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ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 04, 2005, 08:47:05 PM


»Ñ­ËҢͧà¤Ã×Í¢èÒÂã¹ÃдѺªÑé¹ Network à»ç¹»Ñ­ËÒ¡Ò÷ӧҹ¢Í§â»ÃⵤÍÅã¹ÃдѺÃкº»¯ÔºÑµÔ¡Òà ·Õèãªéâ»ÃⵤÍÅ ÍÂèÒ§ àªè¹ IP ËÃ×Í IPX à»ç¹µé¹
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StepOne
ÅѡɳТͧ»Ñ­ËÒã¹ÃдѺªÑé¹à¤Ã×Í¢èÒ (Network)  :D

      »Ñ­ËҢͧà¤Ã×Í¢èÒÂã¹ÃдѺªÑé¹ Network à»ç¹»Ñ­ËÒ¡Ò÷ӧҹ¢Í§â»ÃⵤÍÅã¹ÃдѺÃкº»¯ÔºÑµÔ¡Òà ·Õèãªéâ»ÃⵤÍÅ ÍÂèÒ§ àªè¹ IP ËÃ×Í IPX à»ç¹µé¹ áµè㹩ºÑº¹Õé ¨Ð¢Íà¹é¹áµè »Ñ­ËҢͧ IP

   *»Ñ­ËÒµèÒ§æ·Õèà¡Õ觢éͧ¡ÑºÃдѺªÑé¹à¤Ã×Í¢èÒ Áմѧ¹Õé

 -äÁèÊÒÁÒö ãªé¤ÓÊÑè§ Ping áµèÁÕ¢éͤÇÒÁáÊ´§¤ÇÒÁ¼Ô´¾ÅÒ´¾ÃéÍÁ Error Code

 -äÁèÊÒÁÒö Ping à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì ·ÕèÍÂÙèã¹à¤Ã×Í¢èÒÂà´ÕÂǡѹä´é

 -äÁèÊÒÁÒö Ping à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì·ÕèÍÂÙèµèÒ§à¤Ã×Í¢èÒ ËÃ×Í Subnet ä´é

 -äÁèÊÒÁÒö Ping ª×èÍà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì·ÕèÍÂÙèã¹à¤Ã×Í¢èÒÂà´ÕÂǡѹä´é

 -äÁèÊÒÁÒö Ping ª×èÍà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì·ÕèÍÂÙèµèÒ§à¤Ã×Í¢èÒ¡ѹä´é

 -à¡Ô´»Ñ­ËÒ ¤ÇÒÁ¼Ô´¾ÅÒ´ ·ÕèáÊ´§ÇèÒ à¡Ô´¡ÒâѴáÂ駢Ö鹺¹à¤Ã×Í¢èÒÂ

 -à¡Ô´ ¢èÒÇÊÒÃà¡ÕèÂǡѺ¤ÇÒÁ¼Ô´¾ÅÒ´¢³Ð¨Ð Logon à¢éÒä»·Õè Server

 -ÊÒÁÒö Ping àËç¹à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ áµèä´éÃѺ¤ÓµÍºÇèÒ Destination Unreachable

 -µÃǨ¾ºÇèÒ ÁÕ Retransmission à¡Ô´¢Öé¹ÁÒ¡ÁÒº¹à¤Ã×Í¢èÒ (ÃÙ»·Õè 1)



ÃÙ»·Õè 1 áÊ´§¡ÒÃà¡Ô´ Retransmission º¹ TCP/IP

 -¼Ùéãªé§Ò¹ÊÒÁÒö Access à¢éÒä»·Õè Host ËÃ×Í Server ºÒ§µÑÇà·èÒ¹Ñé¹ Êèǹ Host ËÃ×Í Server Í×è¹ äÁèÊÒÁÒö Access à¢éÒä»ä´é ËÃ×Í¿éͧ Error ÍÍ¡ÁÒ

 -ÁÕà¾Õ§ â»ÃⵤÍźҧµÑÇà·èÒ¹Ñé¹·ÕèÊÒÁÒöÇÔè§ÍÍ¡¼èÒ¹ Router ä´é

 -à¤Ã×èͧäÁèÊÒÁÒö Access Host Í×è¹æ ·ÕèÍÂÙ褹ÅÐà¤Ã×Í¢èÒ ¼èÒ¹·Ò§ Router

 -ÊÒÁÒö Access ä»·Õè Host ËÃ×Í Server ੾Òкҧ Services à·èÒ¹Ñé¹

 -äÁèÊÒÁÒö Ping Loop back Address (127.0.0.1) º¹à¤Ã×èͧ·ÕèÁջѭËÒ

 -äÁèÊÒÁÒö Ping ËÃ×͵Դµè͡Ѻ Default Router

 -¡ÒÃàª×èÍÁµèÍà¡Ô´ËÅØ´à»ç¹¤ÃÑ駤ÃÒÇàÍÒá¹èäÁèä´é

 -¤ÍÁ¾ÔÇàµÍÃìÅÙ¡¢èÒ·ÕèäÁèÁÕ Disk äÁèÊÒÁÒö·Ó§Ò¹ä´é

 -»ÃÐÊÔ·¸ÔÀÒ¾¡Ò÷ӧҹ¢Í§ TCP/IP µèÓÁÒ¡

 -TCP Windows Size àÅç¡à¡Ô¹ä»

