easy
Single Answer
0Why is IPv6 needed in the world today?
Answer Options
A
It does not require NAT to operate.
B
The IPv4 public address space is exhausted.
C
IPv4 is considered legacy, and IPv6 is the replacement.
D
IPv6 does not support subnetting.
Correct Answer: B
Explanation
IPv4 allows for 2^32 = 4.3 billion addresses. However, only 3.7 billion are usable because of reservations and classful addressing. The current IPv4 address space is exhausted, and IPv6 allows for 2^128 = 3.4 × 10^38 addresses. IPv6 still requires NAT for backward compatibility with IPv4. IPv6 does support subnetting with 16 bits dedicated for subnets.
ipv6
ipv4
address-space
nat