About AWS Connections & Virtual Interfaces

I'm a beginner at AWS, but I'm reading "How Cloud Infrastructure and API Works"

This is what the book describes about AWS Direct Connect.

AWS consists of virtual interface as the logical unit of connection, and connection is established based on connection ID as the API resource.The connection ID consists of attributes such as private AS number, VLAN number, CIDR for both parties, private gateway ID, and associated....

I have two questions about the above statement.

1. From AWS Document [1] and API CreateConnection Request Parameters, you need connections.Arguments such as , band, and connection name, not action ID.After the connection is established, the connection ID is returned as a result.Is the expression based on connection ID correct?

2. It says, "Connection IDs consist of attributes such as ... and are associated." Who is associated with whom?

Also, there seems to be a difference in the book with four APIs compared to AWS Document: CreatePrivateVirtualInterface, AllocatePrivateVirtualInterface, CreatePublicVirtualInterface, and AllocatePublicVirtualInterface.

In that book,

The connection ID is created by running the CreatePrivateVirtualInterface API, and the connection is completed by running the AllocatePrivateVirtualInterface API..

On the other hand, in AWS Document,
CCreates a private virtual interface. 」 and ProProvisions a private virtual interface to be owned by the specified AWS account. / respectively.

Similarly,

AWS has an API that creates a connection ID with a public AS number, runs on the CreatePublicVirtualInterface API, and completes the connection with the AllocatePrivateVirtualInterface using a public AS number, etc.