 -TCP Windows Size ¶Ù¡ Drop ã¹»ÃÔÁÒ³·Õè¹éÍ¡ÇèÒ¤èÒÊÙ§ÊØ´

 -¤èÒ Windows Size ¤§·Õè áµè Packet »ÃÐàÀ· Acknowledge ÁÕ¡ÒõͺÃѺªéÒÁÒ¡

 -¢¹Ò´¢Í§ TCP Windows âµà¡Ô¹ä»

 -ÁջѭËÒ¢³Ð¡ÒÃãªé RIP



ÃÙ»·Õè 2 áÊ´§¡ÒèѴµÑ駤èÒ IP áÅÐ Subnet mask äÁè¶Ù¡µéͧ ÊÒà˵Øâ´Â·ÑèÇä»·Õèà¡Ô´¢Ö鹺¹ÃдѺªÑé¹ Network

 -Application äÁèä´éà»Ô´ãªé ËÃ×ÍäÁèÊÒÁÒöãªé§Ò¹ä´é

 -à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ äÁèÍÂÙèã¹Ê¶Ò¹Ð¾ÃéÍÁ·Õè¨Ð·Ó§Ò¹

 -DNS Server äÁèÊÒÁÒö·Ó Reverse Lookup áÅÐËÃ×ÍäÁèÊÒÁÒöµÍºÃѺ¡ÒÃÃéͧ¢Í¡ÒÃ·Ó Reverse Lookup ¢Í§à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃìÍ×è¹æ

 -µÒÃÒ§ DNS äÁèÊÁºÙóì ËÃ×ÍäÁèÁÕ¤èÒàºÍÃì IP ËÃ×Í¢éÍÁÙÅà¡ÕèÂǡѺ¡Òà Mapping ª×èÍ Domain ãËé¡Ñº Host

 -IP Address ª¹¡Ñ¹ : ÁÕà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃìÍ×è¹·Õèãªé IP «éӡѹ

 -ª×èͧ͢ Host áÅÐ IP Address à¡Ô´ÁջѭËÒ

 -Port ¢Í§ Router äÁèÊÒÁÒö·Ó§Ò¹ä´éµÒÁ»¡µÔ



ÃÙ»·Õè 3 áÊ´§¡Ò÷ӧҹ»¡µÔ Serial Port º¹ Router

 -àºÍÃì IP ·Õè Ping ä»·Õè à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ äÁè¶Ù¡µéͧ

 -à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ¶Ù¡¨Ñ´ Configure à¡ÕèÂǡѺ àºÍÃì IP ËÃ×Í Subnet Mask äÁèàÃÕºÃéÍÂ

 -ÁÕ¡ÒèѴ Filter º¹ Router ´éÇ Access List äÁè¶Ù¡µéͧ

 -Routing Table äÁè¶Ù¡µéͧ à¹×èͧ¨Ò¡ ¢èÒÇÊÒÃà¡ÕèÂǡѺ Routing Table ä´éÃѺÁÒ¨Ò¡ Interface ËÃ×Í â»ÃⵤÍŹÑé¹äÁè¶Ù¡µéͧ

 -¡ÒèѴµÑ駤èÒ Configure ¢Í§ Terminal äÁè¶Ù¡µéͧ

 -User ID ËÃ×Í Password äÁè¶Ù¡µéͧ

 -à¡Ô´¡ÒèѴ Configure ¤èÒ Default Gateway ¢Í§ Host ËÃ×Í Router äÁè¶Ù¡µéͧ

 -¡ÒèѴ Configure ¢Í§ LAN Card ËÃ×Í Interface äÁè¶Ù¡µéͧ

 -¡ÒèѴ Configure Router ãËé Block BOOTP Frame

 -¡ÒèѴ Configure Virtual Link äÁè¶Ù¡µéͧ

 -IP Address ¢Í§ Default Route ã¹ Table ¢Í§ Router à¡Ô´¤ÇÒÁ¼Ô´¾ÅÒ´

 -IP Address ¢Í§ DNS Server äÁè¶Ù¡µéͧ ËÃ×Í¡ÒûѭËÒ¨Ò¡¡Òà Configure ·ÕèÁÕµèÍà¤Ã×èͧ·ÕèÁջѭËÒ

 -IP Address ËÃ×Í Subnet mask ¢Í§à¤Ã×èͧ·ÕèÁջѭËÒ äÁèä´éÃѺ¡ÒèѴ Configure ÍÂèÒ§¶Ù¡µéͧ

 -äÁèÁÕ¡ÒáÓ˹´¤èÒ Default Gateway ÍÂèÒ§¶Ù¡µéͧº¹ Router

 -·Õè Port ¢Í§ Router äÁèä´é¡Ó˹´ IP Address ÍÂèÒ§¶Ù¡µéͧ

 -Host »ÅÒ·ҧ ËÃ×Íà¤Ã×Í¢èÒ·ӧҹ˹ѡ¨¹à¡Ô¹ä»

 -¡ÒèѴ Configure DNS á¡è Client äÁè¶Ù¡µéͧ ·ÓãËé Client ¨ÐµéͧÃÍãËé ¡ÒÃÃéͧ¢ÍãªéºÃÔ¡Òâͧ DNS Server Timeout àÊÕ¡è͹·Õè¨Ð¾ÂÒÂÒÁµÔ´µè͡Ѻ DNS Server µÑÇ·ÕèÊͧ

