Markov chains post?
This post is so incoherent it might be generated by Markov chains.
It's like author has some information from 80s and then picked some recent technology buzzwords then creatively combined them to post generating information which seemed to fit the context. Atrociously bad article.
Ethernet almost invariably is 97.5% efficient, no modern network experiences collisions as all links are full-duplex, point-to-point links to a switch interface.
Efficiency problems are from 80s and 90s using hubs.
Author tries to talk about 'microbursts' in 'converged' ethernet, but does not understand the issue. This is fundamental problem with any technology if offered ingress capacity exceeds egress capacity, someone has to buffer, and if issue persits, buffers run out.
RDMA isn't a thing, this is normal DMA when data is written directly to NIC memory instead of system memory. It is internal ain computer, nothing to do with network.
Blade systems solve nothing, blades are interconnected by ethrenet switches, like everything else.
There is no 56G Ethernet, 100GE has been shipping for year and is in production in most large networks and it has become cheaper than 10x10GE. 400GE is next-up standard actively being worked on.
QUIC has nothing to do with this, QUIC is L4 protocol whose main benefits are when compared to TCP ability to multiplex many stream insde single QUIC session without internal sessions creating HOLB to each other when one stream blocks (i.e. problem google has when SPDY multiplex many sessions in single TCP).
Other benefits QUIC delivers is ability to roam between IP addresses, as session is not bound to particular IP as it's cryptogrpahically authenticated we can receive next packet from any IP
It offers FEC by having ability to send redundant parity packets, so if packet loss is 1% it can send 101 packets for every 100 packet and receiver can reconstruct any dropped packet, no resending needed, offering much better potential capacity than TCP in lossy conditions.
It has 0 RTT penalty for estabilshing session (First packet is payload packet), apart from first session ever where crypto keys need to be exchanged.
It has no packet amplification potential.
It's great protocol and we need to have in our toolbox new L4 protocl taking lessions from QUIC and MinimaLT, but nothing to do with SDN or Ethernet performance or anything in the article.