Internet Infrastructure Review (IIR) Vol.47
June 2020

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• Executive Summary[459KB]
• Periodic Observation Report "Messaging Technology"[1.39MB]

  In this issue, we report on the prevalence of sender authentication technologies (SPF, DKIM, DMARC) that are effective against email spoofing.
  We also discuss how to use the results of sender authentication against the type of phishing emails currently circulating. We also report on the JPAAWG 2nd General Meeting, held last year.

• Focused Research (1) "IIJ's Efforts to Promote LoRaWAN® in Agricultural IoT"[1.64MB]

  With support from the National Agriculture and Food Research Organization's special scheme project on vitalizing management entities of agriculture, forestry and fisheries, IIJ has been developing and testing a low-cost ICT water-management system that facilitates labor saving in the area of paddy field water management. Here, we take a deep dive into the knowhow we have amassed through experience and trial-and-error in the field, which has involved installing base stations, evaluating data link performance, and the like.

• Focused Research (2) "COVID-19's Impact on FLET'S Traffic"[713KB]

  The COVID-19 situation prompted the closure of Japan's schools nationwide from March, resulting in a sharp rise in people working remotely from home. The changes in many people's Internet usage patterns put a strain on individual services and communication links, and social media was filled with people observing this phenomenon and expressing dissatisfaction. Yet there is not much information out there on the macro situation. As such, we report on the impact on traffic on IIJ's FLET'S-based services as a bellwether of broadband services used mainly in the home.