 -à¤Ã×èͧ·ÕèÁջѭËÒ äÁèä´éàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒÂ

 -Route Distribution ¢Í§ IGRP ËÃ×Í RIP äÁèä´éÃѺ¡ÒèѴ Configure ÍÂèÒ§¶Ù¡µéͧ

 -Router ä´é·Ó¡Òà Block UDP Broadcast Forwarding ·ÓãËé äÁèÊÒÁÒöÊè§ BOOTP Broadcast ÍÍ¡ÁÒä´é µÒÁ»¡µÔ

 -Port ¢Í§ Router ·Õèàª×èÍÁµèÍä»Âѧ»ÅÒ·ҧäÁèÊÒÁÒö·Ó§Ò¹ä´éµÒÁ»¡µÔ

 -¤èÒ Sub Netmask ¢Í§ Host áÅÐ Router äÁèà¢éҡѹ

 -¡ÒÃàª×èÍÁµèÍ TCP ÃÐËÇèÒ§ Host à¡Ô´ Time out

 -TCP/IP Software ËÃ×Í Driver ¢Í§ LAN Card äÁèä´éÃѺ¡ÒèѴ Configure ÍÂèÒ§¶Ù¡µéͧ

 -Hello áÅÐ Dead Timer ¢Í§ Router µèÒ§æ ·Ó§Ò¹äÁè»ÃÐÊÒ¹§Ò¹¡Ñ¹

 -Router Access List äÁè¶Ù¡µéͧËÃ×Í ¡ÒèѴ Configure äÁèÊÍ´¤ÅéͧµèÍ¡ÒÃãªé§Ò¹

 -Router Access List ¶Ù¡¡Ó˹´ãËé Block ºÒ§ Application ËÃ×Í Port
Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 04, 2005, 11:16:09 PM
StepTwo
à¤Ã×èͧÁ×Í·ÕèãªéµÃǨÊͺ»Ñ­ËÒã¹ÃдѺªÑé¹à¤Ã×Í¢èÒÂáÅÐ Transport

      à¤Ã×èͧÁ×Í·ÕèãªéµÃǨÊͺ»Ñ­ËҢͧÃдѺªÑé¹à¤Ã×Í¢èÒ áÅÐ Transport ÁÕÁÒ¡ÁÒÂËÅÒ»ÃСÒà ·Ñ駷Õèà»ç¹áºº Software Utility ·ÕèÁҡѺ Ãкº»¯ÔºÑµÔ¡Òà áÅÐ Software µèÒ§æ  Tongue

Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 05, 2005, 10:55:57 AM
StepThree
¡ÒÃãªé¤ÓÊÑè§ Ping

   *Ping à»ç¹à¤Ã×èͧÁ×Í·Õè¶Ù¡ãªéà¾×èÍ¡ÒõÃǨÊͺ ¡ÒÃàª×èÍÁµèÍÃÐËÇèÒ§  :-\

 -¤ÍÁ¾ÔÇàµÍÃì¡Ñº¤ÍÁ¾ÔÇàµÍÃì´éÇ¡ѹ

 -¤ÍÁ¾ÔÇàµÍÃì¡Ñº LAN Card

 -¤ÍÁ¾ÔÇàµÍÃ캹à¤Ã×Í¢èÒ ¡Ñºâ»ÃⵤÍÅ TCP/IP

 -¤ÍÁ¾ÔÇàµÍÃ캹à¤Ã×Í¢èÒ¡Ѻ Router áÅÐÍØ»¡Ã³ìàª×èÍÁµèÍÃÐËÇèÒ§à¤Ã×Í¢èÒ ÃÇÁ·Ñé§ Gateway

 -¡ÒÃàª×èÍÁµèÍÃÐËÇèÒ§ÍØ»¡Ã³ì Router ¡Ñº Router ´éÇ¡ѹ



ÃÙ»·Õè 4 áÊ´§¡ÒÃãªé¤ÓÊÑè§ Ping à¾×è͵ÃǨÊͺʶҹ¡Òóìàª×èÍÁµèÍ ÃÇÁ·Ñ駤èÒ¡Òõͺʹͧ¨Ò¡à¤Ã×èͧ»ÅÒ·ҧ

   ¤ÓÊÑè§ Ping äÁèà¾Õ§áµèÊÒÁÒöáÊ´§ ʶҹ¡Òóìàª×èÍÁµèÍÃÐËÇèÒ§à¤Ã×èͧÅÙ¡¢èÒ ËÃ×Í Router áÅéÇ áµèÂѧ ÊÒÁÒö¶Ù¡¹ÓÁÒãªéà¾×èÍ¡Òà ´Ù àÇÅҢͧ¡Òõͺʹͧ ¢Í§à¤Ã×èͧÅÙ¡¢èÒ à¾×èÍãËéÃÙéÇèÒ Ê¶Ò¹Ð¢Í§à¤Ã×Í¢èÒ ËÃ×ÍʶҹТͧà¤Ã×èͧÅÙ¡¢èÒ¹Ñé¹ à»ç¹ÍÂèÒ§äà ? ¹Í¡¨Ò¡¹Õé ¡ÒÃãªé Ping à»ç¹¡ÒÃÊÃéÒ§¡ÃÐáʢͧ Traffic º¹à¤Ã×Í¢èÒÂÃÐËÇèÒ§à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì2 à¤Ã×èͧ º¹à¤Ã×Í¢èÒÂä´é ;)

