1. SPARCS 11 Sunguard

2. WEB ? Basic Concept of “WEB” Page. 02

3. WEB ? Basic Concept of “WEB” Page. 03

4. WEB ? Basic Concept of “WEB” Page. 04

5. WEB ? Basic Concept of “WEB” Page. 02

6. WEB ? Brief History of “WEB” – Who & Why Who Created ‘WEB’ ? -Tim Berners Lee -Robert Cailliau CERN laboratory in Switzerland CERN = European Council for Nuclear Research Why made ‘WEB’ ? To make Information Interchange easily and effectively

7. WEB ? Brief History of “WEB” – Tim Berners Lee Who is ‘Tim Berners Lee’ ? -The Father of ‘World Wide Web’ -Developed ‘Enquire’  ‘WWW’ -Designed >>‘HTTP(HyperText Transfer Protocol)’ ‘HTML(HyperText Markup Language)’ ‘URL(Uniform Resource Locator)’ -Developed ‘Web Browser, Mosaic’ -Established ‘W3C(World Wide Web Consortium)’

8. WEB ? Brief History of “WEB” – Enquire & Mosaic Enquire!? -This concept is that… “Wherever computer is exists, if we can read data of it, that will be able to compose the huge information space.” Mosaic!? -The first Web Browser!! -The first Multimedia GUI program!! -It had been developed since 1987, but in 1997(January 7 th ), it stopped. (After story… Mark Andreesen & James Clark  Mosaic Communications Corp.  Spyglass Mosaic  Internet Explorer(Licensed by Microsoft.) http://en.wikipedia.org/wiki/Mosaic_(web_browser)

9. WEB ? Introduction of Web Browser What kinds of…? -Internet Explorer, Mozilla Firefox, Opera, Safari, Google Chrome, Navigator, Avant, Flock, Kmelon, MineField, SeaMonkey, Shiretoko, WebMaster, JW Browser, Road Browser, The World, etc.

10. WEB ? Introduction of Web Browser Web BrowserWeb Server HTTP suppose Web Standards!! What is that? http://en.wikipedia.org/wiki/Web_standards HTML, XML, XHTML, Graphic File Format, CSS, JAVAscript(DHTML), etc. http://en.wikipedia.org/wiki/Web_Browser And… TRANSLATE them!! But, Now… Something is different

11. WEB ? Brief Introduction for Web Server as Software… -Client/Server Model & Request/Response -Kinds of PROGRAM -Port Number : 80 -Examples : APACHE, IIS, LOTUS DOMINO SERVER, etc. http://en.wikipedia.org/wiki/Web_server

12. WEB ? Brief Introduction for HTTP HTTP(Hyper Text Transfer Protocol) -This is PROTOCOL! -Between Client & Server, this is the “Request/Response Protocol” Request Response HTML, CSS, JavaScript, etc. + Error Code http://ko.wikipedia.org/wiki/HTTP#.EC.98.A4.EB.A5.98_.EC.BD.94.EB.93.9C

13. WEB ? Brief Introduction for URL URL(Uniform Resource Locator) -Form! & Protocol! -We can manage and describe the addresses of accessible resources easily with URL Form of URL URL = Protocol + Domain Name(or IP address) + Directory Telnet, FTP, HTTP -Telnet is the method that makes clients who have the authority to use the host computer be able to access to other’s host computer remotely. -This is also protocol which is based on TCP/IP -Difference with ‘FTP, HTTP’ is that client can “Log on” http://terms.co.kr/Telnet.htm

14. WEB ? Brief Introduction for URL URL(Uniform Resource Locator) -Form! & Protocol! -We can manage and describe the addresses of accessible resources easily with URL Form of URL URL = Protocol + Domain Name(or IP address) + Directory Telnet, FTP, HTTP -File Transfer Protocol -To transfer files between computer and computer. -Based on TCP/IP -Security Issue : Password is not encrypted.  SFTP(through SSH), SCP(Secure CoPy) http://terms.co.kr/FTP.htm

15. WEB ? Brief Introduction for URL URL(Uniform Resource Locator) -Form! & Protocol! -We can manage and describe the addresses of accessible resources easily with URL Form of URL URL = Protocol + Domain Name(or IP address) + Directory Telnet, FTP, HTTP -Explained before… So! SKIP

16. WEB ? Brief Introduction for URL URL(Uniform Resource Locator) -Form! & Protocol! -We can manage and describe the addresses of accessible resources easily with URL Form of URL URL = Protocol + Domain Name(or IP address) + Directory Server Name + Group(Apparatus) Name + Characteristic Code http://terms.co.kr/DNS.htm

17. WEB ? Brief Introduction for URL URL(Uniform Resource Locator) -Form! & Protocol! -We can manage and describe the addresses of accessible resources easily with URL Form of URL URL = Protocol + Domain Name(or IP address) + Directory

18. WEB ? Brief Introduction for HTML HTML(Hyper Text Markup Language) -Markup Language!!(with CSS, Script) : Describe how to show Texts or Images on Web Browser -Be formed with Tag attributes What kinds of…?(Doctypes) Strict, Transitional, Frameset http://www.w3schools.com/ “Details about HTML”

19. E-Mail ? What is E-Mail ? Electronic Mail BBUE-ING! E-Mail(Electronic Mail) -A method of exchanging digital messages from an author to one or more recipients -E-mail Address : User_ID@Mail_Server_Name

20. 슬라이드 쇼가 끝났습니다. 끝내려면 마우스를 클릭하십시오.

