📖 13. Wired LANs: Ethernet
📖 From Data Communication and Networks • 211 questions available
About 13. Wired LANs: Ethernet
Ethernet dominates wired local area networking through a family of standards evolving from 10 Mbps shared coaxial bus to multi-gigabit switched fiber architectures. The IEEE 802.3 specification defines frame formats, MAC addressing, auto-negotiation, and physical layer variants, maintaining backward compatibility while scaling speed through innovations like 4D-PAM5 encoding, lane aggregation, and forward error correction, making it the universal plug-and-play LAN technology for enterprises and homes alike.
Modern Ethernet operates almost exclusively in full-duplex switched mode, eliminating collisions and enabling simultaneous bidirectional communication at line rate through dedicated switch ports. Features like Power over Ethernet (PoE), Energy Efficient Ethernet (EEE), and time-sensitive networking extensions demonstrate its adaptability beyond pure data transport, supporting IoT sensors, IP cameras, and industrial automation within a single converged infrastructure that continues to evolve toward terabit speeds.
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🔄 Last updated: 2026-08-01