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Domain Name Resolution with the Domain Name System PowerPoint Presentation
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Domain Name Resolution with the Domain Name System - PowerPoint PPT Presentation


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Domain Name Resolution with the Domain Name System. “I want to visit abc.com.”. 1. http://abc.com “Please find abc.com and show it to me.”. 6. ISP (BellSouth). 4. 2. “Do we already know where abc.com is?”. 5. Caching Name Server Operated by ISP. Web Server hosting the abc.com web site

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Presentation Transcript
slide1

Domain Name Resolution with the Domain Name System

“I want to visit abc.com.”

1

http://abc.com

“Please find abc.com and show it to me.”

6

ISP (BellSouth)

4

2

“Do we already know where abc.com is?”

5

Caching Name Server Operated by ISP

Web Server hosting the abc.com

web site

at IP address 12.231.87.9

“Yes. Here’s the IP address for abc.com:

12.231.87.9.”

3

slide2

Domain Name Resolution with the Domain Name System

“The name server xyz.net has the IP address of abc.com. Here’s the IP address of that name server: 43.75.241.2. Talk to it.”

Root Server

“I want to visit abc.com.”

1

Name Server xyz.net at

IP address 43.75.241.2

http://abc.com

“Please find abc.com and show it to me.”

4

10

ISP (AOL)

“Here’s the IP address of abc.com:

12.231.87.9.”

6

8

2

“Do we already know where abc.com is?”

7

3

9

“No. We need to look that up. Root server, can you help us?”

Caching Name Server Operated by ISP

Web Server hosting the abc.com

web site

at IP address 12.231.87.9

5

“OK, name server at 43.75.241.2, what’s the IP address for abc.com?”