In this video, Bill Ferguson explains the four steps used to standardize your thinking about any IP addressing problem. Learn how to apply the four-step method in example scenarios.
- [Instructor] You can solve any subnetting problem…using four steps.…The four steps of the Four Step Method are,…number one, where am I now?…Where am I now is going to be answered…by the subnet mask.…Determining where I am is very important…to determining where I need to go from there…to create subnet bits and leave host bits.…
The second step is how many subnet bits do I need?…That's going to be determined…by the same formula that was used…by the original designers of the internet,…and I'll demonstrate that.…The third of the four steps…is to identify the bits and the bit values,…so we can determine the subnet mask.…So, we'll start off from where we are…when we begin to subnet,…and we'll be always moving…from the left toward the right,…identifying the subnet bits…and adding the bit values…to determine the subnet mask.…
Always moving from the left toward the right.…Then the fourth step is,…how many bits are left for the hosts?…So, after we've determined the subnet bits,…then it's just a matter of…how many bits are left for the hosts,…
Discover how IP addresses are constructed and how to understand them better by relating them to a picture rather than converting binary numbers or memorizing charts. Learn the benefits that subnetting in your head provides in every aspect of IT networking, including routing protocols, access control lists, and network address translation. Then walk through Bill's four-step method, which leverages the rules that were used to create the original classful IP addressing schemes. Using this method, students can learn to "see" the IP addresses for each subnet. Watch the technique in action, and then practice what you've learned using the audio guides in chapter five, which provide auditory cues as you subnet in your head.
- The benefits of subnetting
- Class A, B, and C IP addressing
- The four-step subnetting method
- Troubleshooting IP topologies and IP host address ranges
- Audio cues for the four-step method