1 Internet Hiroshi Toyoizumi

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. X

4 Connect two machines Sharing the information between two machines.  Copying files etc.

5 Local Area Network (LAN) Connecting machines. Hub

6 The Internet Connecting LANs globally. Company A University B Agency C Lab. D Provider E domain

7 What’s the Internet: “nuts and bolts” view millions of connected computing devices: hosts, end-systems  pc’s workstations, servers  PDA’s phones, toasters running network apps communication links  fiber, copper, radio, satellite routers: forward packets (chunks) of data thru network local ISP company network regional ISP router workstation server mobile

8 Domain The name of organization connected to the internet.  waseda.jpWaseda University  waseda.ac.jp  ntt.co.jpNTT  kantei.go.jpJapanese government

9 Structure of Domain Name Domain name is consisted by the name, attributes and nationality of organization.   What is waseda.ac.jp?  “waseda” is the name of organization, “ ac” represents academia, and “jp” means japan.  Nationality  ca:Canada uk:United Kingdom fr:France au:Australia etc.  Attributes  co:company go:government ne:internet 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.   Consisted by network number and computer number.  Domain name  tractable for human being  computer-----aoni.waseda.jp   URL-----

11 Example of address NTT Waseda Fukushima government waseda.ac.jp ntt.co.jp pref.fukushima.jp ルータ den.ntt.co.jp ( ) aoni.waseda.jp ( ) URL mail address Domain name address

12 What you can do using internet Browsing （ World Wide Web(WWW ）） 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)

14 WWW(2) Netscape Navigator

15 WWW(3) Internet Explorer

16 A Simple HTML Example A Simple HTML Example HTML is Easy To Learn Welcome to the world of HTML. This is the first paragraph. While short it is still a paragraph! And this is the second paragraph. This is an example of link. Click it! This is also an example of inline image. Can you find where the original is?

17 Result of the Simple HTML Example

18 Outlook

19 Outlook

20 FTP Transfer (get or put) files via network.

21 telnet You can access to other computers.

22 News, BBS You can discuss a specific topic and sharing information.

23 Chat Chat using text (or even voice).

24 Multimedia Player Play movies or music on the internet.

25 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 don ’ t have to consider the national border. Distance education and distance medical care. Reduced cost of transportation.

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

27 Internet Technology Protocol Routing

28 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.

29 Hierarchy Application Presentation Session Transport Network Data link Physical Application Presentation Session Transport Network Data link Physical Data unit Add header Remove header Communication link Hierarchical Protcol

30 What is Routing You need to decide a path from source to destination in order to transmit your data. A Ltd. B University C office router destinationPort # C office1 B university2 Routing table 1 2

31 Variation of routing  Routing methods  Static routing You don ’ t change the route which is decided at the beginning.  Dynamic routing Depending on the network condition, the optimal route is automatically found and configured.

32 Examples of Your Assignments 1. Blog 2. Search Engines 3. Streaming Service 4. Instant Message 5. Internet Service Provider 6. ADSL 7. Peer-to-Peer 8. Hot Spot 9. XML 10. E-commerce

33 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.

34 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) (2)WWW(3)ftp(4)BBS (5)telnet(6)chat(7)multimedia player This is just an example of Midterm Exam!

35 Easy steps to submit your solution 1. Make a file describing your solution on your PC. You can use anything to describe it, word, power point, plain-text, html… 2. Name the file with your student ID. For example, w doc. 3. 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.