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ωοτϫʔΫೖ໳ษڧձ OSIࢀরϞσϧ ୈ 1 ૚: ෺ཧ૚ Takashi Funato 2020.04.19 1

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Agenda •෺ཧ૚ͱ͸ •༷ʑͳ෺ཧ૚ •·ͱΊ 2

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෺ཧ૚ 3

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෺ཧ૚ • ෺ཧ૚ͱ͸OSIࢀরϞσϧͷୈҰ૚ʢϨΠϠ̍ʣͰɺిؾ৴߸΍ޫ΍ ి೾ͳͲͰɺసૹΛߦ͏ͨΊͷ෺ཧతͳίωΫγϣϯΛ୲͏෦෼Λఆ ٛͨ͠΋ͷ • ෺ཧతͳ૷ஔͰɺ෺ཧݱ৅ʢిؾతͳ৴߸ͷतडͳͲʣΛѻ͏ • ௨৴ഔମΛྲྀΕΔ৴߸ͷܗࣜ΍ɺ෺ཧతͳ࢓༷ΛఆΊΔ • ωοτϫʔΫߏ੒͢ΔͨΊͷ࠷Լ૚ϨΠϠ 4

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༷ʑͳ෺ཧ૚ 5

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༷ʑͳ෺ཧ૚ 1 ਎ۙͳ΋ͷ • Wi-Fiϧʔλ • Wi-Fi ػث΍ن֨ʢIEEE 802.11ʣ • LANέʔϒϧʢCAT5eͱ͔ʣ • RJ-45ϓϥά • LANέʔϒϧ಺ΛྲྀΕΔిؾ৴߸ͷن֨΋౰વܾΊΒΕ͍ͯΔʢΠʔαωοτ: 10Base-Tͱ͔ʣ • Hub • ࠓͰ͸εΠονϯάϋϒ͕ओྲྀʢL3εΠονͳͲߴػೳͳ෺͕ग़͍ͯΔʣ • ੲ͋ͬͨϦϐʔλʔͱݺ͹ΕΔHub͸ίϦδϣϯى͜Γ͕ͪ 6

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༷ʑͳ෺ཧ૚ 2ʢੲ࿩ʣ • 56kbpsϞσϜ • μΠΞϧΞοϓ઀ଓʹΑΔΠϯλʔωοτ઀ଓʢςϨϗʔμΠʣ • σεΫτοϓPCͷPCIόε΍ISAόεʹɺࠩͯ͠ి࿩ઢΛͭͳ͙ • ISDNϞσϜ • ެऺަ׵ి࿩໢Λར༻ͨ͠σδλϧ௨৴ʢ64kbpsʣ • ADSLϞσϜ • ެऺަ׵ి࿩໢Λར༻ͨ͠Πϯλʔωοτ઀ଓ 7

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༷ʑͳ෺ཧ૚ 3ʢੲ࿩ʣ • RS232 • ίϯϐϡʔλಉ࢜Λͭͳ͙ͨΊͷݹͷن֨ʢϓϦϯλͳΜ͔΋ʣ • γϦΞϧϙʔτ΍COMϙʔτͱݺ͹Εͨ • ʢࠓͰ΋ݹ͍ωοτϫʔΫػث͸͜ΕͰͭͳ͙͔΋͠Εͳ͍ʣ 8

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༷ʑͳ෺ཧ૚ 4 ޫ௨৴ͷ࣌୅΁ • FTTH • ޫϑΝΠόΛ఻ૹ࿏ͱͨ͠ޫ௨৴ • ऴ୺૷ஔͱͯ͠ONUΛ࢖͏ • ޫέʔϒϧ • ೔ຊதʹுΓ८Β͞Εͭͭ͋Δ • ւఈޫέʔϒϧ • ւఈΛ௨ͬͯੈքதʹுΓ८Β͞Ε͍ͯΔ 9

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༷ʑͳ෺ཧ૚ 5 ੈքن໛ͷޫ௨৴ͷ࣌୅΁ https://www.submarinecablemap.com/ • μΠΞϧΞοϓ 56kbps • ADSL 50Mbps ͘Β͍ • VDSL 100Mbps ͘Β͍ • FTTH 1Gbps~ 10Gbps ͷੈքʹ 10

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༷ʑͳ෺ཧ૚ 4 ޫ௨৴ͷ࣌୅΁ 11

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͜͜Ͱ໰୊Ͱ͢ 12

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RFC1149ʹ͓͚Δ ෺ཧ૚͸ͳʹ͔ʁ 13 13

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RFC1149ͱ෺ཧ૚ • ෺ཧ૚ • ఻ॻോʢ໌֬ʹോͱࣔ͞Ε͍ͯͳ͍͕ʣ • ר͖෺Ͱͷ΍ΓऔΓ • ෺ཧ૚͸෺ཧతͳػثٴͼɺػثͲ͓͠ͷ΍ΓऔΓΛఆٛ͢Δ 14 https://qiita.com/yoshi389111/items/a7ba3d66bb775bafeb6e

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·ͱΊ 15

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·ͱΊ • ෺ཧ૚΋௨৴଎౓ͷߴ଎Խʹ൐͍ɺ༷ʑʹਐԽ͍ͯ͠Δ • ͜Ε͔Β΋ਐԽ͍ͯͩ͘͠Ζ͏ • AWSͳͲͷΫϥ΢υαʔϏε͸෺ཧ૚ΛӅṭɺ؆ུԽ͍ͯ͠Δ • ෺ཧ૚ͷߏஙίετ͕ͳ͍Ըܙ͸ఈ஌Εͳ͍ • Ϋϥ΢υΛ࢖Θͳ͍৔߹ɺαʔόɺωοτϫʔΫػثͳͲΛσʔλ ηϯλʹӡΜͰLANέʔϒϧͰ݁͹ͳͯ͘͸ͳΒͳ͍ 16