Join Greg Sowell for an in-depth discussion in this video Spanning-Tree Protocol (STP), part of Foundations of Networking: Network Media (WANs).
- [Voiceover] A switched network's…greatest enemy is a loop.…A switching loop occurs when a cable is connected…from one switch port to another…joining a single layer two network.…This can be on a single switch…or amongst several switches that are trunked together.…The very nature of ethernet is what causes the issue.…Imagine that a switch has a cable looped…to itself from port one to port two.…That switch has a host send a frame…destined for a MAC address that the switch…doesn't have in its MAC address table.…
The switch will then flood that frame.…Flooding is the process by which…a switch sends a frame out all ports,…save for the one that it was sourced on.…This frame will be sent out port one and two simultaneously.…They will then be received by each other,…and since it is destined for an unknown source,…they are then forwarded back out every port,…which repeats the cycle.…Since a switch can forward these frames at sub second rates,…the frames keep multiplying, over and over,…and the switch's CPU will be overwhelmed almost immediately.…
He discusses different WAN technologies and features such as speeds, spans, and price points—including inexpensive options such as VPN. He then covers switches (the devices that connect computers in your building) and routers (devices that control the transmission of network data). Along the way, Greg shows how to build private connections, implement free networking over the Internet, build switch networks, and overlay-routed networks. He'll also introduce different routing protocols, such as OPSF link-state routing and distance-vector routing with RIPv2, EIGRP, and BGP.
Note that this course maps to domains 1 and 2 of the Microsoft Technology Associate (MTA) Networking Fundamentals certification exam (98-366).
- Understanding the technology: from dial-up to VPNs
- Working with hubs, bridges, and switches
- Ensuring hardware redundancy
- Using switching types and MAC tables
- Preventing bridge loops with STP
- Routing with routing tables
- Using NAT
- Securing your switches and routers
- Setting up firewalls
- Working with different routing protocols: RIPv2, OSPF, EIGRP, and more
Skill Level Beginner
Foundations of Networking: Network Media (LANs)with Greg Sowell1h 7m Intermediate
1. WAN Technologies
4. Routing Protocols
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