# Document history
Document historyMajor update

Updates throughout whitepaper for changes to CloudWAN, Amazon VPC Lattice, ENA Express, hybrid connectivity, Direct Connect Sitelink, Deep Packet Inspection, and AWS Verified Access.Minor update

Updated diagrams to be more consistent, updated DX connectivity options to include private IP VPN, and numerous minor changes throughout.Minor update

Updated AWS Control Tower information, reflected new throughput limits for various services, updated NAT gateway diagram, updated security section for centralize egress.Minor update

Added section: Cross Region endpoint access.Major update

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. Minor update

Updated *Transit Gateway vs VPC peering* sectionWhitepaper updated

Corrected text to match the options illustrated in Figure 7Initial publication

Whitepaper published.

To be notified about updates to this whitepaper, subscribe to the RSS feed.

| 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 |