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DNS โ€“ Domain Name System ืžื‘ื•ื
ืžื” ื–ื” ื‘ื›ืœืœ  DNS  ? ,[object Object],[object Object],[object Object]
ืงื•ื‘ืฅ  Hosts ,[object Object],[object Object]
ืžืืคื™ื™ื ื™ื ืขื™ืงืจื™ื™ื ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืื™ืš ื–ื” ืขื•ื‘ื“ ? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Domains  -  ืชื—ื•ืžื™ื ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืžื‘ื ื” ืฉื  DNS ,[object Object],[object Object],[object Object],[object Object]
ื›ื™ืฆื“ ืžืืชืจื™ื ืฉื ื‘  DNS  ? ,[object Object],[object Object],[object Object]
Root ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืื™ืชื•ืจ ื›ืชื•ื‘ืช ืœืคื™ ืฉื โ€“ ื”ื”ืชื—ืœื” Internet Cool.com IP: 200.1.8.X DNS IP: 200.1.8.30 IP: 200.1.8.101 www.magniv.com ื”ืžืชืŸ ... ืื ื™ ืžื‘ืจืจ ... ืœืฉืจืช  Root ื›ืœืฉื”ื• ื ืชื•ื ื™ื : www.cool.com: 200.1.8.101 Root servers: 62.5.10.3 78.15.0.52 โ€ฆ IP: 200.1.8.4 DNS: 200.1.8.30 WWW
ืื™ืชื•ืจ ื›ืชื•ื‘ืช ืœืคื™ ืฉื โ€“ ื”ืžืฉืš Internet Cool.com IP: 200.1.8.X ROOT Com Com Net ROOT Magniv.com IP: 120.18.3.X DNS WWW ื ืชื•ื ื™ื : www.magniv.com: 120.18.3.15 โ€ฆ IP: 120.18.3.80 IP: 120.18.3.15 IP: 196.12.0.8 IP: 62.68.53.120 IP: 78.15.0.52 IP: 62.5.10.3 1 5 2 3 4 DNS WWW ื ืชื•ื ื™ื : dns.magniv.com: 120.18.3.80 โ€ฆ ื ืชื•ื ื™ื : Com: 196.12.0.8, 62.68.53.120 โ€ฆ
ื—ืœื•ืงืช ื”ืื—ืจื™ื•ืช ืœืื™ืชื•ืจ ืฉื ,[object Object],[object Object],[object Object],[object Object]
ื“ื•ืžื” :  Recursion and Iteration Internet Cool.com IP: 200.1.8.X ROOT Com Com Net ROOT Magniv.com IP: 120.18.3.X DNS WWW ื ืชื•ื ื™ื : www.magniv.com: 120.18.3.15 โ€ฆ IP: 120.18.3.80 IP: 120.18.3.15 IP: 196.12.0.8 IP: 62.68.53.120 IP: 78.15.0.52 IP: 62.5.10.3 DNS WWW ื ืชื•ื ื™ื : dns.magniv.com: 120.18.3.80 โ€ฆ ื ืชื•ื ื™ื : Com: 196.12.0.8, 62.68.53.120 โ€ฆ Recursive Query Iterative Queries Recursion
ืื—ืกื•ืŸ ืคื™ื–ื™ ื‘  DNS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืชืคืงื™ื“ื™ ืฉืจืชื™ื ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืชืงืฉื•ืจืช ื‘ืžืขืจื›ืช  DNS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืกื•ื’ื™  Zone ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืฆืขื“ ืงื“ื™ืžื” ,  ืฉื ื™ื™ื ืื—ื•ืจื”  ( ืกืงื•ื‘ื™ื“ื• ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ื ื™ื”ื•ืœ ื‘ืกื™ืก ื”ื ืชื•ื ื™ื ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืกื•ื’ื™ ืจืฉื•ืžื•ืช ื‘  DNS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ืฉื™ืžื•ืฉ ื‘ืžื˜ืžื•ืŸ ื‘  DNS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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DNS - Domain Name System.pps

  • 1. DNS โ€“ Domain Name System ืžื‘ื•ื
  • 2.
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  • 10. ืื™ืชื•ืจ ื›ืชื•ื‘ืช ืœืคื™ ืฉื โ€“ ื”ื”ืชื—ืœื” Internet Cool.com IP: 200.1.8.X DNS IP: 200.1.8.30 IP: 200.1.8.101 www.magniv.com ื”ืžืชืŸ ... ืื ื™ ืžื‘ืจืจ ... ืœืฉืจืช Root ื›ืœืฉื”ื• ื ืชื•ื ื™ื : www.cool.com: 200.1.8.101 Root servers: 62.5.10.3 78.15.0.52 โ€ฆ IP: 200.1.8.4 DNS: 200.1.8.30 WWW
  • 11. ืื™ืชื•ืจ ื›ืชื•ื‘ืช ืœืคื™ ืฉื โ€“ ื”ืžืฉืš Internet Cool.com IP: 200.1.8.X ROOT Com Com Net ROOT Magniv.com IP: 120.18.3.X DNS WWW ื ืชื•ื ื™ื : www.magniv.com: 120.18.3.15 โ€ฆ IP: 120.18.3.80 IP: 120.18.3.15 IP: 196.12.0.8 IP: 62.68.53.120 IP: 78.15.0.52 IP: 62.5.10.3 1 5 2 3 4 DNS WWW ื ืชื•ื ื™ื : dns.magniv.com: 120.18.3.80 โ€ฆ ื ืชื•ื ื™ื : Com: 196.12.0.8, 62.68.53.120 โ€ฆ
  • 12.
  • 13. ื“ื•ืžื” : Recursion and Iteration Internet Cool.com IP: 200.1.8.X ROOT Com Com Net ROOT Magniv.com IP: 120.18.3.X DNS WWW ื ืชื•ื ื™ื : www.magniv.com: 120.18.3.15 โ€ฆ IP: 120.18.3.80 IP: 120.18.3.15 IP: 196.12.0.8 IP: 62.68.53.120 IP: 78.15.0.52 IP: 62.5.10.3 DNS WWW ื ืชื•ื ื™ื : dns.magniv.com: 120.18.3.80 โ€ฆ ื ืชื•ื ื™ื : Com: 196.12.0.8, 62.68.53.120 โ€ฆ Recursive Query Iterative Queries Recursion
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