Cloud Engineer Cloud Engineer Networking & Connectivity 1 — Questions and Answers
Question 1: What is the default maximum transmission unit (MTU) for a Google Cloud VPC network?
- 1460 bytes (Correct answer)
- 1500 bytes
- 9000 bytes
- 1400 bytes
Correct 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.
Question 2: Which Google Cloud networking product connects your on-premises network to GCP using a dedicated physical connection?
- Cloud VPN
- Cloud Interconnect (Dedicated) (Correct answer)
- Direct Peering
- Cloud CDN
Correct 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.
Question 3: You need VM instances in two VPCs in different projects to communicate using private IPs. What is the recommended approach?
- Use public IPs for both VMs
- Create a VPN tunnel between the VPCs
- Set up VPC Network Peering (Correct answer)
- Use Cloud Interconnect
Correct 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.
Question 4: Which Cloud Load Balancer type operates at Layer 7 and supports content-based routing (e.g., URL maps)?
- Network Passthrough Load Balancer
- External HTTP(S) Load Balancer (Correct answer)
- TCP Proxy Load Balancer
- Internal TCP/UDP Load Balancer
Correct 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.
Question 5: What is the purpose of Cloud NAT in Google Cloud?
- Route traffic between VPC networks
- Allow VMs without external IPs to access the internet for outbound traffic (Correct answer)
- Provide inbound internet access to VMs
- Encrypt traffic between on-premises and GCP
Correct 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.
Question 6: Which Google Cloud DNS feature allows you to resolve GCP internal DNS names from an on-premises network connected via Cloud Interconnect?
- Public DNS zones
- Managed Private Zones with DNS Peering
- Cloud CDN
- DNS Forwarding with inbound server policies (Correct answer)
Correct 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.
Cloud Engineer Cloud Engineer Networking & Connectivity 1
What is the default maximum transmission unit (MTU) for a Google Cloud VPC network?