Quiz

2667 questions of the kind that actually get asked — in interviews, in architecture review boards, and by the person who has to run the thing at 3 AM. Every answer states the trade-off rather than the slogan, and says when the obvious choice is the wrong one.

All areas2667 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 AI-Era Architecture86 Software Architecture & Engineering84 Architecture Patterns84 Architecture Decision-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture90 Data Platform Architecture88 Streaming & Real-Time Data93 Data Governance & Semantics81 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk88

Difficulty Any beginner intermediate advanced

49 questions in Networking.

Quiz

0.5% of requests time out. It is not correlated with any instance, endpoint, customer or time of day. Where do you look?

A configuration push to thousands of edge locations must complete in under a minute, yet a bad config could take down the whole network. How do you reconcile speed with safety?

A crypto exchange sees intermittent elevated latency to a market-data provider. Servers are healthy, the provider reports no issues, and the problem appears in bursts. How would you diagnose it?

A developer platform receives reports that clones are slow "sometimes, from some places". Server metrics are healthy, error rates are normal, and the team cannot reproduce it. How do you investigate a problem that is invisible from the server side?

A user reports intermittent TLS errors from one region only. Walk through your diagnosis.

After moving a service behind a VPN to an on-premises system, small API calls succeed and large responses hang indefinitely. Walk through the diagnosis.

A mobility platform operates across several Southeast Asian markets where mobile networks vary enormously in quality, latency and reliability. Which network-layer decisions matter most, and which common assumption breaks first?

In the October 2021 Meta outage, engineers reportedly struggled to physically access equipment because the access-control systems were also down. What class of dependency is that, and how do you find yours?

You need to expose an internal service to a partner organisation. VPC peering or a private endpoint service? Justify.

A discussion platform puts a caching reverse proxy in front of its application. Anonymous traffic gets much faster; logged-in users see no improvement and occasionally see another user's content. What went wrong?

Fastly began a software deployment on 12 May 2021 that ran for nearly a month without incident. On 8 June a customer pushed a valid configuration change and 85% of the network started returning errors. What class of risk does that expose, and what does it mean for deployment safety gates?

A global edge network announces the same IP addresses from hundreds of locations. How does traffic reach the right one, what happens when a location fails, and what does this make harder?