Objective 1.3
PCNEDesigning a resilient and performant hybrid and multi-cloud network
Objective 1.3 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.
A team wants to raise the MTU of a VPC network above the default for a bulk transfer workload. Which value falls inside the permitted range?
Correct.
Concept
A configurable limit carries an enforced band, and a figure that is conventional elsewhere in the industry is not automatically accepted by a platform that publishes its own bounds.
Why A
A VPC network uses a default MTU of 1,460 bytes and can be set to any value between 1,300 bytes and 8,896 bytes inclusive.
Source
Maximum transmission unit, checked August 2026Virtual Private Cloud (VPC) networks use a default MTU of 1,460 bytes. You can set a VPC network's MTU to any value between 1,300 bytes and 8,896 bytes (inclusive). Common custom MTU sizes are 1,500 bytes (standard Ethernet) or 8,896 bytes (the maximum possible).
Now you: objective 1.3 questions
No account needed. The explanation opens when you answer.
Sample question 1 of 3
An engineer sends a 4,000-byte UDP datagram with the DF bit cleared from an instance toward an address outside its VPC network. What becomes of that packet?
Sample question 2 of 3
A team sets an 8,896-byte network MTU and expects oversized frames on every path out of the VPC network. Which connection type does not support jumbo frames?
Sample question 3 of 3
An administrator raises a VPC network MTU to 8,896 bytes. Linux instances on public images adopt it, but Windows instances on public images stay at 1,460. What is needed?
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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.