Bridging the Ether: The Evolution of the Ethernet Link Layer, VLANs, and More
Today I'm diving DEEP into the world of the Ethernet link layer (layer 2). It's a very misunderstood part of network engineering, and confusion around the relationships between layers 2 and 3, VLANs, and why layer 2 and 3 are how they are, can easily trip up newcomers. But I'm going much further than that, from the basics of Ethernet framing, to bridged forwarding, spanning trees, and more!
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Timestamps:
0:00:00 - Introduction
0:00:34 - OSI Model
0:02:01 - History of Networking
0:07:44 - Ethernet Framing
0:12:23 - Unicast and Multicast
0:17:15 - Neighbor Discovery
0:24:23 - Bridging the Ether (802.1D)
0:30:08 - Spanning Trees (802.1W)
0:41:36 - Link Aggregation (802.3AD)
0:48:18 - Virtual LANs (802.1Q)
1:01:21 - Access Control Lists
1:07:40 - Wire/Port Security (802.1X/802.1AE)
1:15:09 - Scaling Up (TRILL, 802.1AQ, EVPN)
1:31:00 - Conclusion
#networking #ethernet #networkengineer
