Subnet Masks
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What is Subnet Masks?
A subnet mask is a 32-bit number used alongside an IP address to determine which portion of the address identifies the network and which portion identifies the individual host. It works by applying a bitwise AND operation with the IP address to extract the network address. For example, a subnet mask of 255.255.255.0 means the first three octets represent the network and the last octet identifies hosts within that network.
Free resources to learn Subnet Masks
- ArticleWhat Is a Subnet Mask?
- VideoSubnet Mask - Explained
More in stage 10: Subnetting
Subnet Masks: common questions
Can I learn Subnet Masks in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Subnet Masks in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Subnet Masks tutorial for beginners?
It is lesson 89 of 195 in the free Network Engineer roadmap, in stage 10, Subnetting. If you are new to Network Engineer, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.