Why do we use Subnet mask? What are its uses? - Networking

Why do we use Subnet mask? What are its uses?

- Subnet mask is utilized for isolating the network id and host ids.
- This is to reduce the broadcast domain or to reduce heavy network traffic.
- A subnet mask helps in separating an IP address into network and host address.
- It is a 32-bit number which masks an IP address and divides it into network and host address.
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