LAN protection is essential in modern networks. Spanning tree's application and tuning should be used on all L2 networks.
- In a layer two network, … one of the major dangers for any administrator … is a switching loop. … This occurs when any frame is flooded into a switch network … that contains redundant links with no protection. … These packets will loop infinitely, … and as they do so, … will consume more and more resources on the switch, … until they are completely exhausted. … Just one frame can crash a modern switch network … in a matter of seconds. … A technology known as Spanning Tree Protocol … was developed to prevent this exact behavior. … There are several flavors of STP, … but at their core, … most seek to find redundant links, … and stop forwarding of frames over them, … thus preventing loops. … STP starts by electing a route bridge. … Imagine the structure of an STP instance as a tree, … hence the name Spanning Tree. … The root bridge is the very base of the tree, … from which everything else grows. … The root bridge, … has all of its up interfaces forwarding traffic. … Every subsequent switch connected at the tree from the root, …
Note: A complete overview of the exam and registration instructions can be found at https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/ccna-200-301.html.
- Network models
- Network components
- Troubleshooting the interface and cable issues
- Configuring IPv4 and IPv6 addressing
- Switching concepts
- Switching configuration
- Wireless architectures
- Wireless security
Skill Level Intermediate
Networking Foundations: IP Addressingwith Timothy Pintello2h 35m Intermediate
1. Network Fundamentals
2. Network Access
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