NAT and PAT power almost every home and enterprise network. In this video I show you, step by step, how private RFC1918 addresses are translated to public addresses, why IPv4 exhaustion forced us to use NAT, how Cisco’s inside-local and inside-global terms actually map to packets, and I prove it all live with Wireshark and tshark.
You’ll learn:
• NAT vs PAT in plain English
• The three RFC1918 ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16
• Why IPv4 ran out and how NAT delayed disaster
• Why ISPs block private ranges on the internet
• IPv6 usually doesn’t need NAT
• Cisco’s inside local, inside global, outside local, outside global explained with a capture
• Packet-by-packet proof using Wireshark and tshark
Perfect for CCNA students, junior network engineers, and anyone who wants to finally understand what their router is doing.
// Playlist to CCNA Course REFERENCE //
https://www.youtube.com/watch?v=tj3yCZWOWYc&list=PLw6kwOJVj3MbMZ8B72ZgUryj8OSETC0ds
// David's SOCIAL //
Discord: https://discord.com/invite/usKSyzb
X: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
TikTok: http://tiktok.com/@davidbombal
YouTube: https://www.youtube.com/@davidbombal
Spotify: https://open.spotify.com/show/3f6k6gERfuriI96efWWLQQ
SoundCloud: https://soundcloud.com/davidbombal
Apple Podcast: https://podcasts.apple.com/us/podcast/david-bombal/id1466865532
// MY STUFF //
https://www.amazon.com/shop/davidbombal
// SPONSORS //
Interested in sponsoring my videos? Reach out to my team here: sponsors@davidbombal.com
// MENU //
0:00 – Intro
0:40 - Looking at the IP Address
01:37 - Carrier-Grade Nat
02:50 - Private & Public Addresses
04:43 - Class A Addresses
05:15 - Running Out of Addresses
06:50 - What Stops Access to the Internet
07:50 - Terms you Should Know
09:30 - Terminology (Topology)
14:53 - Practical Demo Starts
16:25 - Capturing Traffic
18:49 - Conclusion
Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel!
Disclaimer: This video is for educational purposes only.
#nat #networking #ccna