   ¨Ò¡ÃÙ»·Õè 4 áÊ´§ãËéàËç¹ÇèÒ áÁéÇèÒ¡ÒÃàª×èÍÁµèÍ ÃÐËÇèÒ§ à¤Ã×èͧÅÙ¡¢èÒ »ÅÒ·ҧ ¨Ðà»ç¹ä»µÒÁ»¡µÔ ·èÒ¹ÂѧÊÒÁÒöµÃǨÊͺ¾ºÇèÒ ¤èÒ Round Trip Time ¹Ñé¹ ÍÒ¨´ÙÊÙ§à¡Ô¹ä» «Öè§à»ç¹¡Òú觺͡ÇèÒ à¤Ã×èͧÅÙ¡¢èÒ»ÅÒ·ҧÍÂÙèä¡ÅÁÒ¡ ËÃ×ÍäÁè¡ç¡ÓÅѧÂØè§ÍÂÙè¡Ñº¡ÒÃãËéºÃÔ¡Òà ËÃ×ÍäÁè¡çà¤Ã×Í¢èÒ¢ͧà¤Ã×èͧ»ÅÒ·ҧ ¡ÓÅѧÂØè§ËÃ×Í¡ÒèÃҨõԴ¢Ñ´ Ê觼ÅãËé ¡ÒõͺÃѺ¢Í§¤ÓÊÑè§ Ping ¹Ñé¹ÅèÒªéÒ



ÃÙ»·Õè 5 ¤èÒ Round Trip Time ¢Í§ Ping ·Õèà¡Ô´¨Ò¡¡Òà Ping ¼èÒ¹ Router ä»Âѧ Host ·ÕèÍÂÙèËèÒ§¡Ñ¹¤¹ÅÐà¤Ã×Í¢èÒÂ

Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 05, 2005, 11:33:09 AM
StepFour
¡ÒÃãªé§Ò¹¤ÓÊÑè§ Ping º¹ Windows

      ¤ÓÊÑè§ Ping ÁÕ¡Ò÷ӧҹã¹ÅѡɳФÅéÒ¡Ѻà¤Ã×èͧ⫹èÒ ã¹àÃ×Í´Ó¹éÓ ·ÕèÁÕ¡ÒÃÊè§ÊÑ­­Ò³·ÕèàÃÕ¡ Ping ÍÍ¡ä» ¨Ò¡¹Ñé¹ ¡ç·Ó¡ÒõÃǨÊͺ¡ÒÃÊзé͹¡ÅѺ¢Í§¤Å×è¹ÊÑ­­Ò³ ÍÕ¡·Ñé§ÂѧÊÒÁÒöÇÑ´ÃÐÂзҧ¤ÇÒÁËèÒ§ ÃÐËÇèÒ§àÃ×Í´Ó¹éӡѺà»éÒËÁÒ»ÅÒ·ҧä´é

   *Êèǹ»ÃСͺ¡Ò÷ӧҹ¢Í§ Ping :D

1. Ping ãªéâ»ÃⵤÍÅ ICMP (Internet Control Message Protocol) «Öè§à»ç¹Ë¹Öè§ã¹ªØ´¢Í§â»ÃⵤÍŢͧ TCP/IP à¾×è͹ӾҢéÍÁÙÅ¢èÒÇÊÒÃä»Êè§ ÃÇÁ·Ñé§ÃѺ¢èÒÇÊÒáÅѺÁÒ¨Ò¡»ÅÒ·ҧ à¾×èÍÊè§ÁͺãËé¡Ñº·èÒ¹



ÃÙ»·Õè 6 áÊ´§¡ÒÃãªé Active sniffer à¾×èÍ´Ù¡Ò÷ӧҹ¢Í§ ICMP

2. ÊÔ觷Õè»ÃÒ¡¯ã¹ÅѡɳСÒÃÃÒ§ҹº¹Ë¹éҨͧ͢ Ping ä´éá¡è ʶҹ¡Òóìàª×èÍÁµèÍ áÅÐ ¤èÒ Round Trip Time â´Â¤èÒ¹Õé¨ÐàÃÔèÁ¹ÑºµÑé§áµèà¤Ã×èͧµé¹·Ò§Êè§ Ping ÍÍ¡ä» áÅÐä´éÃѺ¡ÒÃÊзé͹¡ÅѺÁÒ¤èÒ ¹ÕéÁÕ˹èÇÂà»ç¹ ms «Ö觨зÓãËé·èÒ¹ÊÒÁÒöÃÙéä´éÇèÒ»ÃÐÊÔ·¸ÔÀÒ¾¢Í§à¤Ã×Í¢èÒÂã¹¢³Ð¹Ñé¹ à»ç¹ÍÂèÒ§äÃ?

