Lesson 5: Subnetting and VLSM

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7 Terms

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Subnetting

Dividing a large network into smaller subnetworks for better performance, security, and IP management.

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Why Subnetting is Important

  • Improves network efficiency (reduces broadcast traffic).

  • Enhances security (limits issue propagation).

  • Prevents IP address wastage.

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IP Address

32-bit number (e.g., 192.168.1.1).

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Subnet Mask

Identifies network/host portions (e.g., 255.255.255.0).

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CIDR Notation

IP address with subnet mask (e.g., 192.168.1.0/24)

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How Subnetting Works

Uses binary representation to calculate subnets and hosts.

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VLSM (Variable Length Subnet Mask)

Allows subnets of different sizes for efficient IP usage.