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.)