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DNSの話1 ~ Webアプリエンジニアの一人ネットワーク勉強会

D849a9a1268bf7b840d1eb762873f7ca?s=47 woshidan
September 21, 2016

DNSの話1 ~ Webアプリエンジニアの一人ネットワーク勉強会

・できる業務の範囲を増やしたいWebアプリエンジニアの独学まとめ資料です
・ちゃんとした解説は参考スライドなどをたどってください
・図解にすると分かりやすそうだったけど、ブログに図を貼るのがめんどくさすぎてスライド作ってスライドをブログに貼ることにしたようなそれです

D849a9a1268bf7b840d1eb762873f7ca?s=128

woshidan

September 21, 2016
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  1. 8FCΞϓϦΤϯδχΞͷ ҰਓωοτϫʔΫษڧձ %/4ʹ͍ͭͯ XPTIJEBO

  2. ࠷ॳʹ w Ͱ͖Δۀ຿ͷൣғΛ૿΍͍ͨ͠8FCΞϓϦΤϯδ χΞͷಠֶ·ͱΊࢿྉͰ͢ w ͪΌΜͱͨ͠ղઆ͸ࢀߟεϥΠυͳͲΛͨͲͬͯ͘ ͍ͩ͞ w ਤղʹ͢Δͱ෼͔Γ΍ͦ͢͏͚ͩͬͨͲɺϒϩάʹ ਤΛషΔͷ͕ΊΜͲ͗ͯ͘͢͞εϥΠυ࡞ͬͯεϥ

    ΠυΛϒϩάʹషΔ͜ͱʹͨ͠Α͏ͳͦΕͰ͢
  3. – http://www.infraexpert.com/study/tcpip15.html l%/4 %PNBJO/BNF4ZTUFN ͸ɺυϝΠϯ໊ʢίϯϐϡʔλΛࣝผ͢ Δ໊শʣΛ*1ΞυϨεʹࣗಈతʹม׵ͯ͘͠ΕΔΞϓϦέʔγϣϯ૚ϓϩτ ίϧͰ͢ɻ %/4ͷ࢓૊ΈʹΑΓɺ֮͑ʹ͍͘*1ΞυϨεͰ͸ͳ͘ϩʔϚࣈͰ63-Λೖ ྗ͠8FCΞΫηεͨ͠ΓɺϩʔϚࣈͰϝʔϧΞυϨεΛೖྗͯ͠ϝʔϧૹ৴ ͕Ͱ͖·͢ɻz

  4. ࡢ೔ ɺ%/4ͷ࠶ؼ໰͍߹Θ͕ͤΘ͔ Βͳ͍ͱ͍͏࿩Λͯ͠ऴΘͬͨͷͰɺ ࠓ೔͸%/4ʹ͍ͭͯ

  5. %/4ͱ͸ w υϝΠϯ໊ XXXXPTIJEBOFYBNQMFDPN Λ*1Ξ υϨεʹࣗಈతʹม׵͢ΔΞϓϦέʔγϣϯ૚ϓϩ τίϧ w )551ͱ͔'51ͱ͔ಉ͡૚ͷϨΠϠʔͷϓϩτίϧ w

    #*/%ͱ͔8JOEPXTͷ%/4αʔόͱ͔Ͱߏங w ͔ͩΒ࣍ͷεϥΠυͰ)551ͱ͔'51ͱ͔ͷύέο τͱൺ΂ͯΈΔͱ
  6. )551΍%/4ͷύέοτ *1ϔομ 5$16%1ϔομ ͦͷϓϩτίϧͷσʔλʹ ͳͬͯΔ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM

  7. )551΍%/4ͷύέοτ छྨύέοτͷछྨ͕ ͋Δͷ͸ޙͰ࿩͠·͢

  8. υϝΠϯͷߏ଄ʹ͍ͭͯ w ͦ΋ͦ΋ɺ%/4Ͱ*1ΞυϨεͱରԠௐ΂ͯΔυϝΠ ϯͬͯͲΜͳͷ

  9. υϝΠϯͷߏ଄ʹ͍ͭͯ XXXFYBNQMFDPKQ ੺ઢͰҾ͍ͨͱ͜ΖͦΕͧΕ໊લ͕͋Δ

  10. υϝΠϯͷߏ଄ʹ͍ͭͯ XXXFYBNQMFDPKQ τοϓϨϕϧυϝΠϯ 5-% ࠃผɺ஍Ҭɺ ɹ঎༻ͳͲΛද͢υϝΠϯ

  11. υϝΠϯͷߏ଄ʹ͍ͭͯ XXXFYBNQMFDPKQ ηΧϯυϨϕϧυϝΠϯ 4-% ૊৫ͷछྨΛද͢υϝΠϯ Ұ෦τοϓϨϕϧυϝΠϯ DPNFUD Ͱ͸ͳ͔ͬͨΓ

