Is this a video course?

No. This is an interactive, slide-based learning platform. Each lesson has rich text, animated diagrams, live code editors, and quizzes. You learn by reading, interacting, and doing, not by watching videos passively.

How long do I have access?

Forever. Both pricing tiers are one-time payments with lifetime access. This includes all current 766 lessons and any future content we add.

What level of experience do I need?

None. We start from absolute basics like 'What is latency?' and build up to distributed consensus protocols. The Foundation level assumes zero prior knowledge of system design.

How much does the system design course cost?

7.99 US dollars for lifetime access globally, or 499 Indian rupees for lifetime access in India. One-time payment, no subscription, no hidden fees. 11 lessons are free with no signup required.

What technologies are covered?

Everything from DNS and load balancers to Kubernetes, Kafka, distributed databases, consensus protocols, stream processing, security architecture, and observability. We cover principles and real-world implementations used at Netflix, Google, Amazon, Uber, Stripe, and more.

Is this useful for system design interview preparation?

Yes. The lessons are structured around the exact topics asked in system design interviews at FAANG and top-tier companies. Interactive diagrams help you practice whiteboard-style explanations. Covers everything from URL shortener design to distributed payment systems.

How is this different from ByteByteGo or Educative?

766 interactive lessons (4x more than most competitors), 16 different diagram types that build step by step, real production examples from Netflix, Google, Amazon, Uber, and Stripe, and lifetime access for a one-time payment of $7.99 instead of annual subscriptions costing 100 to 200 dollars per year.

A user in Istanbul has these measured latencies: Frankfurt 45ms, Mumbai 90ms, US-East 180ms. Geolocation says Istanbul is closest to Frankfurt. What does latency-based routing do?

Routes to Frankfurt because it has the lowest measured latency, Latency-based routing picks the endpoint with the lowest measured RTT. Frankfurt at 45ms. In this case, geolocation and latency-based routing agree. The difference shows up when network conditions make the geographically closest server not the fastest.

Your company must comply with GDPR. Which routing strategy should be primary?

Geolocation, guarantees EU data stays on EU infrastructure, GDPR requires data residency. European user data must be processed in approved regions. Latency-based routing might send an EU user to a US server if it's faster, violating compliance. Geolocation routing guarantees region affinity. You can use latency-based as a secondary tiebreaker within the compliant region.

Why can DNS caching reduce the effectiveness of latency-based routing?

Cached DNS responses keep routing to the same endpoint even after latency conditions change, Once a DNS resolver caches the result, it keeps returning the same endpoint IP until the cache TTL expires. If network conditions change in the meantime, users continue going to what might now be a slower endpoint. Low TTLs mitigate this but increase DNS query volume.

Latency-Based Routing

Name: System Design Masterclass
Availability: InStock

in Load Balancing Proxies

This lesson is part of the full System Design Masterclass. Unlock it along with 765 other lessons for a one-time payment.

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