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SPARCS 11
Sunguard
WEB ?
Basic Concept of “WEB”
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WEB ?
Basic Concept of “WEB”
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WEB ?
Basic Concept of “WEB”
Page. 04
WEB ?
Basic Concept of “WEB”
Page. 02
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
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)’
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 7th), 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)
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.
WEB ?
Introduction of Web Browser
What is that?
But, Now…
suppose Web Standards!!
Something is different
HTTP
Web Browser
HTML, XML, XHTML,
Graphic File Format, CSS,
JAVAscript(DHTML), etc.
Web Server
And… TRANSLATE them!!
http://en.wikipedia.org/wiki/Web_Browser
http://en.wikipedia.org/wiki/Web_standards
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
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
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
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
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
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
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
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
“Details about HTML”
http://www.w3schools.com/
E-Mail ?
What is E-Mail ?
Electronic Mail
BBUE-ING!
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
슬라이드 쇼가 끝났습니다. 끝내려면 마우스를 클릭하십시오.
E-Mail ?
Brief Introduction for Principle of E-Mail
Send & Receive E-mail
E-Mail ?
Brief Introduction for Principle of E-Mail
Send & Receive E-mail
http://wlan.egloos.com/10222487
E-Mail ?
Sending & Receiving E-mail
MUA(Mail User Agent)
MUA(Mail User Agent)
Write & Send E-mail
Receive & Read E-mail
MDA(Mail Delivery Agent)
MDA(Mail Delivery Agent)
Mail Server
Mail Server
MTA(Mail Transfer Agent)
http://cusee.net/102
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)
E-Mail ?
E-Mail Protocols
MUA(Mail User Agent)
MUA(Mail User Agent)
Write &POP3
Send E-mail
IMAP
HTTP
POP3
Receive &
Read E-mail
IMAP
HTTP
MDA(Mail Delivery Agent)
MDA(Mail Delivery Agent)
Mail Server
Mail Server
SMTP
MTA(Mail Transfer Agent)
http://www.emailaddressmanager.com/tips/mail-servers.html
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
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
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/
E-Mail ?
POP3 and IMAP
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.
E-mail; Body
- Contents and Messages in e-mail
- Attachments in e-mail
http://cusee.net/102
E-Mail !
E-Mail !!
Mailing List ?
What is Mailing List ?
Mailing List is…
JUST MAILING LIST!
Mailing List ?
How does it work ?
[email protected]
OH? Mailing List…?!
Mail Server
(sparcs.org)
/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
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
END
Thank you for listening!
SunGuard