Network Address Translation is a great protocol, but you need to understand when you should use static Network Address Translation, Dynamic Network Address Translation, or NAT Overload, also called Port Address Translation, because we use the Transport layer port numbers to differentiate between sessions in the network address translation table.
- [Teacher] Alright, let's go ahead and talk…about the most popular type of NAT, and that is…Port Address Translation, or NAT overloading.…The reason we would use this is, we typically have…one address we get from our ISP and we want to have…multiple users get out using the same address.…Let's go ahead and take a look at the configuration,…then we'll run out and do it.…First, remember, always check your interfaces.…Now I know I've been putting these in order…as one, two, three, four...…That's the Cisco objectives, how they do it, that's…not really necessary as long as you just get them all.…
So our number one, then check this out,…ip nat inside source list 1.…So so far, it looks like we're doing dynamic NAT.…True, same command.…ip nat inside source, list 1 can use interface,…my outside interface, which is my outside local,…so we're saying use that IP address…on gigabit zero one, here it is, right here,…everyone's gonna use that and overload it.…Now if I don't put the keyword overload,…I can press Enter and I'm just doing dynamic NAT.…
For more information on the CCENT exam, visit Cisco's website.
- Overview of internetworking
- The TCP/IP networking model
- Easy subnetting
- Managing Cisco IOS
- Managing Cisco networks and devices
- IP routing
- Layer 2 switching
- VLANs and InterVLAN routing
- Network address translation
Skill Level Intermediate
Internetworking devices4m 20s
3. Introduction to TCP/IP
4. Easy Subnetting
5. VLSM, Summarization, and Troubleshooting TCP/IP
6. Cisco Internetworking Operating System (IOS)
7. Managing a Cisco Internetwork
8. IP Routing
9. Layer 2 Switching
10. VLANs and InterVLAN Routing (IVR)
12. Network Address Translation (NAT)
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