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What is VPC Flow Logs?
VPC Flow Logs are the "network audit logs" of a VPC, showing who communicated with whom and whether the traffic was allowed or denied.
What is AWS PrivateLink?
AWS PrivateLink allows you to securely access services across VPCs, AWS accounts, or AWS services without using the public internet, NAT Gateway, VPN, or VPC Peering.
It provides private connectivity using private IP addresses through Interface VPC Endpoints.
What is a Transit Gateway?
AWS Transit Gateway (TGW) is a network transit hub that connects multiple VPCs, VPNs, and Direct Connect gateways using a hub-and-spoke architecture.
What is VPC sharing?
VPC Sharing is an AWS feature that allows multiple AWS accounts within the same AWS Organization to share subnets in a centrally managed VPC.
Instead of each account creating and managing its own VPC, a central networking team creates and manages the VPC, while other accounts deploy resources into the shared subnets.
What is a Bastion Host?
A Bastion Host is a hardened EC2 instance deployed in a public subnet that provides secure administrative access to instances in private subnets. Administrators first connect to the Bastion Host and then access private resources. It acts as a secure jump server and prevents exposing private instances directly to the internet. In modern AWS environments, Session Manager is often preferred over traditional bastion hosts for enhanced security and manageability.