  12. υϝΠϯͷߏ଄ʹ͍ͭͯ XXXFYBNQMFDPKQ αʔυϨϕϧυϝΠϯ ۩ମతͳاۀ໊΍૊৫ͳͲΛද͢υϝΠϯ τοϓϨϕϧυϝΠϯ DPNFUD ʹ΋ΑΔ

  13. υϝΠϯͷߏ଄ʹ͍ͭͯ XXXFYBNQMFDPKQ ϑΥʔεϨϕϧυϝΠϯ ϗετ໊ʹ͋ͨΔυϝΠϯɻ αʔόͷ໾ׂ΍αʔόͰಈ͍ͯΔΞϓϦέʔγϣ ϯʹΑͬͯʮXXXʯʮGUQʯ ΞϓϦέʔγϣϯͷ ϓϩτίϧ ɺʮBQQʯʮNBOBHFʯ ಉҰυϝΠ

    ϯ಺Ͱͷίϯϐϡʔλͷ໾ׂ ɺʮUFTUʯ ʮJOUFHSBUJPOʯ ಈ࡞؀ڥ ౳ͷ͚ͭํ͋Γ
  14. %/4ͷߏ੒ʹ͍ͭͯ w %/4 %PNBJO/BNF4ZTUFN Λߏ੒͍ͯ͠Δίϯ ϐϡʔλ͸େ͖͘෼͚ͯ%/4αʔόͱϦκϧόʹ Θ͚ΒΕΔ

  15. %/4αʔόʹ͍ͭͯ w %/4αʔό͸υϝΠϯͷ֊૚͝ͱʹଘࡏ͢Δ w ϧʔτ%/4αʔό͸શੈքͰՕॴ͋Δ w ϧʔτ%/4αʔό͸ɺԼҐͷ%/4ʢKQͷ%/4αʔ όɺDPNͷ%/4αʔό ͷ*1ΞυϨεΛ؅ཧ w

    %/4αʔό͸ɺͦͷυϝΠϯͷυϝΠϯ໊ͱ*1Ξ υϨεͷରԠද͚ͩͰͳ͘ԼҐ%/4αʔόͷ*1Ξ υϨε΋؅ཧ
  16. Ϧκϧόʹ͍ͭͯ w 1$ͳͲ͕υϝΠϯ໊Λݩʹ*1ΞυϨεΛਘͶΔɺΫϥΠΞϯτϓϩάϥ Ϝٴͼαʔό w %/4ΫϥΠΞϯτͱ΋͍͏ w ͍ΘΏΔ%/4༻ͷίϯϐϡʔλͰ΋Ϧκϧόͷ໾໨͚͍ͩͯ͠Δ΋ͷ΋ w ͦͷ͏ͪɺ໰͍߹Θ͚ͤͩ͢Δ΋ͷ͸ελϒϦκϧόɻΩϟογϡ͸

    อଘͰ͖ΔͷͰࣾ಺%/4Λ֊૚తʹߏங͢Δͱ͖ؒʹڬΉ͜ͱ΋ w ࠶ؼ໰͍߹ΘͤΛड͚ͨΒ൓෮໰͍߹Θͤ ࣍ճ Λ܁Γฦͯ͠ඞͣ*1 ΞυϨεΛҾͬுͬͯ͘Δ·Ͱಇ͍ͯ͘ΕΔϦκϧό͸ϑϧαʔϏε Ϧκϧόͱ͍͏
  17. Ϧκϧόʹ͍ͭͯ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM

  18. %/4αʔόͷ৑௕ੑʹ͍ͭͯ w %/4αʔόʹ΋଱ো֐ੑΛ͋͛ΔͨΊͷ࢓૊Έ͕ ͋Δ

  19. %/4αʔόͷ৑௕ੑʹ͍ͭͯ w %/4αʔόʹ͸ϓϥΠϚϦ%/4αʔόͱɺϓϥΠϚϦ αʔόʹର͠ηΧϯμϦ%/4αʔό ෳ਺͋Δ͜ͱ΋ ͕͋ Δ w ϓϥΠϚϦ%/4αʔό͸ఆظతʹηΧϯμϦ%/4αʔόʹ σʔλΛಉظͤ͞Δ

