Summary DNS DNS Alexandra Tolbert Benefits How It Works Basics Katherine Barrios DNS Parts Phillip...
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Transcript of Summary DNS DNS Alexandra Tolbert Benefits How It Works Basics Katherine Barrios DNS Parts Phillip...
![Page 1: Summary DNS DNS Alexandra Tolbert Benefits How It Works Basics Katherine Barrios DNS Parts Phillip Nelson.](https://reader033.fdocuments.us/reader033/viewer/2022051401/5697bf8d1a28abf838c8c338/html5/thumbnails/1.jpg)
Summary
DNSDOMAIN NAME SYSTEM
AlexandraTolbertBenefitsHow It WorksBasics
Katherine BarriosDNS Parts
Phillip Nelson
![Page 2: Summary DNS DNS Alexandra Tolbert Benefits How It Works Basics Katherine Barrios DNS Parts Phillip Nelson.](https://reader033.fdocuments.us/reader033/viewer/2022051401/5697bf8d1a28abf838c8c338/html5/thumbnails/2.jpg)
DNS is the foundation for name resolution in a TCP/IP
network
BASICS
Used most by web browsers a
nd email programs
Locates servers
Makes a user friendly name of a computer to
it’s IP address
DNS is commonly asso
ciated with the Internet
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DNS is commonly asso
ciated with the Internet
![Page 4: Summary DNS DNS Alexandra Tolbert Benefits How It Works Basics Katherine Barrios DNS Parts Phillip Nelson.](https://reader033.fdocuments.us/reader033/viewer/2022051401/5697bf8d1a28abf838c8c338/html5/thumbnails/4.jpg)
Server names remain constant
Server names remain constant
Easier to remember than numeric IP addressesConvenience
Consistency
Simplicity
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“.”
com.edu. us.org.
lsu.edu. google.com. gov.us.
Domain Name Space
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lsu.edu.
moodle2.lsu.edu. business.lsu.edu. isds.lsu.edu.
Domain Name Space
computer1.business.lsu.edu.server1.business.lsu.edu.
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“.”
com.edu. us.org.
lsu.edu.
moodle2.lsu.edu. business.lsu.edu. isds.lsu.edu.
lsu.edu.
business.lsu.edu. webserver1.business.lsu.edu.
webserver1.business.lsu.edu.
Domain Name Space
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webserver1.business.lsu.edu.webserver1.business.lsu.edu.webserver1.business.lsu.edu.webserver1.business.lsu.edu.webserver1.business.lsu.edu.webserver1.business.lsu.edu.
Host Sub Domain
2nd Level Domain
Top Level
Domain
Root
Domain Name Space
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lsu.edu.
moodle2.lsu.edu. business.lsu.edu.isds.lsu.edu.
Zones
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Name Server
lsu.edu.
moodle2.lsu.edu.business.lsu.edu.
isds.lsu.edu.
Name ServerPrimary Zone Database File
Secondary Zone database file
Name Server
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Name Resolution Process
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“Hey, I need directions to
http://www.lsu.edu”
Client
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“ The domain name www.lsu.edu is not in my database or cache. I’ll try another DNS server.”
Local Server
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“I have authority to find that address! I will send a list of IP addresses for the edu. domain”
RootServer
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RootServer
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“Great! I’ll ask edu. For the correct address.”
Local Server
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“Here is the IP address to the requested site.”
Lsu.edu Server
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“Thanks! I will forward this to the client and keep the address in my cache for awhile.”
Local Server
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“Thanks for the directions! Now to pay my fee bill on lsu.edu”
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User Friendly Name (Host Name) IP Address
Apple.com 17.149.160.49
Koofers.com 23.23.109.128
Microsoft.com 192.168.2.1
Pintrest.com 23.21.123.64
Twitter.com 199.59.148.10
Walmart.com 161.170.248.20