CCNA

June 15, 2026

Lesson 1.1h: Power over Ethernet (PoE)

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 …

June 15, 2026

Stage 1: Network Fundamentals

June 15, 2026

CCNA 200-301: Network Engineer Toolkit

Welcome to the CCNA 200-301 v1.1 learning path. Stage 1: Network Fundamentals Understand the big picture, network hardware, models, and the IPv4 and …

June 13, 2026

Lesson 1.1g: Servers

1. The Problem & Architecture Solution In a network environment, managing hundreds of disparate devices (PCs, laptops, smartphones) using a …

June 11, 2026

Lesson 1.1f: Endpoints

What is an Endpoint? Endpoints are the terminal devices that participate directly in a network as the source or destination of data traffic. They are …

June 9, 2026

Lesson 1.1e: Network Controllers

What is a Controller? In traditional networking, engineers typically configure and manage each individual device—such as routers, switches, firewalls, …

June 7, 2026

Lesson 1.1d: Access Points

An Access Point (AP) is the component that brings wireless devices into a wired LAN. If a router decides how traffic moves between networks and a …

June 5, 2026

Lesson 1.1c: Next-Generation Firewalls (NGFW) and IPS

Next-Generation Firewalls (NGFW) and Intrusion Prevention Systems (IPS) are essential components of modern network security architecture. The …

June 3, 2026

Lesson 1.1b: Layer 2 and Layer 3 Switches

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 …