1. 1) Cisco Global Cloud Index: Forecast and Methodology, 2016-2021, White Paper, Jan. 2018. https://www.cisco.com/c/en/us/solutions/collateral/service-provider/global-cloud-index-gci/white-paper-c11-738085.html
2. 2) Cisco Data Center Spine-and-Leaf Architecture: Design Overview, White Paper, Mar. 2017. https://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white-paper-c11-737022.pdf
3. 4) SFF Committee: "SFF-8665, QSFP+ 28 Gb/s 4x pluggable transceiver solution (QSFP28)," Revision 1.9, Jun. 2015
4. 6) QSFP-DD MSA Group: "QSFP-DD specification for QSFP double density 8x pluggable transceiver," Revision 1.0, Sept. 2016
5. 7) OSFP MSA: "Specification for OSFP Octal Small Form Factor Pluggable Module," Revision 1.0, Mar. 2017