Conclusion
The world has a long history with LANs and the resulting desire to interconnect LANs over both local and remote areas. Many a failed technology is strewn along the roadside, but we seem to have arrived at a good place.
IP is the internetworking protocol of choice. Ethernet is the LAN technology of choice. Bridging and routing allow you to interconnect at the Ethernet or IP layers, as your needs dictate.
This section provided a review of Ethernet and IP technology, as well as that of LAN interconnect, with more than a bit of cranky commentary along the way as to how we got there. You should now be well prepared to launch into the remainder of this book, which is focused on the use of Juniper Networks’ EX LAN switches in a Layer 2 environment.
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