# Glossary for Cluster Connections

<a id="term-ARN"></a>

ARN
: Amazon Resource Name, literal object identifier, for more details: [Amazon Resource Names](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference-arns.html).

<a id="term-RAM"></a>

RAM
: Regional AWS Cloud resource that allows accounts share resources in controlled and secure manner, for more details: [Resource Access Manager](https://aws.amazon.com/ram/).

<a id="term-RAM-Invitation"></a>

RAM Invitation
: Invitation sent by [RAM](#term-RAM) towards account it shares resources with [AWS Resource Access Manager Invitation](https://docs.aws.amazon.com/lake-formation/latest/dg/accepting-ram-invite.html).

<a id="term-TGW"></a>

TGW
: Regional AWS Cloud resource that connects network appliances together, for more details:  [AWS Transit Gateway](https://docs.aws.amazon.com/vpc/latest/tgw/tgw-transit-gateways.html).

<a id="term-TGW-VPC-Attachment"></a>

TGW VPC Attachment
: Resource on ScyllaDB Cloud that connects ScyllaDB cluster datacenter to a [TGW](#term-TGW), for more details:  [AWS TGW VPC Attachment](https://docs.aws.amazon.com/vpc/latest/tgw/tgw-vpc-attachments.html).

<a id="term-ScyllaDB-Cloud-AWS-Account"></a>

ScyllaDB Cloud AWS Account
: AWS account where ScyllaDB Cloud is running your clusters.

<a id="term-Cluster-AWS-Account"></a>

Cluster AWS Account
: AWS account where cluster is running, could be [ScyllaDB Cloud AWS Account](#term-ScyllaDB-Cloud-AWS-Account) ( **696340704738** ), or could be customer AWS account.

<a id="term-Cluster-Datacenter-CIDR"></a>

Cluster Datacenter CIDR
: IPv4 address space designated for cluster use in given datacenter. When you want to connect to the cluster you need to route this CIDR to a connection if your choice.
  <br/>
  You can view the Cluster Datacenter CIDR in your cluster details, for example:
  <br/>
  ![image](cluster-connections/images/aws-tgw-vpc-attachment/get-cluster-dc-cidr-1.png)