# DNS, SSH, HTTP

# DNS

![Image](slides/dnsssh/dns.jpeg)

# DNS

- UDP/TCP
- centralizovan protokol (hijerarhijska struktura)
- klijent-server struktura
- klijent, resolver, nameserver
- tipovi DNS podataka

# SSH

- TCP
- ssh user@1.2.3.4
- javni i privatni ssh kljucevi
- ssh jump (ssh -J user@proxy user@1.2.3.4)

# HTTP

- TCP
- klijent-server struktura
- nginx, apache, httpd
- nginx reverse proxy