    ͜ͷͱ͖ͷ௨৴Λκʔϯసૹͱ͍͏  w Կ͔͋ͬͨͱ͖͸ηΧϯμϦ%/4αʔό͔ΒσʔλΛऔಘ ͯ͠෮׆ͤͨ͞ΓɺηΧϯμϦ%/4αʔόΛҰ࣌తʹར༻ ͨ͠Γ͢Δ
  20. %/4ͷύέοτ w κʔϯసૹͷ࿩͕ग़͖ͯͨͷͰઌ΄Ͳͷ%/4αʔό ͷύέοτ͕छྨ͋Δ݅ʹ͍ͭͯݟͯΈΔ

  21. %/4ͷύέοτ

  22. %/4ͷύέοτ Ϧκϧό͕%/4αʔόʹߦ͏υϝΠϯ໊͔Βͷ*1ΞυϨεͷ໊લղ ܾʹ͸6%1ʢϙʔτ൪߸ʣΛ࢖༻ %/4αʔόͱ%/4αʔόͱ͕κʔϯ৘ใͷϑΝΠϧసૹΛߦ͏৔߹ 5$1 ϙʔτ൪߸ʣΛ࢖༻

  23. %/4ͷύέοτ Ϧκϧό͕%/4αʔόʹߦ͏υϝΠϯ໊͔Βͷ*1ΞυϨεͷ໊લղ ܾʹ͸6%1ʢϙʔτ൪߸ʣΛ࢖༻ %/4αʔόͱ%/4αʔόͱ͕κʔϯ৘ใͷϑΝΠϧసૹΛߦ͏৔߹ 5$1 ϙʔτ൪߸ʣΛ࢖༻ ͍͟ͱ͍͏ͱ͖ͷόοΫΞοϓͷͨΊͷσʔ λ͸ਖ਼͘͠ૹΕͳ͍ͱࠔΔͷͰ5$1 සൟʹߦΘΕΔ໊લղܾͷϦΫΤετ༻ͷ௨৴ ͸ؒҧͬͯ΋ฉ͖௚ͤ͹͍͍͠଎౓༏ઌͰ6%1

  24. %/4αʔόʹ͍ͭͯ w ͯ͞

  25. %/4αʔόʹ͍ͭͯ w %/4αʔό͸ͦͷυϝΠϯͷυϝΠϯ໊ͱ*1Ξυ ϨεͷରԠද͚ͩͰͳ͘ԼҐ%/4αʔόͷ*1Ξυ Ϩε΋؅ཧ

  26. %/4αʔόʹ͍ͭͯ w ؅ཧͬͯαʔόʹอଘͱ͔ͯ͠ΔΜͩͱࢥ͏Μ͚ͩ ͲɺͲ͏΍ͬͯΔͷ

  27. %/4αʔό಺ͷσʔλͷ࿩ w %/4αʔό͸υϝΠϯ໊ͱ*1ΞυϨεͷରԠͤ͞Δ σʔλΛͨ͘͞Μ͍࣋ͬͯ·͕͢ɺͦΕΛϦιʔε Ϩίʔυͱ͍͏ w ϦιʔεϨίʔυͷू߹ମͰ͋Δσʔλϕʔε͸ κʔϯϑΝΠϧͱݺ͹Ε͍ͯΔ w ໊લղܾͷͱ͖͸κʔϯϑΝΠϧதͷϦιʔεϨίʔ

    υΛҾ͍ͯΔ ͨͿΜ
  28. κʔϯϑΝΠϧͷྫ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM

  29. κʔϯϑΝΠϧͷྫ ʜಡΊͳ͔ͬͨͷͰҰͭͣͭ֬ೝ

  30. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 55-%/4αʔό͕κʔϯϑΝΠϧͷσʔλΛΩϟογϡ ͢Δ࣌ؒ σϑΥϧτ

  31. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 03*(*/͜ͷ%/4αʔόͰѻ͏υϝΠϯ໊ϦιʔεϨίʔ υͷهड़Λ͍ͯ͘͠ͱ͖ɺ03*(*/ͷ෦෼ΛলུͰ͖Δ

  32. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 03*(*/͜ͷ%/4αʔόͰѻ͏υϝΠϯ໊ϦιʔεϨίʔ υͷهड़Λ͍ͯ͘͠ͱ͖ɺ03*(*/ͷ෦෼ΛলུͰ͖Δ ͨͱ͑͹੺࿮ͷ෦෼͸*//4OTͱॻ͍ͯ΋ྑ͍

  33. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM !͕͋ΔҰ൪ࠨଆͷ෦෼͸ϥϕϧͱ͍ͬͯɺυϝΠϯΛॻ ͘ɻϗετͷޙͷ෦෼͕ΦϦδϯͱಉ͡৔߹͸লུ͞Εͯ ͍Δɻ

