The Easiest Way to go Faster is to go Faster
Why 400G Ethernet? In one sentence, because the easiest way to go faster is to go faster.
Over time, Ethernet speed transitions have been the primary driver for improving both the throughput and price-performance of datacenter networks. 400G Ethernet is the next major transition on this journey. While 100G Ethernet is still ramping up rapidly this year and next, it is projected that by the end of 2021 400G Ethernet will represent the majority of Ethernet bandwidth shipped.
Arista is predicting that 400G volumes will be relatively low in 2019. But the company cites Dell’Oro research that predicts 400G to grow dramatically beginning in 2020.

The move provides enterprises that are overwhelmed by available options with the choice of tested, open source tools that can be used to construct cloud-native-based applications.
The CableOS software core can be deployed on common-off-the-shelf servers.
Separating the control plane and the user plane in wireless networks will allow network operators more flexibility with different types of traffic.
The firm's SaaS platform acts as a translation layer between the language a developer is using to write code and where that code is being sent.