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What Is Layer-2 and Why Do We Need It?

Ivan Pepelnjak of comments:

I’m constantly ranting against large layer-2 domains; recently going as far as saying “we don’t really need all that stuff.” Unfortunately, the IP+Ethernet mentality is so deeply ingrained in every networking engineer’s mind that we rarely ever stop to question its validity.

Let’s fix that and start with the fundamental question: What is Layer-2?

Ivan takes a hard look at the Data Link layer and wonders why we still need it.

Read more at: What Is Layer-2 and Why Do We Need It?

About the author

Tom Hollingsworth

Tom Hollingsworth is a networking professional, blogger, and speaker on advanced technology topics. He is also an organizer for networking and wireless for Tech Field Day.  His blog can be found at

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