1 2 (Internet) : ( internet) : IP (The Internet) = Web? Internet, 1960 ARPAnet (Advanced Research Project Agency) : 1988 1989 + 1992 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
(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, ) 11500 MAC (48=6) (ADSL) ( (Wi-Fi), (3G, 4G), ),
9 10 IP IP = IP IPIP IP 11 160.193.*.* 133.2.*.* ISP: Internet Service Provider IP 123.10.*.* 12 160.193.113.20 410 0255(8), 32 IP 160.193.*.* 133.1.*.* 133.11.*.* 124.83.128.* ~ 124.83.255.* Yahoo! Japan IPISP IP (DHCP) Dynamic Host Configuration Protoco
IP 13 (Router) 14 IP IP IP, etc. IP IP IP 123.10.*.* 15 160.193.*.* Link3 133.2.*.* Link4 Link1 Link2 123.10.*.* Link2 Link4 Link3 160.193.*.* (1) () (0~65535) IP (We-known port) HTTP (Web) = TCP/80 SMTP () = TCP/25 DNS = UDP/53 1 16 133.2.*.*
(2) 17 TCP/IP 18 TCP (TCP/IP) () TCP/IP UDP 19 20 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. () () + www.media.osaka-cu.ac.jp, www.osaka-cu.ac.jp IPDNS (Domain Name System)
(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) 2011 1 NAT () 2 IPv6 IPv62 128 (34011) IPv4IPv6 IPv6 2001:02F8:0023:xxxx:xxxx:xxxx:xxxx:xxxx
NAT (Network Address Transation) 25 26 1IP () ( ) 10.0.0.0 10.255.255.255 172.16.0.0 172.31.255.255 192.168.0.0 192.168.255.255 IPNAT IP () IP 1 Internet A B C 192.168.1.2 192.168.1.4 192.168.1.3 NAT Router 150.99.10.20 192.168.1.1 192.168.1.0/24?? 160.193.1.1? TCP??? DNS? 27 28 (Server Cient Mode) WWW (Word Wide Web) DNS (Domain Name System) (FTP) etc.
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: xxx@osaka-cu.ac.jp http://www.xxx.co.jp/science.htm
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 ()
37 38 (coud) (on-premises) (coud computing) Web () 39 40 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
41 42 43 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 : @st.osaka-cu.ac.jp (2016) st student @2.osaka-cu.ac.jp (2017) : https://www.ips.media.osaka-cu.ac.jp/ OCU Mai https://office.com/ : @m.ocu.jp (2016) (2017) : 8!!
45 Outook (Office365) 46 Outook Outook Outook -- (2) 5 Outook () 47 48 Re: res () From: To: () Cc: (Carbon Copy, ) Bcc: (Bind Carbon Copy) ToCcBcc Subject: (signature)! (From:)
HTML 49 50 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:
53 54 Web (Web Mai) Gmai (Googe) @gmai.com Hotmai (Microsoft) @hotmai.com Yahoo! Mai (Yahoo) @yahoo.co.jp () (spam) 55 (phishing) 56 ()8 Web Web (Thunderbird) Gmai, Hotmai () Web URL URL : http://www.antiphishing.jp/
57 To:, Cc:, Bcc: From:? spam??