Slide 31
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TCP
• Transmission Control Protocol
• (IPΞυϨε/ϙʔτͷ4ͭͰࣝผ͞ΕΔ)2ͭͷ
ΤϯυϙΠϯτ͕ɺॱং੍ޚ͞ΕͨόΠτྻΛ
ૹड৴Ͱ͖ΔػೳΛఏڙ͢Δϓϩτίϧ
• σʔλͷΓͱΓͷ։࢝લͷίωΫγϣϯͷཱ֬
ͷͨΊʹɺ1ԟ෮ͷΓͱΓͱ࣌ؒ(1-RTT; Round
Trip Time)͕ඞཁ
• "3-way handshake" ͷ໊લ༗໊
• ʢը૾WikipediaΑΓҾ༻5ʣ
5 h$ps:/
/commons.wikimedia.org/wiki/File:Tcp_normal.png (Author: Dake,
CC BY-SA 2.5)
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