How browser works?

What does Internet means?

Can you tell smth about protocol?

Computer network

computing device

Types of network

  • LAN
  • WAN
  • DCN
  • ...

Local Area Network

Wide Area Network

Data Center Network

Network Interface

Copper cable

Fiber-optic cable

Wireless

Network layer

IP adress

IPv4

74.125.20.113

1 number -> 2^{8}
whole ip -> 2^{32} = 4,294,967,296

IPv6

2001:0db8:0000:0042:0000:8a2e:0370:7334

whole ip -> 2^{128} = 340,282,366,920,938 * 10^8

DNS

Domain name system

Hierarchy of domain

Transport layer

Router, packages

How to control?

Application layer

Transport Layer Security

HTTP & HTML

URL

uniform resource location

Browser search IP

Cookies

 

Why do we need them?

  • Authentication (session management)
  • User tracking
  • Personalization (theme, language selection, etc.)
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