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What's the difference between IPv4 and IPv6?

The Google Public DNS IP addresses
Google Developer's page explains IP4 vs IPv6 addresses.
(IPv4) addresses are as follows:

8.8.8.8
8.8.4.4
The Google Public DNS IPv6 addresses are as follows:

2001:4860:4860::8888
2001:4860:4860::8844
Some devices require explicit values for all eight fields of IPv6 addresses and cannot accept the abbreviated :: IPv6 address syntax. For such devices enter:

2001:4860:4860:0:0:0:0:8888
2001:4860:4860:0:0:0:0:8844
Expand the 0 entries to 0000 if four hexadecimal digits are required.

You can use either address as your primary or secondary DNS server.

Article

TOWARDS SMART NETWORKING WITH SDN ENABLED IPV6 NETWORK https://arxiv.org/pdf/2203.01528.pdf (March 2022)
Souce: arxiv.org pre-print draft database - some changes may be made in final published document.

This paper presents the features and benefits of legacy IPv4 network migration towards major two latest networking paradigms viz. Internet protocol version 6 (IPv6) and the software-defined networking (SDN).

These latest networking paradigms are the enabler of future generation networking so that the standards and requirements of fifth generation (5G) wireless networking can be achieved.

Features and migration approaches of IPv6 and SDN will be separately discussed, then a joint migration approach of SDN and IPv6 network termed as SoDIP6 network migration will be presented, and the integration of SoDIP6 network as a backbone of 5G network will be introduced.

E-Books - Detailed information

IPv6 and IoT Policy, Guidance and Best Practices (hpc.mil) "A collection of policy, guidance and best practices documents for Internet Protocol version 6 (IPv6) and Internet of Things (IoT) (which have also been called Smart Objects, Things, or Devices) in 4 parts."
2022 Assessment of the National Institute of Standards and Technology's Communications Technology Laboratory (Free download or Read Online Free) Report "assesses the management of Standards and Technology Communications Technology Laboratory (CTL), focusing on the work, facilities, equipment, personnel, portfolios of scientific expertise, and effective dissemination of the results."

.gov websites - Biases include agency security and justification for taxpayer expense.

CISA: INTERNET PROTOCOL VERSION 6 CONSIDERATIONS FOR TRUSTED INTERNET CONNECTIONS 3.0 January 2022 (cisa.gov)
Historical and purpose highlights.
"IPv6 enables the automatic configuration of IP addresses. Unlike IPv4 networks, which require administrators to assign an IP address to hosts or a Dynamic Host Configuration Protocol (DHCP) server to assign those addresses, IPv6 networks are plug-and-play in nature and support automatic address configuration."
HHS: Policy For The Transition To Internet Protocol Version 6 (Ipv6) (hhs.gov)
National Security Agency | Cybersecurity Information Sheet IPv6 Security Guidance (media.defense.gov)

U/OO/105622-23 | PP-22-1805 | JAN 2023 Ver. 1.0 6 NSA | IPv6 Security Guidance

* Dual stack environment	Exists when devices run both IPv4 and IPv6 protocols simultaneously.
* Split DNS	Uses two separate DNS servers created for the same domain, one for the external network and one for he internal network. NSA recommends implementing split DNS, for both IPv4 and IPv6 networks.
* Tunneling	Is a transition technique that allows one protocol to be transported, or tunneled, within another protocol.
ACLs	Access control lists
DNS	Domain Name System
DHCPv6	Dynamic Host Configuration Protocol version 6
ICMPv6	Internet Control Message Protocol for IPv6
MAC	Media access control
RA	Router Advertisement
SLAAC	Stateless address auto-configuration
Split DNS	Use split domain name system

INFORMATION TECHNOLOGY RESOURCES: IPV4 move to IPV6

What's the difference between IPv4 and IPv6?

Background

Cool Tools

Resource Access through FVTC

Article

E-Books - Detailed information

.gov websites - Biases include agency security and justification for taxpayer expense.