3. ¼ÅÅѾ¸ì·ÕèáÊ´§ÍÍ¡ÁÒº¹Ë¹éÒ¨Í ¨ÐᵡµèÒ§¡Ñ¹ÍÍ¡ä» ã¹áµèÅÐà¤Ã×èͧ µÑÇàÅ¢¢Í§¤èÒ Round Trip Time ÊÒÁÒöºÍ¡·èÒ¹ä´é´Ñ§¹Õé

   -ÃÐÂзҧ¤ÇÒÁËèÒ§¤Ô´à»ç¹¨Ó¹Ç¹ Hop â´Â´Ù¨Ò¡ ¤èҢͧ TTL ·Õèà»ÅÕè¹á»Å§ä»

   -àÇÅÒ·Õèãªé仡Ѻ¡ÒÃà´Ô¹·Ò§ÃÐËÇèÒ§·èÒ¹¡Ñº¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ ËÒ¡¤èҢͧàÇÅÒÂÔè§ÁÒ¡ ÂÔ觺觺͡¶Ö§»ÃÐÊÔ·¸ÔÀÒ¾·Õè´éÍÂŧ¢Í§à¤Ã×Í¢èÒ ËÃ×Íà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃìà¤Ã×èͧ¹Ñé¹ ÁÕ¤ÇÒÁ¾ÃéÍÁÊÑ¡à¾Õ§㴠´éÇÂà˵عÕé·èÒ¹¤Çà Ping à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃìËÅÒÂà¤Ã×èͧ à¾×èÍ´Ù¤èÒᵡµèÒ§

µÒÃÒ§·Õè 1 ¡ÒÃãªé¤ÓÊÑè§ Ping  ;)


 
ËÒ¡ Ping äÁèãËé¢èÒÇÊÒ÷ÕèáÊ´§ÇèÒÁÕ¡Òõͺʹͧ  Huh

ÅѡɳТͧ¢èÒÇÊÒ÷ÕèáÊ´§ÇèÒ à¡Ô´»Ñ­ËÒ ÁÕÁÒ¡ÁÒÂËÅÒ»ÃСÒà àªè¹ Error Message ´Ñ§µèÍ仹Õé

   -Request Time Out - áÊ´§ÇèÒ à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ äÁèÁÕµÑǵ¹ ËÃ×ÍÂѧäÁèä´éàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ ËÃ×Í »Ñ­ËÒà¡ÕèÂǡѺ¡ÒÃàª×èÍÁµèÍ ËÃ×Í ÍÂÙèËèÒ§ÁÒ¡à¡Ô¹ä» ÁÕ¤èÒ Delay ÁÒ¡àÊÕ¨¹ à¡Ô´ Time Out

   -Destination Unreachable - à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ ÍÂÙèä¡Åà¡Ô¹ä» ÁÕ Delay ÁÒ¡ä» ËÃ×Íà¤Ã×Í¢èÒ·Õèà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ µÔ´µÑé§ÍÂÙè ÁջѭËÒµÔ´¢Ñ´

   -ÁÕ¢éͤÇÒÁ Reply From ºéÒ§ Request Time Out ºéÒ§ 㹡Òà Ping à¾Õ§¤ÃÑé§à´ÕÂÇ áÊ´§¶Ö§»Ñ­ËҢͧ»ÃÐÊÔ·¸ÔÀÒ¾à¤Ã×Í¢èÒ ÃÇÁ·Ñé§ ÁջѭËÒ ¢Í§â»ÃⵤÍÅà¡Ô´¢Öé¹ ¹Í¡¨Ò¡¹Õé ¡ÒÃà¡Ô´ Delay áÅФÇÒÁäÁèá¹è¹Í¹ ã¹´éÒ¹¤ÇÒÁ¾ÃéÍÁ¢Í§à¤Ã×èͧ»ÅÒ·ҧ ¡çà»ç¹ÊÒà˵ØËÅÑ¡ àªè¹à´ÕÂǡѹ à¾×èÍãËéÁÑè¹ã¨ÇèÒ ÍÒ¨à»ç¹»Ñ­ËҢͧà¤Ã×Í¢èÒ ËÃ×ͤÇÒÁäÁè¾ÃéÍÁ¢Í§à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì»ÅÒ·ҧ ãËéãªé¤ÓÊÑè§ Ping - t à¾×èÍ Ping ÍÂèÒ§µèÍà¹×èͧ áÅéǵÃǨÊͺ´ÙÇèÒ ÁÕ¤ÃÑé§ã´ºéÒ§·ÕèÁÕ ·Ñé§ Request Time Out ÃÇÁ·Ñé§ Reply From ..... ËÃ×Í Destination Unreachable ºéÒ§ ËÒ¡ÁÕ ãËéÅͧ àªè¹¹Õé ¡Ñºà¤Ã×èͧÍ×è¹æ ã¹àÇÅÒà´ÕÂǡѹ ËÒ¡ à¤Ã×èͧÍ×è¹ÁÕÍÒ¡ÒÃà´ÕÂǡѹ ÁÕ¤ÇÒÁà»ç¹ä´éÍÂèÒ§ÁÒ¡ ·ÕèÃкºà¤Ã×Í¢èÒ¹Õé «Öè§ËÒ¡ãªé Shared Hub ¨Ðà»ç¹ »Ñ­ËÒ¤èÒ Round Trip Delay à¡Ô¹Áҵðҹ áµèËÒ¡à»ç¹ Switching Hub ¡çà»ç¹ä»ä´é·Õè ÁջѭËÒ ¡ÒÃàª×èÍÁµèÍ Switches Hub ËÅÒ Hub ÁÒ¡à¡Ô¹ä» ·ÓãËéà¡Ô´ Delay ÊÙ§ ÃÇÁ·Ñ駻ÃÐÊÔ·¸ÔÀÒ¾¢Í§à¤Ã×Í¢èÒÂŴŧ

