Objective 1.2
PCNEDesigning VPC networks
Objective 1.2 sits in Designing and planning a Google Cloud VPC network, which carries 21% of the Cloud Network Engineer exam. The questions below are original, written from the official objective title above, and each explanation cites the Google Cloud page it rests on.
Objective title verbatim from the official objectives. Google Cloud exam page ↗
A worked example
Shown solved, with the whole explanation open: this is what every question here carries.
An engineer tries to peer the default networks of two separate projects and the peering never becomes active. What property of those networks blocks it?
Correct.
Concept
Address planning decides whether two networks can ever be joined, since any method that merges routing tables needs every range on each side to be unique.
Why B
Every auto mode VPC network builds its subnets from the same predefined range of IP addresses, which is why two of them cannot be connected by VPC Network Peering or Cloud VPN.
Source
VPC networks, checked August 2026Because the subnets of every auto mode VPC network use the same predefined range of IP addresses, you can't connect auto mode VPC networks to one another by using VPC Network Peering or Cloud VPN.
Now you: objective 1.2 questions
No account needed. The explanation opens when you answer.
Sample question 1 of 3
An engineer switches an auto mode VPC network to custom mode to take control of its subnet ranges. What does that switch permanently rule out?
Sample question 2 of 3
A team sizes a subnet with a /29 primary range expecting eight instance addresses and cannot place them all. How many addresses in a primary IPv4 range are unavailable?
Sample question 3 of 3
A security team wants to predict what VPC firewall rule logging can and cannot show them. Where in the path are those rules applied?
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Read the sources
These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.