# Document history
<a name="document-revisions"></a>

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| Change | Description | Date | 
| --- |--- |--- |
| [Major update](#document-revisions) | Updates throughout whitepaper for changes to CloudWAN, Amazon VPC Lattice, ENA Express, hybrid connectivity, Direct Connect Sitelink, Deep Packet Inspection, and AWS Verified Access. | April 17, 2024 | 
| [Minor update](#document-revisions) | Updated diagrams to be more consistent, updated DX connectivity options to include private IP VPN, and numerous minor changes throughout. | July 6, 2023 | 
| [Minor update](#document-revisions) | Updated AWS Control Tower information, reflected new throughput limits for various services, updated NAT gateway diagram, updated security section for centralize egress. | April 4, 2023 | 
| [Minor update](#document-revisions) | Added section: Cross Region endpoint access. | July 19, 2022 | 
| [Major update](#document-revisions) | Updated Transit Gateway section with Transit Gateway Connect, updated Transit VPC section; updated Direct Connect section with MACsec and resiliency recommendations; updated AWS PrivateLink section. Added VPC peering vs. Transit VPC vs. Transit Gateway comparison table; added centralized inbound inspection section; updated centralized network security for VPC-to-VPC and VPC-on-premises to VPC and centralized egress to internet with AWS Network Firewall and Gateway Load Balancer design patterns; added private NAT gateway and Amazon Route 53 DNS Firewall sections.  | February 22, 2022 | 
| [Minor update](#document-revisions) | Updated *Transit Gateway vs VPC peering* section | April 2, 2021 | 
| [Whitepaper updated](#document-revisions) | Corrected text to match the options illustrated in Figure 7 | June 10, 2020 | 
| [Initial publication](#document-revisions) | Whitepaper published. | November 15, 2019 |