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.

What is the head-of-line blocking problem in HTTP/2 over TCP, and how does QUIC solve it?

When one stream's lost packet blocks all other streams on the same TCP connection; QUIC provides per-stream loss recovery so only the affected stream stalls, HTTP/2 multiplexes multiple streams over one TCP connection. TCP sees all streams as one byte stream and guarantees in-order delivery. If one packet is lost, TCP holds up ALL data until it's retransmitted, even data for unaffected streams. QUIC gives each stream independent flow control and loss recovery, so a loss in stream A doesn't affect streams B, C, or D.

Why does QUIC run on UDP instead of creating a new transport protocol?

Middleboxes (firewalls, NATs) worldwide already pass UDP through unchanged, while deploying a new transport protocol would require years of updates to every device on the internet, Creating a new IP protocol number would require every firewall, NAT, router, and middlebox worldwide to be updated, a process that takes a decade or more. UDP is already universally supported. By building QUIC on top of UDP, Google could deploy it immediately in Chrome and their servers without waiting for the internet's infrastructure to change.

What is QUIC's connection migration feature, and why does it matter for mobile users?

It lets a connection survive network changes (WiFi to cellular) because it uses a connection ID instead of being tied to an IP:port pair, TCP connections are identified by the 4-tuple (source IP, source port, dest IP, dest port). When a phone switches from WiFi to cellular, the source IP changes, and every TCP connection dies. QUIC identifies connections by a connection ID that's independent of the network path, so the connection continues smoothly across network changes.

What happens during a QUIC 0-RTT connection?

A returning client sends application data with its very first packet, using cached cryptographic parameters from a previous session, When a client has previously connected to a server, it caches the server's TLS parameters. On the next connection, the client includes encrypted application data in the very first packet it sends. The server uses the cached parameters to decrypt this early data immediately. Zero round trips of latency before useful data flows.

QUIC

Name: System Design Masterclass
Availability: InStock

in Cloud Infrastructure

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