How can i access the Internet/Webpage?

• client → switch/hub → Internet
• If we want to acess some specific homepage, our Computer ask domain to DNS
• each homepage has a IP and Domain(URL)

example

Server Structure

• NAT → DDX → IPS → FW → APP/WEB/DB

JOBS and what language or stuff should we study

• front-end: HTML, CSS, JS
• back-end: Python, Java, JS, Linux
• AI: Python, statistic, Math, Cpp, Js
• Game: Csharp, Cpp (Using Unreal or Unity Engine)
• Network: CCNA, CCNP. CCIE
• Security: so many stuff to study :((

Emmet example

1. h$*6{Hello World} <= make h1~h6 text
2. table>(tr>td{hello}*3)*4 <= make table set
3. h1+h2 <= make h1 and h2 text