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. Become a ZONE Subscriber and gain access to all Study Guides Author: Leigh Anne Chisholm / Mike Sweeney Technical Level: CCNA™ and CCNP™ and CCIE Security & CSS1™ CCNP-Switching Date of Issue: 01-01-2023 Rating:   3 of 5    Table of Contents  Tutorial  STP Table of Contents  STP Supplement  3 Sample Study Questions  25 Study Questions Return to Study Guides