What is the difference between IPv6 and IPv4 domain name resolution?
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In recent years, as Internet IP addresses are increasingly used and are seriously insufficient, the Internet technology department has developed a new IP address, upgrading from IPV4 to IPV6. So what does this IP mean? What are the main differences? Let's take a look.
1. Address length:
IPv4 uses 32-bit addresses, while IPv6 uses 128-bit addresses. The address space of IPv6 is much larger than that of IPv4, which can provide more available addresses and solve the problem of IPv4 address exhaustion.
2. Address representation:
IPv4 addresses are represented in dotted decimal notation, such as 192.168.0.1. IPv6 addresses are represented in hexadecimal notation separated by colons, such as 2001:0db8:85a3:0000:0000:8a2e:0370:7334.
3. Protocol support:
IPv4 is the earliest widely used protocol on the Internet, and IPv6 is the next generation protocol of IPv4. IPv6 is designed to gradually replace IPv4 to solve the shortage of IPv4 addresses and support more devices and services.
4. Network scale:
Due to the huge expansion of IPv6 address space, IPv6 can support larger-scale network deployment. This is particularly important for the future development of the Internet, which can meet the needs of connecting a large number of devices, such as the Internet of Things and large-scale deployed sensor networks.
5. Protocol characteristics:
IPv6 introduces some new protocol features, such as stateless address autoconfiguration (SLAAC), neighbor discovery protocol (NDP), etc., to provide better network performance, security and reliability.
In domain name resolution, the difference between IPv6 and IPv4 is mainly reflected in the IP address returned by the resolution result. When the domain name is resolved to an IPv6 address, the network environment using IPv6 can directly access IPv6 services; when the domain name is resolved to an IPv4 address, the network environment using IPv4 can directly access IPv4 services. The domain name resolution system returns the corresponding IP address according to the user's network environment to ensure that the user can correctly access the required service.
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