What is IPv6? · Ultra Transcenders glossary

Addressing based on 128 bits, available in Standard public IPs and dual-stack VNets. Public IPs for Azure Firewall and Bastion have to be IPv4.

Also called Internet Protocol version 6.

In the Ultra Transcenders books

Each book explains IPv6 in context, with comparison tables and the common traps.

BITS
A Windows service for downloads. Delivery Optimization hands downloads to it in Bypass mode (100), a mode now deprecated for Windows 11 that can cause failures with error 0x80d03002.
Standard deployment type
A Foundry deployment type billed per token that keeps processing of prompts and responses inside the Azure geography of the resource, meeting data residency needs at lower volumes.
Dual-stack
A virtual network or subnet that has an IPv6 range alongside its IPv4 one. IPv6 subnets are always /64, drawn from the VNet's IPv6 space and added to a subnet that already exists.
Azure Firewall
Stateful network firewall run by Azure as a managed service; it can be placed in Virtual WAN hubs and administered through Firewall Manager.
IPv4
The 32-bit version of IP addressing. It remains the address format you will see most often in log data and threat indicators.

AAAA
Maps a hostname to an IPv6 address in DNS; IPv4 addresses use A records.
AAAA record
Type of DNS entry that resolves a host to its IPv6 address.
Add-AzNetworkInterfaceIpConfig
Cmdlet in Az.Network for adding another IP configuration to a NIC that already exists. Passing -PrivateIpAddressVersion IPv6 lets a VM gain IPv6 without needing a second NIC.
DHCPv6
The IPv6 version of DHCP, which either supplies options alone (stateless) or leases addresses too (stateful). DHCP failover cannot protect DHCPv6 scopes.
MultiValue
Traffic Manager routing method that answers each query with multiple healthy endpoints, at most 10. It accepts only External endpoints specified as IPv4 or IPv6 addresses.
Named location
A location for Conditional Access, made either from public IPv4 or IPv6 ranges (optionally marked as trusted) or from countries worked out by IP address or Authenticator GPS. A tenant can have up to 195 IP-based ones, each holding up to 2,000 ranges.
Public IP address
Resource in Azure for an IPv4 or IPv6 address routable on the internet, attached to a NIC, firewall, gateway, load balancer or Bastion host. Allocation, zone support and default security depend on its SKU.
Standard SKU public IP
Public IP that is always static and may be zone-redundant, zonal or IPv6. It blocks inbound traffic until an NSG permits it, and Bastion, Azure Firewall, VPN gateways and Standard Load Balancer all require it.