Welcome to Bucaro TecHelp!

Bucaro TecHelp
Maintain Your Computer and Use it More Effectively
to Design a Web Site and Make Money on the Web

About Bucaro TecHelp About BTH User Agreement User Agreement Privacy Policy Privacy Site Map Site Map Contact Bucaro TecHelp Contact RSS News Feeds News Feeds

Each year 1.5 million shelter animals are euthanized (670,000 dogs and 860,000 cats). Source: ASPCA. The solution is not to shelter unwanted pets, but to SHUT DOWN THE PET MILLS. Anyone who wants a pet will just have to adapt a great pet from a shelter.

Holiday Gift Guide
Holiday Gift Guide

What is the Difference Between NAT and PAT?

The main purpose for NAT (Network Address Translation) is to hide internal network IP addresses from the external Internet for security reasons. It works by mapping a pool of public IP addresses one-to-one to the private internal IP addresses, keeping the port number intact.

Internal AddressExternal Address
10.10.10.1:8063.63.63.1:8000
10.10.10.2:8063.63.63.1:8001
10.10.10.3:8063.63.63.1:8002
10.10.10.4:8063.63.63.1:8003

A port number identifies a specific protocol or process on a host to which a message or datagram is to be delivered. PAT (Port Address Translation) uses a single public IP address and maps multiple inside addresses to it by using different port numbers.

Most routers actually use NAPT (Network Address and Port Translation), which translates not only IP addresses, but also TCP and UDP port numbers.

An additional advantage of NAT is that by allowing multiple computers to connect to the Internet through a single external IP address it reduces the cost for connecting to the Internet. It also helped to extend the life of dwindling number of IPv4 addresses until IPv6 could be implemented.

More Network Troubleshooting and Support Articles:
• Small Business Server Migration Guide
• Nine Tips for Designing a Small Business Network
• Structured Cabling - A Detailed Tutorial and Even More!
• Questions to Ask Before Beginning Network Design
• Everything You Need To Know About LAN Backbone Cabling
• Network Problem Troubleshooting Flowchart
• How to Design a Highly Reliable Fiber Optic Network
• Steps For Designing a Crisis Management Plan
• VPN and VPN Protocols
• Five Network Design Considerations

RSS Feed RSS Feed


Follow Stephen Bucaro Follow @Stephen Bucaro


Computer Networking Sections

Fire HD
[Site User Agreement] [Privacy Policy] [Site map] [Search This Site] [Contact Form]
Copyright©2001-2017 Bucaro TecHelp 13771 N Fountain Hills Blvd Suite 114-248 Fountain Hills, AZ 85268