PCNE Implementing VPC Instances Practice Question
What is the default MTU for Compute Engine virtual machines?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
1460
Compute Engine instances use an MTU of 1460 bytes by default (the Ethernet maximum 1500 minus the IP/GRE overhead for tunneling). Some instance types support jumbo frames (MTU 8896).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1400
Why it's wrong here
1400 is incorrect; it is not the default MTU for Compute Engine instances.
- ✗
1500
Why it's wrong here
1500 is incorrect; Compute Engine uses a lower MTU due to encapsulation overhead.
- ✗
8896
Why it's wrong here
8896 is incorrect; it is the jumbo frame size, available on some instance types but not the default.
- ✓
1460
Why this is correct
1460 is correct; Compute Engine VMs use an MTU of 1460 bytes by default.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNE exam.