   -ª×èͧ͢à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì



ÃÙ»·Õè 7 áÊ´§ÅѡɳСÒÃÊÙ­àÊÕ¡ÒõԴµèͨҡà¤Ã×èͧ»ÅÒ·ҧ à¹×èͧ¨Ò¡ÁÕ Delay ÁÒ¡à¡Ô¹ä»



ÃÙ»·Õè 8 áÊ´§ÅѡɳлѭËҢͧ Host ·ÕèÁջѭËÒ¤ÇÒÁäÁè¾ÃéÍÁ áÅÐÁÕ Delay ÁÒ¡ ÃÇÁ·Ñé§à¤Ã×Í¢èÒÂÁջѭËÒ


Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 05, 2005, 11:34:11 AM
StepFive
¡ÒÃãªé¤ÓÊÑè§à¾×è͵ÃǨÊͺ¤ÇÒÁàÃÕºÃéÍ¢ͧ¤èÒ Configuration ¢Í§à¤Ã×Í¢èÒÂ

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ÃÙ»·Õè 9 áÊ´§Ë¹éÒ¨Í ·ÕèáÊ´§â´Â¡ÒÃãªé¤ÓÊÑè§ ipconfig /all

ipconfig/all à»ç¹¤ÓÊÑ觷Õè·ÓãËé·èÒ¹ÊÒÁöµÃǨÊͺ´Ù ¤èÒ Configure µèÒ§æ ¢Í§à¤Ã×èͧ ÃÇÁ·Ñé§à¤Ã×Í¢èÒ ¤ÓÊÑ觹Õé ¨ÐãËé·èÒ¹ä´é·ÃÒº¢éÍÁÙÅ áÅÐÊÒÁÒöµÃǨÊͺ àÁ×èÍã´·Õèà¡Ô´»Ñ­ËÒ¢Öé¹ ´Ñ§¹Õé

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      ¤èÒ·ÕèáÊ´§º¹Ë¹éÒ¨Í ¨Ò¡ IPCONFIG ºÍ¡ÍÐäôÕæ à¡ÕèÂǡѺ¡Òà Troubleshooting á¡èàÃÒ ´Ñ§¹Õé  :D

   1. àÅ¢ËÁÒ Address ¢Í§ LAN Card - 㹡óշÕè·èÒ¹äÁèÊÒÁÒöàª×èÍÁµè͡Ѻ¼Ùéã´ ÃÇÁ·Ñé§äÁèÊÒÁÒö Ping àºÍÃì IP Address ¢Í§à¤Ã×èͧ·èÒ¹àͧ ãËéµÃǨÊͺ´Ù Physical Address «Ö觡ç¤×Í Address ¢Í§ LAN Card ËÒ¡ äÁè»ÃÒ¡¯ÇèÒÁÕ ¡çáÊ´§ÇèÒ LAN Card äÁè·Ó§Ò¹ ËÃ×Í äÁè¾ÃéÍÁ·Õè¨Ð·Ó§Ò¹ áÅÐÍÒ¨à»ç¹à¾ÃÒÐÇèÒ ÂѧµÔ´µÑé§ Driver ãËé¡ÑºÁѹ äÁèàÃÕºÃéÍÂ

   2. àÅ¢ËÁÒ IP ¢Í§à¤Ã×èͧ¹Õé ¾ÃéÍÁ´éÇÂàÅ¢ËÁÒ Sub Netmask ÃÇÁ·Ñé§àÅ¢ËÁÒ¢ͧ Gateway - »¡µÔ ËÒ¡à¤Ã×èͧ¢Í§·èÒ¹ ÁÕ¡ÒÃàª×èÍÁµè͡Ѻ à¤Ã×Í¢èÒÂÍ×è¹æ ¼èÒ¹ Router ·èÒ¹ÊÒÁÒöµÃǨÊͺ´Ù ¤èÒ Default Gateway «Ö觨еéͧ»ÃÒ¡¯ ÍÂÙ躹˹éÒ¨Í à¹×èͧ¨Ò¡¤èÒ¹Õé áÊ´§ÇèÒ ·èÒ¹àª×èÍÁµè͡Ѻà¤Ã×Í¢èÒÂÍ×è¹æ ¼èÒ¹ Router áÅФèÒ¹Õé¡ç¤×ͤèÒ àºÍÃì IP Address ¢Í§ Router ¹Ñè¹àͧ ¹Í¡¨Ò¡¹Õé ·èÒ¹ÂѧÊÒÁÒöµÃǨÊͺ´Ùä´éÇèÒ à¤Ã×Í¢èÒ¢ͧ·èÒ¹ä´éÃѺ¡ÒèѴáºè§ Subnet ËÃ×ÍäÁè â´Â¡ÒôٷÕè ¤èÒ Subnet mask ËÒ¡à»ç¹àÅ¢·Õèŧ·éÒ´éÇ "0" àªè¹ 255.255.255.0 ¡çáÊ´§ÇèÒ à¤Ã×Í¢èÒ·Õè·èÒ¹ÍÒÈÑÂÍÂÙè äÁèä´é ÁÕ Subnet áµèÍÂèҧ㴠áµèËÒ¡ÁÕ¤èÒÍ×è¹ àªè¹ 255.255.255.224 áÊ´§ÇèÒ à¤Ã×Í¢èÒ¢ͧ·èÒ¹ ä´éÃѺ¡ÒèѴáºè§ Subnet à»ç¹·ÕèàÃÕºÃéÍÂ

