How many bits are used in IPv4 address ?

Correct option is A

An IPv4 address consists of 32 bits, divided into four octets. Each octet represents 8 bits, making it possible to represent up to 4.3 billion unique addresses. These addresses are commonly written in the dotted-decimal format, such as 192.168.1.1.

Important Key Points:

1. IPv4 uses 32-bit addressing, while IPv6 uses 128-bit addressing.
2. IPv4 addresses are divided into five classes (A, B, C, D, and E), each designed for specific use cases.
3. Due to the exhaustion of IPv4 addresses, IPv6 was introduced, which supports a significantly larger address space.

Knowledge Booster:

• IPv6 Addressing: IPv6 uses 128 bits, providing approximately 340 undecillion addresses.
• IP Address Components:

• Network Part: Identifies the network.
• Host Part: Identifies the specific device within the network.

• IP Address Format:

• IPv4: Written as four numbers separated by dots (e.g., 192.168.0.1).
• IPv6: Written as eight groups of hexadecimal numbers separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).

• Subnet Mask: Used to divide the IP address into network and host portions.