This document discusses Network Address Translation (NAT) and its various types and functions. It defines NAT as a method for routing traffic between a public network like the internet and private networks, allowing multiple private devices to share public IP addresses. The types of NAT covered are static NAT, dynamic NAT, and Port Address Translation (PAT). Advantages of NAT include conserving public IP addresses and increased network security, while disadvantages include complexity and lack of direct access to public networks for private devices.

1. Presented By
Md. Ashraful Islam Talukder
Md. Hannan Talukder
Rakib Hossain
Fowjael Ahamed
Abu Kaiser Mohammad Masum

2. What is NAT
Public Network Private Network
Class
IP Addresses
From To
Class A 10.0.0.0 10.255.255.255
Class B 172.16.0.0 172.31.255.255
Class C 192.168.0.0 192.168.255.255
Private Network RangeWorking Principles of NAT Device

3. NAT
Static Dynamic PAT
(Port Address Translation)
What is Static NAT
How does Static NAT works

4.  What is Dynamic NAT?
How exactly Dynamic NAT worksHow NAT Translation Take Place

5. What is PAT
How does it work
 Advantages:
 Conserving precious public IP addresses
 Hosts don’t have to expose their private IP
addresses
 Disadvantages:
 Can’t keep track on user if hosts number rises
 A single IP address can’t easily run same type of
public service

6.  Advantages of NAT:
 Network security
 IP address sharing
 ISP services
 Legally addressing
 Allows multiple devices
 Disadvantages of NAT:
 Complexity
 Switching path delay
 Lack of public IP
 Poor support
 High price
Security Awareness
1. NAT Firewall 2. VPN
Final Words about NAT