The Internet is expanding at rates unimaginable even 10 years ago, and with new applications and traffic characteristics not envisioned at the start. I will walk through a roadmap to TbE, factoring in traffic drivers and volumes, key issues and tradeoffs, and the relative roles of packet and high-bandwidth optical circuit transport and switching. For example, will TbE simply hasten the routing of today's Internet Protocol (IP) packets, or will some form of lambda switching be needed to carry time-critical volume flows?
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