Final answer:
A Private Hosted Zone in cloud computing is designed for routing traffic within VPCs and is not accessible over the public internet, providing secure domain name resolution only within the specified VPCs.
Step-by-step explanation:
The type of hosted zone that is available only within 1 or more Virtual Private Clouds (VPCs) is known as a Private Hosted Zone. This type of hosted zone is used to route traffic within one or more VPCs and is not accessible from the public internet. A Private Hosted Zone is particularly useful when you want to use the same domain names in a VPC as you use in your on-premises network, but do not want these domain names to be resolvable over the public internet.
For example, if you have a domain like internal.example.com, and you want instances within your VPC to be able to resolve this domain but prevent access from outside the VPC, you would use a Private Hosted Zone. It provides enhanced security by ensuring that DNS queries for your domain names can only originate from within your configured VPCs.