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対象OSï¼Windows 2000 Professionalï¼Windows XP Home Editionï¼Windows XP Professionalï¼Windows 2000 Serverï¼Windows 2000 Advanced Serverï¼Windows Server 2003 解説 TCP/IPãããã¯ã¼ã¯ãã¤ãªãããªãã¨ãã£ããã©ãã«ãçºçããå ´åãã¾ã確èªããã®ã¯pingã³ãã³ãã«ããå¿çããããã©ããã§ããããããã«ããç¸æã®ãµã¼ããçãã¦ãããã©ãããããã®ãµã¼ãã¾ã§ã®çµè·¯ãæå¹ã§ãããã©ãããªã©ãåããã ããã¦pingãã¹ãããã¹ããã°ã次ã¯ç¹å®ã®TCPãUDPã®ãã¼ãã«å¯¾ããæ¥ç¶ãã¹ããè¡ãããµã¼ãã¨ã¯ã©ã¤ã¢ã³ãéã§éä¿¡ãæ£ããã§ãã¦ãããã©ããã調ã¹ããã¨ããã®ãä¸è¬çãªã¨ããã ãããã ãã®æ¥ç¶æ§ã®ãã¹ãã®ããã«ã¯ããã¤ãã®æ¹æ³ããã¼ã«ãããã®ã§ãããã§
1. ãããåãã㨠TCPã¯ãããã¯ã¼ã¯å¸¯åãä»ã®TCPã»ãã·ã§ã³ã¨è²ãåãã¾ãã TCPã«ã¯ããããã¯ã¼ã¯ãæ··é(輻輳:ãµããã)ãã¦ããã¨ãéä¿¡ããããã±ããéãæ¸ããä»çµã¿ãããã¾ãã ãã®è²ãåãããããããããç¾å¨ã®ã¤ã³ã¿ã¼ãããã¯å¤æ°ã®äººéãåæã«ä½¿ãã¦ãã¾ãã åæ§ã«ãç¾å®ä¸çã«ããã¦ãç¡çãªç«¶ãåããè¡ããããè²ãåããè¡ã£ãæ¹ãã¹ã±ã¼ã©ããªãã£ãä¸æãã¾ãã 2. ä¿¡é ¼ã¯ããç´°ãããªç¢ºèªå¿çã§å®ç¾ãããã㨠TCPã§ã¯ãä¿¡é ¼æ§ã確ä¿ããããã«Ack(Acknowledgementã確èªå¿ç)ãéä¿¡ãã¦ãã¼ã¿ã®å°çãä¼ãã¾ãã TCPã®ã»ãã·ã§ã³ã確ç«ãã¦ããéã¯ãAckãç´°ããéåä¿¡ããç¶ãã¾ãã ãã®ããç´°ããªç¢ºèªå¿çãä¿¡é ¼ã®æ ¹å¹¹ã§ããã¨è¨ã£ã¦ãéè¨ã§ã¯ããã¾ããã ç¾å®ä¸çã«ããã¦ããããç´°ããå¿çãè¡ãäºãéè¦ã§ãã ã¡ã¼ã«ãªã©ãåãåã£ã¦ããå ¨ãè¿äºãããªãç¸æ
ä»åã¯ãIPã¢ãã¬ã¹ã®ç¥èãåããã®ãä¸å¿ã«åºé¡ããããããã¯ã¼ã¯è¨å®ã®åºæ¬ã«ç«ã¡æ»ããèªåã®å¼±ç¹ãè¦æ¥µãã¦ã»ããã IPã¢ãã¬ã¹ãã192.168.1.1ãããµãããããã¹ã¯ã255.255.255.240ãã®ãµã¼ãã¨åããããã¯ã¼ã¯ä¸ã«ã¯ãã¯ã©ã¤ã¢ã³ããã·ã³AãBãCãD ããããããããã®IP ã¢ãã¬ã¹ã¯æ¬¡ã®éãã§ããã Aï¼ IP ã¢ãã¬ã¹ã192.168.1.10 ãµãããããã¹ã¯ã255.255.255.240 Bï¼ IP ã¢ãã¬ã¹ã192.168.1.20 ãµãããããã¹ã¯ã255.255.255.240 Cï¼ IP ã¢ãã¬ã¹ã192.168.1.30 ãµãããããã¹ã¯ã255.255.255.240 Dï¼ IP ã¢ãã¬ã¹ã192.168.1.40 ãµãããããã¹ã¯ã255.255.255.240 ãã®ãã¡ä½å°ãã¯ããµã¼ãã¨éä¿¡ãããã¨ãã§ããªãã£ãããã¦ãä½å°ã®ã¯ã©ã¤ã¢ã³ã
What is "Tcpillust"? Tcpillust is an X11 based graphical analysis tool for tcp connection. It takes tcpdump file(s) specified at the command line and draws pictures like figures in the ``TCP/IP Illustrated'' series. (see sample images below) Tcpdump files fed to by tcpillust should contain only data for a single TCP connection. If other data are contained in the tcpdump files, tcpillust can't
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