WWW & WWW

1990: Tim Berners-Lee WWW HTTP1990: browser1991: o web server Stanford1993: NCSA Mosaic1994: Netscape1995: HTML 2.0, MS Internet Explorer1997: HTML 3.21998: XML1999: HTML 4.0,

TCP/IP: Echo, Ping, Traceroute, Whois, FTP, E-mail (SMTP, POP3, IMAP), TELNET, HTTP

TCP (Transfer Control Protocol)DARPA 1973 Web Full Duplex

IP (Internet Protocol) hosts

IP 32-bit. InterNIC

: x.x.x.x(x: 0-255) bits 5 Class A-E

IP

IPv6 IP : IP version 6 (IPv6) 128 bit ( 32) x : x : x : x : x : x : x : x (x 16bit, )FEDC:BA98:4798:8798:FEDC:BA98:78D9:3425 Multicast ( / ) : http://www.ipv6.org

Domain Name Service (DNS)Domain Name Service IP .. 150.140.141.181 diogenis.ceid.upatras.gr, InterNicCENTRGR - HOSTMASTER

InternetClient Server ( - ) (server) (client) server client

HTTP (HyperText Transfer Protocol) client serverUniform Resource Identifier , ,

HTTP URL URI ( html .. ) http.. http://www.ceid.upatras.gr/proptyxiaka/mathimata.htm web server

HTTP HTTP client server GET ( )GET http://www.w3.org/pub/www/theproject.html HTTP/1.1

HEAD POSTOPTIONS PUT DELETE TRACE CONNECT

HTTP (HyperText Transfer Protocol)www.panteion.grGET www.panteion.gr HTTP/1.1HTTP/1.1 200 OK

HTTP

FTP: 2 SMTP: emailICMP: ( ping/traceroute )

(Hypertext) HTML, (, , ) (tags), , *.html, *.html

HTML

. ? ; ; (Search Engines)Google (www.google.com), Yahoo! (www.yahoo.com), Altavista (www.altavista.com)A9 (http://a9.com)

1 Manchester United

Manchester United Manchester City"Manchester united" or "Manchester city

Brown Sugar lyrics Rolling StonesBrown Sugar lyrics stones (Google)

Manchester United Manchester City"Manchester united" or "Manchester city

Brown Sugar lyrics Rolling StonesBrown Sugar lyrics stones (Google)

Manchester United Manchester City"Manchester united" or "Manchester city

Brown Sugar lyrics Rolling StonesBrown Sugar lyrics stones (Google)Advanced Search Altavista

Google?

panagis@ceid.upatras.gr