is clear that this growth needs to be continually monitored. However, if the criteria applied above are adhered to, then there is no immediate danger of AS space exhaustion. [RFC1930 より引用] 足りなくなり 32-bit (4byte) まで拡張 [RFC4893, 2007] • 大本としては IANA (Internet Assigned Numbers Authority) が管理 非営利法人 ICANN の1機能 実務はRIR (Regional Internet Registery) に委譲 (2021年現在5組織) • 日本では JPNIC (Japan Network Information Center) が担当 RIR APNIC (Asia Pacific) が上位組織 https://www.nic.ad.jp/ja/basics/terms/iana.html https://www.iana.org/numbers https://www.janog.gr.jp/meeting/janog20/pdf/4byte_toyama.pdf