INTERNET USE
1. Network and internet
1.3. Protocols and addresses, Internet services
Protocols and addresses
TCP/IP (Transmission Control Protocol/Internet Protocol). Different protocols control different Internet processes.
Protocols are agreements that allow different computers to exchange information, e.g. FTP, HTTP, SMTP, POP, DNS protocols.
Each computer that connects to a network or the Internet has its own unique IP address, which is represented by a symbolic name, e.g. 193.219.33.31 and 193.219.66.161 are the IP addresses of the computers, and the corresponding symbolic names are www.testuok.lt and www.ecdl.lt
Symbolic names are translated into numeric IP addresses by Domain Name Servers (DNS)
The World Wide Web relies mainly on hypertext - the HTTP protocol and HTML.
Network card settings when connecting to the Internet: 1 - network card; 2 - TCP/IP protocol; 3 - host IP address
Internet services
Web servers provide a variety of services, the most popular of which are:
- Web (WWW or Web)
- e-mail and conferencing (UseNet)
- Internet chat (IRC, Skype)
- file transfer (FTP) and file searching (Gopher)
- connecting to a remote computer (Telnet)
To connect to these servers, the appropriate information transfer protocols are used: http, ftp, gopher, telnet, etc.
