From the course: ISC2 Certified Information Systems Security Professional (CISSP) (2024) Cert Prep

Unlock this course with a free trial

Join today to access over 23,400 courses taught by industry experts.

Subnetting

Subnetting

From the course: ISC2 Certified Information Systems Security Professional (CISSP) (2024) Cert Prep

Start my 1-month free trial Buy for my team

Subnetting

“

- [Instructor] It's fairly common for organizations to want to subdivide their networks into smaller pieces for manageability purposes. This is where IP subnetting can provide an effective solution. Subnetting breaks a large network address space up into manageable pieces that administrators may assign to smaller subnetworks. For example, assume that you are using the 192.168.0.0 private address space on your network. You might have a network that looks something like this with different departments connected to different geographic regions. Instead of haphazardly assigning addresses throughout your network, you might decide that you want to use subnetworks. The 192.168 address space normally has the dividing line between network and host addresses here, giving us a single network with over 65,000 possible host addresses. If we shift the dividing line here, we now have 256 possible subnetworks with 254 possible hosts each. We go from one network with over 65,000 hosts to 256 networks…

Contents