↩ 🔵 🔵 🔵 ❪✺❫ Network Concepts ○ ❪✺₁❫ Graph Classes ○ ❪✺₁❫ System Classes ○ ❪✺₁ᵢ❫ Internet Classes ○ Communication Protocol ○꠹ Computer Network ○꠹ Neural Network ○꠹