New Training: IP Routing and Forwarding

In this 12-video skill, CBT Nuggets trainer Keith Barker walks you through the concepts of routing, such as static and dynamic routes, network address translation (NAT), and access control lists (ACLs). Watch this new networking training.

Watch the full course: CompTIA Network+

This training includes:

• 12 videos

• 56 minutes of training

You’ll learn these topics in this skill:

• IP Routing and Forwarding: Introduction to IP Routing

• IP Routing and Forwarding: How to Train a Router

• IP Routing and Forwarding: Options for Static Routes

• IP Routing and Forwarding: Configuring Static Routes

• IP Routing and Forwarding: Dynamic Routing Protocol Overview

• IP Routing and Forwarding: Dynamic Routing Protocol Demonstration

• IP Routing and Forwarding: Address Translation with PAT

• IP Routing and Forwarding: One-to-one Translations with NAT

• IP Routing and Forwarding: Using Wireshark to Verify IP Translations

• IP Routing and Forwarding: Access Control Lists

• IP Routing and Forwarding: ACL Demonstration

• IP Routing and Forwarding: Enterprise Network Forwarding

What is NAT?

The internet works by connecting a lot of different networks together. Networks use IP addresses to send data back and forth. Those IP addresses tell networks where data is being sent to and from. There is only a finite amount of IP addresses available, though. So, each device connected to the internet cannot have its own unique IP address. This is when NAT is used.

NAT stands for network address translation. It is a protocol that sits at the edge of a network such as a router. Internal network-connected devices connect to routers for internet access. That router passes traffic from the internal network out into the public internet. NAT translates the internal network IP address to a unique, public IP address. Likewise, when data comes back into a network, the NAT protocol forwards that information back to the specific device that requested it. In this way, NAT keeps a running list of which devices are communicating with specific internet resources so data can be transferred from an internal device to the public internet and back again properly.