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Understanding Web Architecture

HTTPs, Certificate Authority, Self-signed Certificate​

What is a Web Server?​

Resources:​

Serverless​

Microservices​

Monolith​

  • Monolith - Everything is togather; Individual components are hard to upgrade or scale
  • Codebase lives on the same server & usually in same repository.

Non-Monolith (MicroService)​

  • Isolated components that are divided by responsibility
  • Independent scaling of the components
  • Standardized interface (API) so any service can use it
  • Can be independently developed by different teams

Resources:​

Communication & Firewalls​

Communication​

  • Services usually have one, or a few ports open
  • Usually they restrict who can talk to them
  • Encryption is not necessary INSIDE the cluster

Firewall​

  • Firewall filters for:
    • Request origin (domain or IP)
    • Port used
    • content (exploits, sql injection)
    • Frequency (DDoS / throttling)

Resources:​

Caching​

Types of caching:​

Client Side​

  • Browser cache
  • Service worker/ Single Page Apps (SPAs)

Network​

  • DNS cache
  • Content Delivery Network
  • HTTP cache (Varnish)

Server Cache​

  • Object cache
  • Database cache

Resources:​