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

86 questions in Networking.

Quiz

A partner reports your API fails from their servers with a certificate error. It works in every browser you try and from your laptop. Diagnose and prevent.

A production outage was caused by an expired internal certificate. Nobody was tracking it. Design the fix.

An internal service-to-service certificate expires at 02:00 on a Sunday. What is the impact and what should have prevented it?

Ballot SC-081v3 cut the maximum public TLS certificate lifetime to 200 days from 15 March 2026, with 100 days from March 2027 and 47 days from March 2029. A team currently renews its 400 public certificates by quarterly ticket. What does the shorter ceiling buy, and what is the bill?

Where should TLS terminate in a platform serving customer traffic, and what changes when a compliance requirement demands encryption in transit inside the network?

A large enterprise is designing its cloud network for dozens of business units with connectivity back to on-premises data centres. Which decisions are irreversible, and what is the most common expensive mistake?

Two companies merge. Both use 10.0.0.0/16 for production and the networks must be connected. What are your options?

You are designing the network for a platform expected to run for a decade, spanning multiple regions, with acquisitions likely. What do you decide on day one and why?

2.4 million live WebSocket sessions sit on a gateway fleet being retired this quarter, with a replacement fleet ready in the same region. Sequence the cutover so no session is forced to reconnect more than once and the subscription path is never asked to absorb a storm.

A chat platform's websocket edge gateways lose a region to a cloud networking failure. How should reconnect storms, session resumption, message-gap recovery and gateway draining be designed so a 30-second outage does not become a 3-hour one?

A collaborative editor needs to push document changes to connected clients with minimal latency. Which transport should it use, and what does the choice imply for infrastructure?

A dashboard product uses WebSockets for live updates. It works at 5,000 concurrent users and falls apart at 50,000. Diagnose the architectural issues.