Question

How many bits are in IPv6 address ?

• A. 32 bits
• B. 128 bits
• C. 32 bytes
• D. 128 bytes

Hint:

Easy way to remember: IPv4 is 32 bits. IPv6 is the successor and is four times larger: \(4 \times 32 = 128\) bits.

Answer 1

The Correct Option is B

Step 1: Differentiate between IPv4 and IPv6. IPv4 is the older addressing system and uses 32-bit addresses. IPv6 was developed to overcome the address exhaustion of IPv4.
Step 2: State the size of an IPv6 address. An IPv6 address is 128 bits long, providing a vastly larger address space than IPv4.
Step 3: Analyze the byte options. Since 1 byte = 8 bits:

32 bytes = 256 bits.
128 bytes = 1024 bits.
These are incorrect. The correct answer is 128 bits.