What is Kestrel?
PICTURE THIS: A REST CALL
Simple meaning
Kestrel is the cross-platform web server built into ASP.NET Core.
WHY — ASP.NET instead of guessing?
Why interviewers care about ASP.NET:
who only read docs from people who shipped.
and tied to .NET work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Kestrel is the cross-platform
web server built into ASP.NET Core.
- 2In production it often
sits behind IIS, Nginx, or a load balancer.
- 3I still configure limits
and HTTPS carefully.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Kestrel is the cross-platform web server built into ASP.NET Core. In production it often sits behind IIS, Nginx, or a load balancer.