1.1 Internet
- IP
:a simple protocol for attempting to send data between two computers
각각의 device는 32bit의 IP 주소를 8bit-number 4개로 가지고 있다.
자신의 local IP 주소 확인하는법
: CMD 창을 열고 "ipconfig" (쌍따옴표 없이)를 치면 된다.
- TCP
: adds multiplexing, guaranteed message delivery on top of IP
*port : a number given to each program or service
ex) port 80 : web browser
port 22 : secure shell etc
1.2 The World Wide web
- Web Server : software that listens for web page requests
ex) Apache
- Web Browser : fetches/displays documents from web servers
ex) Mozilla Firefox, Safari, Internet Explorer
- Domain Name System (DNS)
:a set of servers that map written names to IP addresses
ex) cse.hanyang.ac.kr -> 166.104.239.93
- Uniform Resource Locator (URL)
: an identifier for the location of a document on a web site
- Hypertext Transport Protocol (HTTP)
: the set of commands understood by a web server and set from a browser
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