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1 1 2 (Internet) : ( internet) : IP (The Internet) = Web? Internet, 1960 ARPAnet (Advanced Research Project Agency) : IIJ () 3 4 = (etc.) + = 1 () A B: A3 defaut: A2 A1 A3 B1 defaut: A2 B B: A3 defaut: C2 A2 C C1 B2 defaut: B1 C2 defaut: C1 D1 B1 D2 Heo! D2 D3 D defaut: D1 defaut: D1

2 (Cont d) 5 6 () (MAC) (IP) B1 D2 Heo! = Protoco 7 8 HTTP (Web), SMTP ( ), DNS ( IP), TCP, UDP IP (Internet Protoco) Ethernet, Wi-Fi () SNS etc. 1 1 () Ethernet Cabe (Ethernet) (Loca Area Network, ) ( WAN (Wide Area Network, ) MAC (48=6) (ADSL) ( (Wi-Fi), (3G, 4G), ),

3 9 10 IP IP = IP IPIP IP *.* *.* ISP: Internet Service Provider IP *.* (8), 32 IP *.* *.* *.* * ~ * Yahoo! Japan IPISP IP (DHCP) Dynamic Host Configuration Protoco

4 IP 13 (Router) 14 IP IP IP, etc. IP IP IP *.* *.* Link *.* Link4 Link1 Link *.* Link2 Link4 Link *.* (1) () (0~65535) IP (We-known port) HTTP (Web) = TCP/80 SMTP () = TCP/25 DNS = UDP/ *.*

5 (2) 17 TCP/IP 18 TCP (TCP/IP) () TCP/IP UDP HTTP: Hyper Text Transfer Protoco (TCP/80) Web Web HTTPS (Hypertext Transfer Protoco Secure) (TCP/443) HTTP SMTP: Simpe Mai Transfer Protoco (TCP/25) DNS: Domain Name System (UDP/53) IP IP osaka-cu.ac.jp, yahoo.co.jp, etc. () () IPDNS (Domain Name System)

6 (1) 21 (2) 22 (TLD) jp TLD (TLD).com,.net,.org,.biz,.info,.name, ac ne co tokyo.tokyo,.nagoya,.moe,.ninja,. osaka-cu kyoto-u docomo softbank toyota nissan metro () it eng media t TLD.jp,.cn,.uk,.tv ex DNS (Domain Name System) 23 IP, NAT, IPv6 24 IP DNS. root (13).jp..jp.ac.jp. : osaka-cu.ac.jp. : media.osaka-cu.ac.jp. : nsookup IP(IPv4)2 32 (43) NAT () 2 IPv6 IPv (34011) IPv4IPv6 IPv6 2001:02F8:0023:xxxx:xxxx:xxxx:xxxx:xxxx

7 NAT (Network Address Transation) IP () ( ) IPNAT IP () IP 1 Internet A B C NAT Router /24?? ? TCP??? DNS? (Server Cient Mode) WWW (Word Wide Web) DNS (Domain Name System) (FTP) etc.

8 29 30 (Server) 24 WebDNS etc. Web Web Web Web (Web) Web (Cient) () Peer-to-Peer (P2P) 31 <HTML> xxx.co.jp 32 osaka-cu.ac.jp WWW WWW WWW WWW WWW GET /Science.htm WWW To:

9 33 34? / Googe (Since 1998) 35 Googe (Cont d) 36 PCWeb() Web (Page Rank) Tips Googe Googe () Googe Maps ( + ) Googe Earth () Gmai () YouTube () Googe () Googe ()

10 37 38 (coud) (on-premises) (coud computing) Web () Web Mai icoud (Appe) OneDrive (Microsoft) Office365 (Microsoft) Googe Googe Caendar Evernote Dropbox Gmai, Hotmai, Yahoo Mai, (Word), (Exce), (PowerPoint) () () SaaS (Software As A Service) Web Mai, Googe Drive PaaS (Patform As A Service) Amazon EC2, Googe App Engine IaaS (Infrastructure As A Service) OS Amazon Web Services (AWS), Microsoft Azure, Googe Compute Engine

11 OCU Mai () 44 xx.osaka-cu.ac.jp (OCU Mai) () () gmai.com, yahoo.co.jp, hotmai.com, docomo.ne.jp, softbank.ne.jp, au.com, Office365 for Education (Microsoft) WordExce Microsoft (2016) st (2017) : OCU Mai (2016) (2017) : 8!!

12 45 Outook (Office365) 46 Outook Outook Outook -- (2) 5 Outook () Re: res () From: To: () Cc: (Carbon Copy, ) Bcc: (Bind Carbon Copy) ToCcBcc Subject: (signature)! (From:)

13 HTML HTML HTML( spam) PCIP () (From:) From: (PGP)! 51 (ML) 52 Subject (!) To, Cc, Bcc HTML (Smiey) :-) (^_^) () : a@exampe.com (exampe) Googe ML! ML (ML ) Repy-To:

14 53 54 Web (Web Mai) Gmai Hotmai Yahoo! Mai () (spam) 55 (phishing) 56 ()8 Web Web (Thunderbird) Gmai, Hotmai () Web URL URL :

15 57 To:, Cc:, Bcc: From:? spam??

TCP/IP Internet Week 2002 [2002/12/17] Japan Registry Service Co., Ltd. No.3 Internet Week 2002 [2002/12/17] Japan Registry Service Co., Ltd. No.4 2

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