What Is IPv6?

IPv6 is an Internet Protocol (IP) address standard, created to replace and supplement IPv4, which is still in use by many Internet services today. All Internet-connected devices need a numerical IP address, including computers, mobile phones, home automation components, and Internet-of-things sensors. Due to the growth of linked devices, the original IP address system, IPv4, is running out of addresses.

What is IPv4?

IPv4 refers to the fourth major release of the Internet Protocol. We can link our gadgets to the web because of the underlying technologies. A data packet including the IP addresses of both devices must be transmitted over the network before data may be sent from one computer to another through the web.

Differences between IPv4 & Ipv6

IPv4:

-IPv4 addresses are 32 bits long.
-Configuration of the IP address does manually or automatically via DHCP.
-Connection integrity from one end to the other is not possible with IPv4.
-Sender and forwarding routers fragment data.
-The security feature is application-dependent.
-IPv4 addresses use decimal numbers for representation.

Ipv6

-IPv6 addresses are 128 bits long.
-It allows for automatic address setup as well as address renumbering.
-End-to-end IPv6 connection integrity is easy to achieve.
-Only the sender performs fragmentation in IPv6.
-The IPv6 protocol has an inherent security mechanism called IPSEC.
-IPv6 addresses are hexadecimal.

Advantages of IPv6

If you ask yourself a question, what is my IP address, go and learn about it. The IP layer, part of the TCP/IP protocol stack, is critical to the overall Internet architecture's functionality. However, ten years after IP became widely used in the 1980s, the scalability and capacity limits of IPv4 became apparent. For IPv4 to work, you'll need things like ICMP and ARP. The mid-1990s had hatched a new plan. Internet technology profiles dictate that access through IPv4 and IPv6 must coexist, which is why the switch to IPv6 is essential.

IPv6 has the following advantages over IPv4:

• Routing that is more efficient and doesn't fragment packets
• There is already a customizable quality of service (QoS) mechanism for distinguishing delay-sensitive packets.
• Increased address space by doing away with NAT.
• Integrated security at the network layer.
• Network management consists of simpler with stateless address auto-configuration.
• With reduced processing overhead and an improved header structure

What's the Deal?

• Eight 16-bit hexadecimal blocks separated by colons comprise the IPv6 address.
• Networks using IPv4 does split into "classes," with Class A networks being the largest, Class C networks being the second-largest, or "classes," with Class B networks being in between. Subnetting does use in IPv6 to change network sizes based on assigned address space.
• Multicast on IPv4 makes use of class-type address space. Multicast over IPv6 makes advantage of integrated address space.
• When using IPv4's "broadcast" addresses, all devices have to pause and examine packets. Multicast groups are a feature of IPv6, the next generation of Internet protocol.
• Unspecified addresses in IPv4 are 0.0.0.0 and the class-type address 0.0.0.0 for loopback, respectively.
• IPv4 utilizes globally unique public addresses for traffic, whereas "private" addresses are using only for internal usage. IPv6 makes use of both unicast and local addresses, the latter of which are globally unique.

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