21. E-Mail ? Brief Introduction for Principle of E-Mail Send & Receive E-mail

22. E-Mail ? Brief Introduction for Principle of E-Mail Send & Receive E-mail http://wlan.egloos.com/10222487

23. E-Mail ? Sending & Receiving E-mail Mail Server MUA(Mail User Agent) Write & Send E-mail MDA(Mail Delivery Agent) MTA(Mail Transfer Agent) Mail Server MUA(Mail User Agent) Receive & Read E-mail MDA(Mail Delivery Agent) http://cusee.net/102

24. E-Mail ? E-Mail Protocols – Basic Concept What kinds of… -IMAP (Internet Message Access Protocol) -POP3 (Post Office Protocol 3) -SMTP (Simple Mail Transfer Protocol) -HTTP (HyperText Transfer Protocol)

25. E-Mail ? E-Mail Protocols Mail Server MUA(Mail User Agent) Write & Send E-mail MDA(Mail Delivery Agent) MTA(Mail Transfer Agent) Mail Server MUA(Mail User Agent) Receive & Read E-mail MDA(Mail Delivery Agent) http://www.emailaddressmanager.com/tips/mail-servers.html POP3 IMAP HTTP SMTP POP3 IMAP HTTP

26. E-Mail ? E-Mail Protocol - SMTP SMTP(Simple Mail Transfer Protocol) -Based on TCP/IP -Used by the Mail Transfer Agent(MTA) > To deliver your E-mail to the recipient's mail server -Can only be used to send emails, not to receive them -Depending on your network / ISP settings, you may only be able to use the SMTP protocol under certain conditions -Port 25 -Secure SMTP(SSMTP) : port 465 http://www.ietf.org/rfc/rfc0821.txt

27. E-Mail ? E-Mail Protocol – POP3 POP3(Post Office Protocol 3) -Provides a simple, standardized way for users > To access mailboxes > To download messages to their computers (Mail Server  user’s Local computer) -Users can choose to leave copies of their E-mails on the server -The advantage :: Once messages are downloaded on users’ local computer, users can read their E-mails when they are on off-line. -But… users might read all messages which include Spam-mails, and so on when they are using this protocol to download messages to local computer. -Port 110 -Secure POP3(SSH-POP) : port 995 http://www.faqs.org/rfcs/rfc1939.html

28. E-Mail ? E-Mail Protocol - IMAP IMAP(Internet Message Access Protocol) -A standard protocol for accessing e-mail from a user’s local server -A client/server protocol in which e-mail is received -As this requires only a small data transfer, this works well even over a slow connection such as a modem -Port 143 -Secure IMAP(IMAP4-SSL) : port 585 -IMAP4 over SSL : port 993 http://www.imap.org/

29. E-Mail ? POP3 and IMAP

30. E-Mail ? E-Mail – Header & Body E-mail; Header -This header keeps important resources -Users can’t see this -Server Name, Message ID, Send Date/Time, Send Route, Encoding setting Language Information, etc. http://cusee.net/102 E-mail; Body -Contents and Messages in e-mail -Attachments in e-mail

31. E-Mail ! E-Mail !!

32. Mailing List ? What is Mailing List ? Mailing List is… JUST MAILING LIST!

33. Mailing List ? How does it work ? wheel-seminar@sparcs.org Mail Server (sparcs.org) OH? Mailing List…?! /etc/aliases /home/sparcs/mail/aliases.d/wheel-seminar bbashong, rodumani, sunguard, boolgom, overmania, podo, alphamin, leeopop, gangok, cling, grandmarnier, etc. + @sparcs.org http://www.niso.org/khelp/kmlm/user_help/html/intro_lists_aliases.html

34. Reference Where you can get more information http://zenome.com.ne.kr/devzone/server_side/mailserver/princi.html http://python.kr/viewtopic.php?p=35286&sid=90ba518f728aa9be294ce4edcf7c43a5 http://cusee.net/102 http://wlan.egloos.com/10222487 http://en.wikipedia.org/wiki/Mosaic_(web_browser) http://en.wikipedia.org/wiki/Web_Browser http://en.wikipedia.org/wiki/Web_standards http://en.wikipedia.org/wiki/Web_server http://ko.wikipedia.org/wiki/HTTP#.EC.98.A4.EB.A5.98_.EC.BD.94.EB.93.9C http://terms.co.kr/Telnet.htm http://terms.co.kr/FTP.htm http://www.w3schools.com/ http://www.emailaddressmanager.com/tips/mail-servers.html http://www.ietf.org/rfc/rfc0821.txt http://www.faqs.org/rfcs/rfc1939.html http://www.imap.org/ http://www.niso.org/khelp/kmlm/user_help/html/intro_lists_aliases.html

35. END Thank you for listening! SunGuard