
AWS Certified Advanced Networking – Specialty (ANS-C01) Certification Guide
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Subnetting is a unique skill that all network professionals must have, whether they love it or hate it. Network engineers must have the ability to carve up large network ranges to allow for networks to be appropriately sized for the intended use case. This could be choosing the appropriate IP address for a data center, headquarters, or branch location. This section will dive into how this has been accomplished for the last 30 years of computer networking.
Since there a no classful associations in CIDR, this means the subnet mask is no longer determined by the value set within the IP address. As a network engineer, it’s a common activity to allocate IP networks based on the requirements for the task at hand. For example, maybe someone on another team needs to spin up a new set of servers in the data center and they need to know what IP network they should belong to. In addition, the more common and important capability is for a network engineer to calculate...