SPARCS 11 Sunguard

WEB ? Basic Concept of “WEB” Page. 02

WEB ? Basic Concept of “WEB” Page. 03

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 7 th ), it stopped. (After story… Mark Andreesen & James Clark  Mosaic Communications Corp.  Spyglass Mosaic  Internet Explorer(Licensed by Microsoft.)

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 Web BrowserWeb Server HTTP suppose Web Standards!! What is that? HTML, XML, XHTML, Graphic File Format, CSS, JAVAscript(DHTML), etc. And… TRANSLATE them!! But, Now… Something is different

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.

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

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”

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)

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

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”

? What is ? Electronic Mail BBUE-ING! (Electronic Mail) -A method of exchanging digital messages from an author to one or more recipients - Address :

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? Brief Introduction for Principle of Send & Receive

? Brief Introduction for Principle of Send & Receive

? Sending & Receiving Mail Server MUA(Mail User Agent) Write & Send MDA(Mail Delivery Agent) MTA(Mail Transfer Agent) Mail Server MUA(Mail User Agent) Receive & Read MDA(Mail Delivery Agent)

? 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)

? Protocols Mail Server MUA(Mail User Agent) Write & Send MDA(Mail Delivery Agent) MTA(Mail Transfer Agent) Mail Server MUA(Mail User Agent) Receive & Read MDA(Mail Delivery Agent) POP3 IMAP HTTP SMTP POP3 IMAP HTTP

? Protocol - SMTP SMTP(Simple Mail Transfer Protocol) -Based on TCP/IP -Used by the Mail Transfer Agent(MTA) > To deliver your to the recipient's mail server -Can only be used to send s, 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

? 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 s on the server -The advantage :: Once messages are downloaded on users’ local computer, users can read their s 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

? Protocol - IMAP IMAP(Internet Message Access Protocol) -A standard protocol for accessing from a user’s local server -A client/server protocol in which 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

? POP3 and IMAP

? – Header & Body ; 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. ; Body -Contents and Messages in -Attachments in

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

Mailing List ? How does it work ? 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.

Reference Where you can get more information

END Thank you for listening! SunGuard