E

: - .http://users.sch.gr/dmgtz dgkotzos@primedu.uoa.gr

:

(LAN)

(WAN). To WAN.

Internet - .

: pstn 56kbps, isdn 128 kbps, adsl(2+) 24 mbps (1mbps=1024kbps) (wifi, wimax )A gprs 56kbps /3g/HSPA 7,2 mbps) (FTTN, FTTB, FTTH 100mbps )

Internet

/

Modem / router/ (wireless network card/usb adapter)

Internet (nternet Service Provider) (.. otenet, forthnet)

Dial Up ( 128 kbps) + PSTN/ISDNE dialer

ModemInternetServiceProviderPSTNISDNInternet

O - Voip, IptvM (, ) Internet

(broadband)

Internet

(E-ail) - WWW (World Wide Web) (ftp, p2p, torrents) (telnet) (Chat) - T video

@ () Outlook Express Microsoft Outlook( microsoft office)Webmail ( www) e-mail server

email @ .. dgkotzos@primedu.uoa.gr .. mail.primedu.uoa.gr

email @ 1. Internet 2. email www (www.gmail.com):

e-mail SMTP Microsoft OutlookOutlook Express e-mail www

www

Internet

Y (servers)

server .. www.uoa.gr o .

www (Server) (Client)www.ypepth.gr

(Server) www

() (URL) .. www.ypepth.gr

(www server) www.ypepth.gr

www (clients) Mozilla Firefox (www.firefox.com) Microsoft Internet Explorer ( windows)H (server) (url: Universal Resource Locator )

www.saferinternet.gr

(www.google.gr ) (http://dir.forthnet.gr/)