This 3-sentence summary provides an overview of the key points about the Internet from the given document: The document discusses the basics of how the Internet works, including defining common terms like IP address, domain name, servers, clients, and protocols used for different functions. It explains the process of how a user enters a URL to make a request, how the domain name is resolved to an IP address, and how the server sends back the requested content using the TCP/IP protocol. Common protocols for different functions like HTTP, FTP, and SMTP are also outlined.

1. http://www.edupub.gov.lk/e-books/english/ict.pdf
,izak; vd;gJ
• cynfq;FKs;s fzpdp tiyaikg;Gf;fspd;
Nru;f;ifahFk;.
• Information super highway
• Global village
• The internet society – NGO mjid epWtfpf;fpwJ.
• WAN-Wide Area Network
,izar; nrk;ik elg;nghOq;F Kftup
( Internet Protocol(IP) address)
• ,izaj;jpy; ,ize;Js;s xt;nthU fzpdpiaAk;
jdpj;Jtkhf ,dq;fhzy;.
• jrk Gs;spapdhy; Ntwhf;fg;gl;l 0-255 tiuahd
ehd;F ngWkhdq;fspdhy; tif Fwpf;fg;gLk;.(Dotted
decimal notation)
• Ex: 172.64.85.42
193.213.78.154
• IP Address ,izar; Nrit toq;Fdupdhy; (Internet Service
Provider- ISP); toq;fg;gLfpd;wJ. Ex: SLT, Dialog, Hutch, Mobitel
,izar; nra;gzp epfOk; tpjk;.
(How Internet Works )
1. gadu; tiyNkNyhbiaj; jpwe;J rPu;ik
,lg;gFjpapy; (URL) Eiojy;.
2. tiyNkNyhb URL ,id DNS Nritafj;jpw;F
topg;gLj;jy;.
3. DNS Nritafk; Clhf URL ,y; ,lg;gl;l
gadupd; ngau; IP Kftupahf khw;wPL
nra;ag;gly;.
4. IP Kftupiaf; nfhz;l ,iza
Nritafj;jpw;F Nfhupf;ifia topg;gLj;jy;.
5. ,izaNrit toq;Feuhy; HTML juTfs; kPs
toq;fg;gly;.
6. tiyNkNyhb %ykhf HTML ,izag;gf;fj;ij
jpiuapy; fhl;rpg;gLj;jy;.
INTERNET
By: Raza Malhardeen Sir Beng(Hons), Btec HND
nrk;ik elg;G tof;F
(Protocol)
gad;ghL
HTTP
Hyper Text Transfer
Protocol
HTML Mtzg; gupkhw;wk;
TCP/IP
Transmission
Control Protocol /
Internet protocol
IP Kftupg; gupkhw;wy;
fl;Lg;ghL
FTP File Transfer
Protocol
Nfhg;Gg; gupkhw;wk;
SMTP
Simple Mail
Transfer Protocol
kpd;dQ;ry; gupkhw;wk;
ICMP
Internet Control
Message Protocol
tO Vw;gLk; NghJ
njuptpj;jYk; nra;jpf;
fl;Lg;ghLk;
nrk;ik elg;G tof;F (Protocol)
URL IP
www 225.
• Nritia toq;Fk; fzzp nritaff;fzzp/ Nrit
jUeu; fzzp (Server Computer) vd miof;fg;gLk;
• Nritia ngUk; fzzp Nrit gadu; fzzp
(Client Computer) vd miof;fg;gLk;
• Nrit jUeu; fzzp jfty;fis Nrit gadUf;F
toq;Fjy; jutpwf;fk; (Download) vd miof;fg;gLk;
• Nrit gadUf;F fzzp jfty;fis toq;Fjy;
gjpNtw;wk; (Upload) vd miof;fg;gLk;
Typed
By:
Nisma
Nilam
Ms;fsg; ngau; cau; kl;l Ms;fsg; ngau;
Domain name and Top level Domain
Ms;fsg; ngau; Country domain
com – thzpfk; lk – ,yq;if
org – ,yhg Nehf;fw;w
mikg;G
in – ,e;jpah
edu- fy;tp au – mT];Nuypah
gov- muR uk – If;fpa ,uhr;rpak;
net- tiyaikg;G jp – [g;ghd;
Suggestion and correction 0777162511 | Mraza.edu@gmail.com
GRADE 11
Lesson 3
1st© 2020
,izak;