Internet

1
Internet

• Hiroshi Toyoizumi
• Toyoizumi_at_waseda.jp

2
Introduction of the Internet

• System of Internet
• What can be done using Internet
• Merit of Internet
• Technologies in the Internet
• Protocol
• Routing

3
Stand Alone

• Computers are used to be standing alone.

4
Connect two machines

• Sharing the information between two machines.
• Copying files etc.

5
Local Area Network (LAN)

• Connecting machines.

6
The Internet

• Connecting LANs globally.

7
Whats the Internet nuts and bolts view

• millions of connected computing devices hosts,
  end-systems
• pcs workstations, servers
• PDAs phones, toasters
• running network apps
• communication links
• fiber, copper, radio, satellite
• routers forward packets (chunks) of data thru
  network

8
Domain

• The name of organization connected to the
  internet.
• waseda.jp Waseda University
• waseda.ac.jp
• ntt.co.jp NTT
• kantei.go.jp Japanese government

9
Structure of Domain Name

• Domain name is consisted by the name, attributes
  and nationality of organization.
• http//www.internic.net/faqs/authoritative-dns.htm
  l
• What is waseda.ac.jp?
• waseda is the name of organization, ac
  represents academia, and jp means japan.
• Nationality
• caCanada ukUnited Kingdom frFrance
  auAustralia etc.
• Attributes
• cocompany gogovernment neinternet provider
• Name
• You can name it!

10
Address

• You need address to send a message to the
  computer on the receiver side.
• Use IP address or domain name.
• IP address
• Handled by computers.
• 164.125.25.10
• Consisted by network number and computer number.
• Domain name
• tractable for human being
• computer ----- aoni.waseda.jp
• mail ----- toyo_at_aoni.waseda.jp
• URL ----- www.waseda.ac.jp

11
Example of address
URL
address
Domain name
den.ntt.co.jp (210.173.163.201)
www.abc.pref.fukushima.jp
ntt.co.jp
Fukushima government
???
address
Domain name
aoni.waseda.jp (202.225.207.18)
pref.fukushima.jp
mail address
Domain name
toyo_at_aoni.waseda.ac.jp
waseda.ac.jp
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What you can do using internet

• Browsing( World Wide Web(WWW))
• E-mail
• FTP file transfer
• telnet remote login to other computers
• BBS (electric bulletin board)
• Chat
• Multimedia player (Video, music)

13
WWW

• System to make and look homepages.
• Using hyper link.
• Browsers
• Netscape Navigator
• Internet Explorer
• Making Home pages
• Use HTML (Hyper Text Markup Language)

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WWW(2)

• Netscape Navigator

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WWW(3)

• Internet Explorer

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A Simple HTML Example

• lthtmlgt
• ltheadgt 
• ltTITLEgt A Simple HTML Example lt/TITLEgt
• lt/headgt    
• ltbodygt
•   ltH1gt HTML is Easy To Learn lt/H1gt        
• ltPgtWelcome to the world of HTML. This is the
  first paragraph. While short it is still a
  paragraph!lt/Pgt     
• ltPgtAnd this is the second paragraph.lt/Pgt 
• ltPgtThis is an example of link.
• ltA HREF"http//www.u-aizu.ac.jp/toyo"gtClick
  it!lt/Agt 
• lt/Pgt 
• ltPgtThis is also an example of inline image. Can
  you find where the original is?ltBRgt
• ltIMG SRChttp//www.waseda.jp/sils/img/ph_title
  .jpggt
• lt/Pgt 
• lt/bodygt     
• lt/htmlgt

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Result of the Simple HTML Example
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Make your own HTML file

• Edit the following sample.
• Save it with an appropriate name on your desktop.
• Preview your file by your browser.
• Sample
• lthtmlgt
• ltheadgt 
• ltTITLEgt This is title of your page lt/TITLEgt
• lt/headgt    
• ltbodygt
•   ltH1gt This the header! lt/H1gt        
• ltPgtWelcome to the world of HTML. This is the
  first paragraph. While short it is still a
  paragraph!lt/Pgt     
• ltPgtAnd this is the second paragraph.lt/Pgt 
• ltPgtThis is an example of link.
• ltA HREF"http//www.u-aizu.ac.jp/toyo"gtClick
  it!lt/Agt 
• lt/Pgt 
• ltPgtThis is also an example of inline image. Can
  you find where the original is?ltBRgt
• ltIMG SRChttp//www.waseda.jp/sils/img/ph_title
  .jpggt
• lt/Pgt 

19
E-mail

• Outlook

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E-mail

• Outlook

21
FTP

• Transfer (get or put) files via network.

22
Upload Your HTML

• Find your ftp server of waseda net.
• xxx_at_aoni.waseda.jp
• ftp.aoni.waseda.jp
• Use a ftp tool named ffftp to connect the server.
• Upload the file onto the server.
• Check your first home page at
• www.yyyy.waseda.jp/xxx

23
telnet

• You can access to other computers.

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News, BBS

• You can discuss a specific topic and sharing
  information.

25
Chat

• Chat using text (or even voice).

26
Multimedia Player

• Play movies or music on the internet.

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Advantages of internet

• You can access global information without going
  there.
• You can communicate with people all over the
  world.
• You can do business world wide.
• You dont have to consider the national border.
• Distance education and distance medical care.
• Reduced cost of transportation.

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Quiz

• Explain what we can do using the following
  applications.
• (1)e-mail (2)WWW
• (3)ftp (4)BBS
• (5)telnet (6)chat
• (7)multimedia player

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Internet Technology

• Protocol
• Routing

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What is Protocol?

• Protocol is the rule for communication.
• As you need to follow the traffic rule when you
  drive a car, you need to follow the rule during
  communication.
• Internet employs a protocol called TCP/IP is
  mainly used.
• IP Rule for controlling path along internet.
• TCP Rule for transfer data without error.

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Hierarchy
Hierarchical Protcol
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What is Routing

• You need to decide a path from source to
  destination in order to transmit your data.

router
router
1
2
router
Routing table
destination Port
C office 1
B university 2
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Variation of routing

• Routing methods
• Static routing
• You dont change the route which is decided at
  the beginning.
• Dynamic routing
• Depending on the network condition, the optimal
  route is automatically found and configured.

34
Examples of Your Assignments

1. Blog
2. RSS
3. Streaming Service
4. Instant Message
5. Podcast
6. xDSL/Fiber-to-the-home
7. Peer-to-Peer
8. Hot Spot
9. XML
10. E-commerce/Auction
11. Wiki
12. Social Networking Site

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Procedure of group work

• Research
• Select a topic and do research.
• Study and discuss the findings.
• Preparation of Presentation
• Arrange the findings.
• Consider the effective ways to show your finding.
  
• Upload the related documents to the Web server.

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Midterm Exam Problem(30 min.)

• Suppose you are a non-fiction writer. You are
  asked to write a non-fiction article about
  Bali-island on an on-line magazine.
• Describe how you prepare and write the
  non-fiction article by using the power of
  internet. Use the following tools as many as you
  can and explain how you are going to use it.
• (1)e-mail (2)WWW (3)ftp (4)BBS
• (5)telnet (6)chat (7)multimedia player

This is just an example of Midterm Exam!
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Easy steps to submit your solution

• Make a file describing your solution on your PC.
  You can use anything to describe it, word, power
  point, plain-text, html
• Name the file with your student ID. For example,
  w1111111.doc.
• Place your file on the shared folder as ordered
  in the class.
• Or you can write your solution with pen and
  paper, and submit it by your own HAND.