Understand the big picture, network hardware, models, and the IPv4 and IPv6 address spaces.
June 15, 2026
1. What is PoE? Power over Ethernet (PoE) is a technology that allows network cables to carry electrical power (DC) alongside data over a single twisted-pair Ethernet cable, such as Cat5e or Cat6. Thanks to PoE, …
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June 3, 2026
1. Layer 2 Switch Operations 1.1 Overview of Layer 2 Switches A Layer 2 Switch is a network device that operates primarily at Layer 2 — Data Link …
June 1, 2026
A Router is a network device that operates primarily at Layer 3 (Network Layer) of the OSI model. The primary function of a router is to connect …