  34. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM ·ͨɺલͷߦͱѻ͏ϥϕϧ͕ಉ͡৔ ߹͸ϥϕϧΛলུͰ͖Δ

  35. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM !͸ϥϕϧ͕ΦϦδϯͱશ͘ಉ͡υϝΠϯΛ͢͞ͱ͖ͷল ུه߸

  36. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM Ϋϥεࢦఆɻ*/͸Πϯλʔωοτ༻ͷࢦఆͱ͍ ͏ҙຯͰجຊతʹ͜Ε͔͠ग़ͯ͜ͳ͍

  37. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM λΠϓࢦఆɻϦιʔεϨίʔυͷछྨ

  38. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM ϦιʔεσʔλɻλΠϓʹରԠͨ͠ σʔλ͕ฒΜͰΔ

  39. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ

  40. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ OTJOGSBFZFDPN υϝΠϯΛϑϧʹॻ͘ͱ͖͸࠷ޙʹΛ͚ͭ Δ ͜ͷκʔϯϑΝΠϧͷσʔλΛ࣋ͭϓϥΠϚϦʔ%/4αʔό

  41. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ QPTUNBTUFSJOGSBFZFDPN ͜ͷυϝΠϯͷ؅ཧऀͷϝʔϧΞυϨεɻ؅ཧऀͱͷ࿈བྷ༻ʹ࢖ ༻͢Δɻͳ͓ɺϝʔϧιϑτʹೖྗ͢Δͱ͖͸ɺϗετͷޙͷ͸ !ʹม׵͢Δ͜ͱɻ QPTUNBTUFSJOGSBFZFDPN

    QPTUNBTUFS!JOGSBFZFDPN
  42. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ 4FSJBM  κʔϯϑΝΠϧͷόʔδϣϯΛද͢਺ࣈɻ
 ؅ཧऀ͕ࣗ༝ʹઃఆͰ͖ɺߋ৽͢Δͱ͖͸ৗʹݱࡏΑΓେ͖͍஋Λ ೖΕΔඞཁ͕͋Δ

    ߋ৽࣌ʹࣗಈతʹೖΔ৔߹΋
  43. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ 3FGSFTI ඵ ηΧϯμϦ%/4αʔό͕ɺϓϥΠϚϦ %/4αʔόͷσʔλߋ৽Λ֬ೝ͠ʹߦ࣌ؒ͘ͷִؒɻ

  44. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ 3FUSZ ඵ ηΧϯμϦ%/4αʔό͕ɺ3FGSFTIͰκʔϯ৘ ใͷߋ৽ʹࣦഊͨ͠৔߹ʹ࠶౓3FGSFTIΛࢼΈΔ·Ͱͷ࣌ؒɻ

  45. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ &91*3& ඵ ηΧϯμϦ%/4αʔό͕ɺκʔϯ৘ใͷϦ ϑϨογϡ͕Ͱ͖ͳ͍ঢ়ଶ͕ଓ͍ͨ৔߹ɺηΧϯμϦ%/4αʔό ͕͍࣋ͬͯΔκʔϯ৘ใΛͲΕ͚ͩͷ࣌ؒར༻͢Δ͔ͷ࣌ؒɻ

  46. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM 40"4UBSUPG"VUIPSJUZͷུɻκʔϯϑΝΠϧͷ࠷ॳͷϦιʔ εϨίʔυͰɺҎԼͷ%/4αʔόͷ֤छ؅ཧ৘ใͷࢦఆ͢Δ .JOVNVN55- ඵ κʔϯϑΝΠϧதͷϦιʔεϨίʔυ ʹଘࡏ͠ͳ͍υϝΠϯͷ໰͍߹Θ͕ͤདྷͯɺͦͷυϝΠϯʹ͍ͭͯ Αͦͷ%/4αʔόΛ໰͍߹Θͤͨͱ͖ɺ໰͍߹Θͤ݁ՌΛอ࣋͠

    ͓ͯ࣌ؒ͘
  47. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM /4/BNF4FSWFSͷུɻυϝΠϯ໊ͱɺͦͷυϝΠϯ໊Λ؅ཧ ͢Δ%/4αʔόΛରԠ෇͚ͨϨίʔυ

  48. κʔϯϑΝΠϧৄࡉ ը૾Ҿ༻ݩ IUUQXXXJOGSBFYQFSUDPNTUVEZUDQJQIUNM .9.BJMFYDIBOHFͷུɻυϝΠϯͷϝʔϧαʔόΛࢦఆ

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