Walked through VPC peering, routing tables, potential latency, and firewall rules.
Start by clarifying the scope: are the VMs in the same cloud provider or different? Then walk through the OSI model layers, focusing on network and transport layers, and discuss the role of routing, firewalls, and latency. Finally, highlight trade-offs like cost, security, and performance, and mention potential solutions like VPNs, peering, or direct connect.
Pro tip: Demonstrate awareness of real-world constraints by mentioning that cross-region traffic often incurs egress costs and that encryption (e.g., TLS) is essential for security. Also, note that while cloud providers offer private networking, it's not automatic and requires configuration.
Ask whether the VMs are in the same cloud provider (e.g., AWS, Azure) or different, and whether they are in public or private subnets. This determines the available networking options.
Describe how data travels from the source VM through its local network, to the internet or a private backbone, and then to the destination VM. Mention encapsulation, routing, and NAT if applicable.
Discuss potential barriers: firewalls, security groups, network ACLs, latency, bandwidth limits, and cost. Also mention DNS resolution and IP addressing.
Compare options like VPN, cloud provider peering (e.g., VPC peering, Transit Gateway), dedicated connections (e.g., Direct Connect, ExpressRoute), or public internet with encryption. Highlight trade-offs in cost, complexity, and performance.
Summarize by recommending encryption (TLS), monitoring, and using private networking when possible. Mention that for ADT, security and reliability are paramount.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.