Cloud Engineer Networking & Connectivity Flashcards

What is the default maximum transmission unit (MTU) for a Google Cloud VPC network?

Answer: 1460 bytes

Google Cloud VPC uses an MTU of 1460 bytes by default (not 1500) because of the 40-byte overhead used by GCP's encapsulation.

Which Google Cloud networking product connects your on-premises network to GCP using a dedicated physical connection?

Answer: Cloud Interconnect (Dedicated)

Dedicated Interconnect provides a direct physical connection between your on-premises network and Google's network, offering high bandwidth and low latency.

You need VM instances in two VPCs in different projects to communicate using private IPs. What is the recommended approach?

Answer: Set up VPC Network Peering

VPC Network Peering allows private IP communication between VMs in different VPCs (even in different projects or organizations) without routing traffic over the internet.

Which Cloud Load Balancer type operates at Layer 7 and supports content-based routing (e.g., URL maps)?

Answer: External HTTP(S) Load Balancer

The External HTTP(S) Load Balancer (Application Load Balancer) operates at Layer 7 and supports URL-based routing, host-based routing, and other HTTP-aware features.

What is the purpose of Cloud NAT in Google Cloud?

Answer: Allow VMs without external IPs to access the internet for outbound traffic

Cloud NAT enables VMs without external IP addresses to initiate outbound connections to the internet, keeping them private while still allowing updates and API calls.

Which Google Cloud DNS feature allows you to resolve GCP internal DNS names from an on-premises network connected via Cloud Interconnect?

Answer: DNS Forwarding with inbound server policies

Cloud DNS inbound server policies create forwarding addresses in a VPC so on-premises resolvers can forward GCP internal DNS queries to Cloud DNS over Interconnect or VPN.