Network Architecture 2003 f Network Architecture 2003 f

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回線交換 Network Architecture 2003 f

回線交換 Network Architecture 2003 f

パケット交換 Network Architecture 2003 f

パケット交換 Network Architecture 2003 f

パケット交換 送信先 送信元 Network Architecture 2003 f

パケット交換 送信先 送信元 Network Architecture 2003 f

階層化について 階層化の概念 u. OSI 7層モデル u Network Architecture 2003 f

階層化について 階層化の概念 u. OSI 7層モデル u Network Architecture 2003 f

プロトコルの階層化 ping HTTP, MAIL TCP nfs, Domain UDP IP ICMP ARP application layer transport

プロトコルの階層化 ping HTTP, MAIL TCP nfs, Domain UDP IP ICMP ARP application layer transport layer IGMP network layer RARP hardware interface media Network Architecture 2003 f data link layer

データリンク層 Network Architecture 2003 f

データリンク層 Network Architecture 2003 f

複数人で一斉に喋り出した場合 Network Architecture 2003 f

複数人で一斉に喋り出した場合 Network Architecture 2003 f

CSMA/CD (Carrier Sense Multiple Access/Collision Detection) • 搬送波感知多重アクセス/衝突検出方式 A B Cはケーブルの通信状況を監視し （Carrier Sense） ケーブルが空くと通信を開始する

CSMA/CD (Carrier Sense Multiple Access/Collision Detection) • 搬送波感知多重アクセス/衝突検出方式 A B Cはケーブルの通信状況を監視し （Carrier Sense） ケーブルが空くと通信を開始する C Network Architecture 2003 f パケット

ネットワーク層 Network Architecture 2003 f

ネットワーク層 Network Architecture 2003 f

アドレス付け • ＩＰアドレス – 133. 27. 4. 121 など – 世界中で一意な識別子 – 各コンピュータは一つ以上のIPアドレスを持つ 133.

アドレス付け • ＩＰアドレス – 133. 27. 4. 121 など – 世界中で一意な識別子 – 各コンピュータは一つ以上のIPアドレスを持つ 133. 27. 4. 121 Ns 0. sfc. keio. ac. jp 216. 239. 57. 99 www. google. com 203. 178. 142. 130 133. 27. 10. 11 203. 178. 138. 99 www. soi. wide. ad. jp 133. 27. 100 Network Architecture 2003 f

トランスポート層 Network Architecture 2003 f

トランスポート層 Network Architecture 2003 f

バーチャルサーキット Network Architecture 2003 f

バーチャルサーキット Network Architecture 2003 f

データグラム Network Architecture 2003 f

データグラム Network Architecture 2003 f

UDP Network Architecture 2003 f

UDP Network Architecture 2003 f

TCP Network Architecture 2003 f

TCP Network Architecture 2003 f

TCPの仕組み(状態遷移) CLOSED Passive open Close Active open/SYN LISTEN SYN/SYN+ACK SYN_RCVD ACK Close/FIN ACK/ACK+SYN ESTABLISHED

TCPの仕組み(状態遷移) CLOSED Passive open Close Active open/SYN LISTEN SYN/SYN+ACK SYN_RCVD ACK Close/FIN ACK/ACK+SYN ESTABLISHED FIN/ACK Close/FIN FIN_WAIT_1 ACK FIN_WAIT_2 Close SYN_SENT FIN/ACK Close/FIN CLOSING FIN+ACK/ACK FIN/ACK CLOSE_WAIT ACK TIME_WAIT Active close Network Architecture 2003 f LAST_ACK Passive close ACK

Network Architecture 2003 f Network Architecture 2003 fNetwork Architecture 2003 f Network Architecture 2003 f
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