NAT Explained | Overload, Dynamic & Static

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What is NAT?

Network Address Translation (NAT) is used to convert private IP addresses to public IP addresses and vise versa.
The feature was introduced to prolong the life of IPv4 addresses. By using NAT you can convert all your private IP addresses to a single (or few) public address. This means a huge number of public addresses can be saved because the private addresses can be used over and over again in private networks across the world.

Types of NAT
There are three types of NAT, some more common than others but it’s a good idea to know exactly how each one works and how they can be used.

Static
Static NAT is when you manually assign each private IP address + port number a public IP address + port number. This could be used when running web server or mail serve.

Dynamic
The way Dynamic NAT works is by assigning each private IP to a public IP from a manually created pool of available public addresses.
You can use this to merge two networks with the same subnet together. You would configure the connecting routers to make the subnets appear to be different to what they actually are.

PAT (Overload)
Port Address Transaction (PAT) or Overload as it is often called is the most popular version used today.
The way PAT works is it converts the private address + port number to the public address + port number.

#ccna #cisco #networking

[yohaneranga]

I do not normally comment on videos, but as most of the viewers may agree with me, you deserve more subscribers. Your explanations are by far one of the best, even better than what they call industry experts. Keeping it simple and one explains one thing at a time makes it pretty stress free to watch and understand. Keep it up and I'm looking forward to see more advance networking concepts simplified.

[avengefulgamer]

This is a really great video. Im working on getting my CCNA and this really helped me understand how NAT works after school. thank you for the solid and slow paced information to let it sink in.

[rikvanbrugge]

By a guy with no IT background at all: already on my sixth video today. Very clear text, good voices, excellent animations. Thanks a lot!

[WarlordStarcraft]

Best explanation so far. Actually explaining the nat table is a refreshing after all the rest are just analogies

[guidowitt-dorring]

This is the first video I've seen that properly explains NAT. Most others are too superficial and skip some details that are crucial to understand for the system to logically make sense.

[TimonLevy]

Dude, this guy's voice is so calm I almost fell asleep watching this.

[PHTM]

I got a computing exam coming up, this video explained it flawlessly compared to the notes. Appreciate it bro! also subscribed :))

[bootygoblinthaseaman]

my textbook overexplains tf out of everything so thanks for this bud

[danteeep]

you explained better than any video on youtube ive checked so far.. thx

[tiramisu]

This is a solid explanation of different types of NATs. It has helped me solidify my understanding! Thanks.

[infinitelooping]

This video is a marvelous explanation of NAT, one of the bests I have ever seen. Well done

[nileshgujar]

You made it so easy to understand, as I read some articles and find myself scratching my head again n again ... Thank you

[andywarrier]

I am basically a dumb person, but mate, you make me feel intelligent and that is priceless for me. Thanks a ton and cheers!

[JP-wssv]

mate your videos are really good. your animation and voice really help simplify the essays ive read in CCNA books. thanks !

[schrodinger]

I am watching this because my class was cancelled because our school is closed because of the virus, therefor our teacher can't explan the content so he sent as the video.

[itaybarok]

Thanks. I understood the concept of NAT strongly now and why it is important.
Also, I know types of NAT like PAT NAT and static NAT and dynamic NAT.
Great and useful video.
Keep up with these good staff.

[shajondas]

Thank you!!! Your videos are below 10 minutes and in this short time you gave the concrete concept and so much information indeed . Thank you

[ransfordaddai]

Great video., NAT simplified. i recommend this video to anyone struggling to understand this concept. Kindly do more of this video. the graphics, explanation and top notch

[zangreiner]

6 years since this video was published and i can confirm that it is still a great video

[jimyork]

You took a somewhat mystifying concept and made it very easy to understand! Thanks!