-test quizzes covering LAN switching, VLANs, routing, subnetting, network diagrams, and troubleshooting.

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// Units 1 & 2
LAN Switching
& VLANs
Switch fundamentals, MAC address tables, frame forwarding, and VLAN configuration — trunk ports, tagging, and logical segmentation.
Switching VLANs Trunking
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// Units 3 & 4
Routing &
Device Layers
Static vs. dynamic routing, routing protocols, administrative distance, IP addressing, and the Core/Distribution/Access design model.
Routing Protocols Device Layers
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// Unit 5
Subnetting
Subnet masks, CIDR notation, and step-by-step subnetting math — network, broadcast, and usable host ranges.
CIDR Subnet Masks VLSM
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// Units 6 & 7
Diagrams &
Troubleshooting
Reading physical vs. logical network diagrams, plus a systematic approach to Layer 2 and Layer 3 troubleshooting.
Diagrams Layer 2 Layer 3
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// All 4 topics, plus 2 more
Comprehensive
Study Guide
Everything above in one tabbed page, plus a full Cisco CLI command reference and glossary that don't have their own page here.
All units CLI Reference Glossary
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