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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: