> For the complete documentation index, see [llms.txt](https://paul-gleason.gitbook.io/net-150-network-fundamentals/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://paul-gleason.gitbook.io/net-150-network-fundamentals/labs/lab-5.1-ip-subnet-mask.md).

# Lab 5.1: IP/Subnet Mask

### Summary

During this lab, I learned how to turn IP's and Subnet Masks into binary and understand the slash notation. As well as Idenity the Network ID and the host ID. To convert a single octet within an IP address you binary you first get the binary of the number you want then add 0's till you get to an 8-bit number. The network ID is the first 24-bits of the IP then the last 8-bits are the host ID. You can create a subnet ID by taking the host ID bits and turning it into the subnet ID by adding it to the network ID.