   3. 㹡óշÕè·èÒ¹äÁèÊÒÁÒöµÔ´µèÍ ËÃ×Í Ping ¡Ñºà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃìã´æ áÁéáµèµ¹àͧ ·èÒ¹ÍÒ¨µéͧµÃǨÊͺ ´ÙàºÍÃì IP Address ¢Í§à¤Ã×èͧ ËÒ¡ µÃǨäÁ辺 ã¹ IPCONNFIG/all ãËé·èÒ¹µÃǨÊͺ´ÙÇèÒ DHCP Server Enable ÍÂÙèËÃ×ÍäÁè ËÒ¡ äÁèáÊ´§ÇèÒ ÁÕ¤ÇÒÁà»ç¹ä»ä´é ·Õè·èÒ¹ÂѧäÁèä´é¨Ñ´µÑé§àÅ¢ËÁÒ IP Address áµèËÒ¡ à¤Ã×èͧÍ×è¹æ ãªé DHCP Server à¾×èÍᨡ IP ÍÕ¡·Ñé§ DHCP »ÃÒ¡¯ã¹Ë¹éÒ¨Í IPCONFIG/all à»ç¹ Enable ÍÂÙè ¡çáÊ´§ÇèÒ ¡Ò÷Õè·èÒ¹äÁèä´éÃѺàºÍÃì IP Address ÍÒ¨à»ç¹ä»ä´é·Õè â»ÃⵤÍÅ·Õèª×èÍÇèÒ BOOTP äÁèÊÒÁÒöµÔ´µè͡Ѻ DHCP Server ´éÇÂà˵ؼÅã´à˵ؼÅ˹Öè§ ãËé·èÒ¹Åͧ Remove áÅÐ Reinstall TCP/IP ãËÁè áÅÐà¾×èÍãËéá¹èã¨ÇèÒ à¤Ã×èͧ¢Í§·èÒ¹·Ó§Ò¹»¡µÔ ·èÒ¹ÍÒ¨ãªé Network Monitor à¾×è͵ÃǨ¨Ñº´Ù¡ÒÃÊ×èÍÊÒÃÃÐËÇèÒ§·èÒ¹¡Ñº DHCP Server ¹Í¡¨Ò¡¹Õé ÂѧÁÕ¤ÇÒÁà»ç¹ä»ä´é·Õè à¤Ã×èͧ¢Í§·èÒ¹ ÍÂÙè¹Í¡ÃÐÂТͧ IP address ·Õè¡Ó˹´äÇéã¹ DHCP Server «Öè§ËÁÒ¤ÇÒÁÇèÒ IP Address ÍÒ¨ËÁ´â¤ÇµéÒ áÅéÇ¡çä´é

   4. 㹡óշÕè·èÒ¹äÁèÊÒÁÒöµÔ´µè͡Ѻ à¤Ã×Í¢èÒÂà¾×è͹ºéÒ¹ â´Â¼èÒ¹·Ò§ Router ·èÒ¹¡çÊÒÁÒöãªé IPCONFIG/all à¾×è͵ÃǨÊͺ´ÙÇèÒ Router ·Ó§Ò¹ÍÂÙèËÃ×ÍäÁè â´Â¡Òà Ping ä»·Õè àºÍÃì Default Gateway áÅÐà¾×èÍ¡ÒþÔÊÙ¨¹ìÇèÒ àºÍÃì Default Gateway ¶Ù¡µéͧËÃ×ÍäÁè ä´éÍÕ¡´éÇÂ

   5. ÂÔè§ä»¡ÇèÒ¹Ñé¹ àÅ¢ËÁÒ IP ¢Í§ DNS Server ¨ÐªèÇÂãËé·èÒ¹ÊÒÁÒöà¢éÒ¶Ö§ »Ñ­ËÒ ÇèÒ à¾ÃÒÐà˵Øã´ ·èÒ¹äÁèÊÒÁÒö Ping ª×èͤÍÁ¾ÔÇàµÍÃì º¹à¤Ã×Í¢èÒ ã¹àÁ×èÍ·èÒ¹µÔ´µÑé§ DNS Server äÇé ·èÒ¹¡çÊÒÁÒöµÃǨÊͺ¤ÇÒÁ¾ÃéÍÁ¢Í§ DNS Server º¹à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì·ÕèµÔ´µÑé§ Linux áÅÐ UNIX ·èÒ¹ÊÒÁÒöãªé¤ÓÊÑè§ IPCONFIG - a

Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 05, 2005, 11:35:28 AM
StepSix
¡ÒÃãªé¤ÓÊÑè§ Netstat



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ÃÙ»·Õè 11 áÊ´§Ê¶ÔµÔ¡Ò÷ӧҹ¢Í§ IP Protocol

