What Is An Ipv6 Address And How Does It Differ From Ipv4?

In the realm of computer networks and internet connectivity, IP addresses play a crucial role in identifying devices and facilitating communication. The Internet Protocol (IP) has evolved over time, with IPv6 being the latest version. This article aims to explain what is an ipv6 address is and highlight the key differences between IPv6 and its predecessor, IPv4.

Understanding Ipv6 Addresses

A. Definition of an IPv6 Address:

An IPv6 address is a unique numerical identifier assigned to devices connected to an IPv6-enabled network. It consists of 128 bits, divided into eight groups of four hexadecimal digits, separated by colons.

B. Expanded Address Space:

IPv6 provides an enormously larger address space, allowing for approximately 3.4×10^38 unique addresses, compared to the roughly 4.3 billion addresses offered by IPv4.

Key Differences Between Ipv6 And Ipv4

A. Address Format:

IPv4 addresses consist of 32 bits and are represented in a decimal format with four octets separated by periods (e.g., On the other hand, IPv6 addresses use 128 bits and are expressed in a hexadecimal format with eight groups of four digits separated by colons.

B. Address Types:

IPv4 addresses are divided into several classes, including Class A, B, C, D, and E, each designed for specific purposes. IPv6, however, uses a more streamlined structure, with three main types of addresses: unicast, multicast, and anycast.

C. Address Configuration:

IPv4 addresses are typically assigned through manual configuration or using the Dynamic Host Configuration Protocol (DHCP). In contrast, IPv6 addresses can be obtained through various methods, such as stateless autoconfiguration, stateful configuration using DHCPv6, or manual assignment.

D. Address Allocation:

IPv4 address allocation faces limitations due to the depletion of available addresses. Regional Internet Registries (RIRs) manage the allocation process. In contrast, IPv6 addresses are allocated in a hierarchical manner, with the Internet Assigned Numbers Authority (IANA) overseeing the distribution to RIRs, who then allocate them to Internet Service Providers (ISPs) and organizations.

E. Address Translation:

IPv4 commonly employs Network Address Translation (NAT) to overcome the address shortage. In IPv6, NAT is not as widely used due to the abundance of addresses, and each device can have a unique public IP address.

Finding Your Ipv6 Address

  1. Windows Operating System:

To find your IPv6 address on a Windows computer, you can navigate to the network settings or use the Command Prompt and execute the “ipconfig” command.

B. macOS:

On macOS, go to the Apple menu, select “System Preferences,” and choose “Network.” Select your network connection, and your IPv6 address should be displayed.

C. Linux:

In Linux, open a terminal window and enter the “ifconfig” or “ip addr show” command to view your IPv6 address.

D. Mobile Devices:

For smartphones and tablets, you can find your IPv6 address in the network settings or by using network diagnostic apps available on the respective operating system’s app store.


IPv6 addresses are the future of internet connectivity, offering a significantly larger address space and improved features compared to IPv4. Understanding the differences between the two versions is essential for network administrators, IT professionals, and individuals seeking a deeper knowledge of the underlying infrastructure that powers the internet.

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