Chapter 10 Internet and New Information Technology Infrastructure

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Don't hesitate to comment below if you have any questions or additional phrases Chapter 10 Internet and New Information Technology Infrastructure ,IT Infrastructure Enterprise Networking An arrangement of the organization's hardware, software, network and data resources Puts power on the desktop computer In large companies, infrastructure is composed of multiple networks High-capacity backbone network connects many LANs Internetworking - Linking separate networks, each of which retains its identity Information Systems for Management ,Standards and Connectivity Connectivity A measure of how well computers and computer-based devices communicate and share information without human intervention Open Systems Software that operates on different hardware Using IT standards in developing application software and communication network software Information Systems for Management ,Models of Connectivity TCP/IP (Transmission control protocol/internet protocol) Used in the Internet, allows different types of computers to communicate OSI (Open Systems Interconnection) Seven layers, international reference model Information Systems for Management ,Application HTTP SMTP POP3 FTP Telnet Presentation Session Transport TCP UDP Network IP Datalink NIC Driver Physical OSI and TCP/IP Networks Each software layer performs certain job and passes output to next layer. In Internet, same jobs performed by fewer layers. Information Systems for Management ,Internet Capabilities E-mail Person-to-person messaging; document sharing Usenet Newsgroups Discussion groups using electronic bulletin boards List Servers Discussion groups using email list servers Chat Rooms Interactive conversations Instant messaging Information Systems for Management ,Internet Capabilities Telnet Remotely work on one computer while logged on to another FTP (File Transfer Protocol) Transfer of files from computer to computer World Wide Web Display multimedia documents, retrieve information using hyperlinks (URLs – see below) Information Systems for Management , Root .net .com .edu .org .ca umanitoba Domains cc spica (Web server for university Web site and course sites) Addresses on Internet Each computer has IPAddress ("Internet address") - unique combination of 4 numbers (e.g. 130.179.16.50) Corresponding Domain Name System label (e.g., www.umanitoba.ca or spica.cc.umanitoba.ca for 130.179.16.50) DNS = method of addressing using idea of inverted tree Information Systems for Management ,Internet Service Providers (ISP) A commercial organization with a permanent connection to the Internet that sells temporary connections to subscribers High speed – always on Shaw – Cable Modem MTS – DSL Dial-up AOL Sympatico Information Systems for Management ,Uniform Resource Locator (URL) URL (Uniform Resource Locator) Naming method used with Web; extends DNS by specifying directories and file names – hypertext links (example: home.cc.umanitoba.ca/~btravica/9200/chapter10.ppt ) HTTP (HyperText Transfer Protocol) The communications standard used to transfer pages on the Web Defines how messages are formatted and transmitted So "http://..." says to the Web browser – "Use http to transfer what is at that URL and show it in my Web browser". Information Systems for Management ,Intranets & Extranets Intranet (written with lowers case "i" vs. "I" in Internet) Private network using Internet technology Protected from outsiders by firewalls Hardware and/or software placed between intranet and external networks to prevent outsiders from invading internal networks Extranet Intranets that allow authorized access by external stakeholders (e.g., suppliers, customers) Information Systems for Management ,Wireless Web Wireless Web Standards Allow Web content to be reformatted to fit small screens (cell phone) WAP (wireless application protocol) Uses Wireless Markup Language (WML) Optimized for tiny displays (e.g., cell phones) I-mode Developed in Japan, being intro