network address translation pdf
TRANSCRIPT
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NETWORK ADDRESS TRANSLATION
HOW NAT WORKS AND WHY WE NEED IT?
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RESEARCHERS IN 1978
IP ADDRESS
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SIZE OF IP ADDRESS
IP ADDRESS
Sender IP
Receiver IP
Data Packet
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PROBLEM
IP ADDRESS SIZE Packet Size Amount of IP Address
2 Bit IP address
256 Bit IP address
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SOLUTION
32 BIT IP ADDRESS
32 Bit IP address
4,294,967,296 IP Address
IP Version 4
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4.2 Billion IP Address
8 Billion People
Multiple Devices
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SOLUTION
NETWORK ADDRESS TRANSLATION
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Ram’s Laptop
Rina’s Laptop
Smartphone
Home Router
Internet12.13.14.15
Public IP Address
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Internet
Private IP Address
192.168.1.2
192.168.1.3
192.168.1.4
192.168.1.1
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IP ADDRESS
192.168.x.x
10.x.x.x
Reserved for Private Networks
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Internet192.168.1.3 192.168.1.1
Public
Private
40.30.20.10
192.168.1.3:42301 TO 40.30.20.10:80 WHAT IS THE CURRENT MATCH SCORE IND VS AUS?
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Internet192.168.1.3 192.168.1.1
Public
Private
40.30.20.10
40.30.20.10:80 TO 192.168.1.3:42301 IND 300/5 43.1 OVERS
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Internet192.168.1.3 192.168.1.1
Public
Private
40.30.20.10
12.13.14.15:24604 TO 40.30.20.10:80 WHAT IS THE CURRENT MATCH SCORE IND VS AUS?
12.13.14.15
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Internet192.168.1.3 192.168.1.1
Public
Private
40.30.20.10
40.30.20.10:80 TO 12.13.14.15:24604 IND 300/5 43.1 OVERS
12.13.14.15
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Internet192.168.1.3 192.168.1.1
Public
Private
40.30.20.10
40.30.20.10:80 TO 192.168.1.3:42301 IND 300/5 43.1 OVERS
12.13.14.15
NAT IS TRANSPARENT
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THE FUTURE
IP Version 6
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IP VERSION 6
IP Version 4
4,294,967,296 addresses 3.4x1038 addresses
No Need for NAT
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IP V4
IP V4
IP V4
IP V4
IP V4
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QUESTIONS?THANK YOU