If you cannot find that exact title, these are equally good and free:
| Title | Author / Source | |--------|----------------| | IP Addressing and Subnetting – Workbook | Cisco / Todd Lammle | | Subnetting Secrets | Matt Conran (free PDF) | | Learn to Subnet | Jeremy’s IT Lab (free study guide) | | IPv4 Subnetting – A Beginner’s Guide | David Bombal / GNS3 Academy (free with email) | ip subnetting from zero to guru pdf
| CIDR | Mask | Hosts |
|------|---------------|-------|
| /24 | 255.255.255.0 | 254 |
| /25 | 255.255.255.128 | 126 |
| /26 | 255.255.255.192 | 62 |
| /27 | 255.255.255.224 | 30 |
| /28 | 255.255.255.240 | 14 |
| /29 | 255.255.255.248 | 6 |
| /30 | 255.255.255.252 | 2 | If you cannot find that exact title, these
Before you can split a network, you must understand the building blocks. Do not skip this section. Gurus are gurus because they mastered the basics. Now you are fast
Now you are fast. You can subnet a /19 in your head. But gurus have three extra weapons.
Instead of writing 255.255.255.0, we write /24. That number is the count of bits locked to the network side.