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Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 05, 2005, 06:10:45 PM
StepSeven
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      ¡Ò÷ӧҹ¢Í§ Tracert ä´éá¡è¡Òà Ê觪ش¢Í§ ICMP Echo Request ÍÍ¡ä» ã¹¡ÒÃÃéͧ¢ÍáµèÅФÃÑ駨ÐÁÕ¡ÒÃà¾ÔèÁ¤èÒ TTL à»ç¹ 1 ¤èÒàÊÁÍ àÁ×èÍ Router µÑÇááä´éÃѺ¢èÒÇÊÒà Áѹ¨ÐÅ´¤èÒ TTL Å§ä» 1 ¤èÒ áÅÐàÁ×èÍã´·Õè¤èÒ TTL º¹¢èÒÇÊÒ÷ÕèÃéͧ¢Íà¢éÒÁÒàËÅ×ͤèÒ à»ç¹ 1 ¡çËÁÒ¤ÇÒÁÇèÒ¤èÒ TTL ¢Í§ Router ¨ÐÁÕ¤èÒà»ç¹ÈÙ¹Âì ¹Ñ蹤×Í ¨Ðà¡Ô´»Ñ­ËÒ·ÕèàÃÕ¡ÇèÒ "Time Exceed " ã¹ÅѡɳТͧ¢èÒÇÊÒûÃÒ¡¯·Õè˹éÒ¨Í ¢Í§à¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃì·ÕèÃéͧ¢Íä» ¤ÓÊÑ觢ͧ Tracert ÁÕÃٻẺ¡ÒÃãªé§Ò¹ ´Ñ§¹Õé  :D





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Re: ÁÒÃ٨ѡ Network ãËéÁÒ¡¢Ö鹡ÇèÒà´ÔÁ¾×é¹°Ò¹¸ÃÃÁ´Ò¨¹¢Ñé¹ÊÙ§áÅСÒÃá¡é»Ñ­ËÒ By: ZealKung Date: ԧҤ 05, 2005, 06:30:09 PM
StepEight
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ÊÒà赯 3 : â»ÃⵤÍÅ TCP/IP º¡¾Ãèͧ

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ÍÒ¡Òà # 4 à¤Ã×èͧ·ÕèÁջѭËÒäÁèÊÒÁÒö Ping ä»·Õè Default Gateway ËÃ×Í Router   ;D

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ÊÒà赯 2 : IP Address ËÃ×ͤèÒ Subnet mask ¢Í§à¤Ã×èͧ·ÕèÁջѭËÒ äÁè¶Ù¡µéͧ

ÊÒà赯 3 : àºÍÃì IP Address ¢Í§ Router ·Õèãªé㹡Òà Ping à¢éÒËÒ ÁÕ¤èÒäÁè¶Ù¡µéͧ

ÊÒà赯 4 : ¡ÒèѴ Configure Default Route äÁè¶Ù¡µéͧ

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ÊÒà赯 4 : DNS Server äÁè·Ó§Ò¹

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ÊÒà赯 2 : à¡Ô´»Ñ­ËÒ IP Address ª¹¡Ñ¹

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ÍÒ¡Òà #11 »ÃÐÊÔ·¸Ô¡Ò÷ӧҹ¢Í§à¤Ã×Í¢èÒÂÀÒÂãµé TCP/IP µèÓÁÒ¡    Kiss

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ÊÒà赯 1 : à¤Ã×èͧÊè§ Packet ä»Âѧ»ÅÒ·ҧ à¡Ô´»Ñ­ËÒ Delay ÁÒ¡ à¹×èͧ¨Ò¡ à¤Ã×Í¢èÒµԴ¢Ñ´ ÃÇÁ·Ñé§ Switching Hub ËÃ×Í Router ·Ó§Ò¹Ë¹Ñ¡ÁÒ¡ à¡Ô¹ä» ·ÓãËé ¡ÒõͺÃѺ (Acknowledge) ¢Í§à¤Ã×èͧ»ÅÒ·ҧ ÁÒªéÒ à¡Ô¹ä» ¨¹à¡Ô´ Time out à»ç¹à˵ØãËéÁÕ¡Òà Ê觢éÍÁÙÅ«éÓ æ ËÅÒ¤ÃÑé§

ÊÒà赯 2 : Packet à¡Ô´¤ÇÒÁàÊÕÂËÒ ¢³Ðà´Ô¹·Ò§ä»ÁÒËÒÊÙè¡Ñ¹ â´Â੾ÒФèÒ CRC ·Õèà¿ÃÁ¢éÍÁÙÅ à¡Ô´¤ÇÒÁ¼Ô´¾ÅÒ´ ·ÓãËé à¤Ã×èͧ·ÕèÊè§ Packet µéͧÊ觢éÍÁÙÅ«éÓÍÕ¡¤ÃÑé§

ÊÒà赯 3 : ¢éÍÁÙÅà¡ÕèÂǡѺ TCP à¡Ô´¤ÇÒÁ¼Ô´¾ÅÒ´ ·ÓãËéµéͧÊ觢éÍ·ÙÅ«éÓ

ÊÒà赯 4 : ªÔé¹Êèǹ¢Í§ Packet ·Õè¼èÒ¹¡ÒÃ·Ó Fragments ÁÕºÒ§Êèǹ·ÕèÊÙ­ËÒÂä»

ÊÒà赯 5 : à¡Ô´»Ñ­ËÒ Overflow ·Õèà¤Ã×èͧÃѺ

ÊÒà赯 6 : ¡ÒõͺÃѺ´éÇ Acknowledge ¢Í§à¤Ã×èͧÃѺ ÁÒªéÒà¡Ô¹ä» ·ÓãËé µéͧÊè§ Packet «éÓ

µÒÃÒ§·Õè 4 Troubleshooting »Ñ­ËÒ¡ÒÃàª×èÍÁµèÍ TCP/IP




The End
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