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Concise explanations of key technical topics found on Cisco's® CCNA™, CCNP™, and CCIE™ exams
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Author: Leigh Anne Chisholm & Mike Sweeney

Focus: CCNA, Switching & CCIE Security

Issue Date: Jan 1, 2023

STP Table of Contents
STP Supplement
25 Question Study Quiz

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Layer 2 Switching

For the CCNA candidate, this study guide covers basic Layer 2 bridging and switching technologies; examines Cisco's Catalyst series line of LAN switches; and provides an introduction to installing, configuring, and troubleshooting the Cisco Catalyst 1900 series LAN switch.

STP Supplement (by Mike Sweeney)
The Spanning Tree Protocol (STP) is a layer 2 process that is discussed separately as a special focus. STP prevents bridge loops in the network by calculating optimal pathways to the root bridge and then blocking ports that have redundant paths.

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