DNS record · Foundational

A / AAAA Record

IPv4 / IPv6 address records

What does A / AAAA Record mean?

DNS records that map a name to an IPv4 address with A or an IPv6 address with AAAA.

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IP AddressA numeric identifier used to route network traffic to an interface using IP.
IPv4 / IPv6The two widely used IP versions; IPv6 provides a much larger address space and other protocol changes.
TCP / UDPTwo transport protocols: TCP provides an ordered reliable byte stream, while UDP sends independent datagrams with less overhead.
PortA transport-layer number that lets one host direct TCP or UDP traffic to the correct application process.
SubnetA range of addresses grouped by a shared network prefix for routing and administration.
CIDRNotation and routing practice that describes an IP prefix with an address and prefix length, such as /24.
VPC / VNetA logically isolated cloud network where addresses, routes, subnets and security controls are configured.
VPNAn encrypted or otherwise protected connection that extends network access across an untrusted network.