[Solved] Why does CIDR notation improve IP address allocation compared to traditional classful addressing? — Ans: It allows variable-length subnet masks for efficient IP use | Computer Networks

Computer Networks - IP Addressing

Why does CIDR notation improve IP address allocation compared to traditional classful addressing?

AIt assigns IP addresses based on geographic location

BIt restricts networks to fixed sizes for simplicity

CIt eliminates the need for subnet masks entirely

DIt allows variable-length subnet masks for efficient IP use

Step-by-Step Solution

Solution:

Step 1: Understand classful addressing limits
Classful addressing uses fixed block sizes, often wasting IPs.
Step 2: Explain CIDR advantage
CIDR uses variable-length subnet masks, allowing networks to be sized to need, saving IPs.
Final Answer:
It allows variable-length subnet masks for efficient IP use -> Option D
Quick Check:
CIDR = flexible subnetting for IP efficiency [OK]

Quick Trick: CIDR enables flexible subnet sizes, reducing waste [OK]

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Why does CIDR notation improve IP address allocation compared to traditional classful addressing?