Networks and Security Chapter 4 Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Interview Nicholas Poretta Director of Telecommunications Atlantic City Convention Center Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Interview (cont.) Basics: Before anything else, visit local physical security-“have a good lock on that door” Analyze current hardware and software usage Maintain redundant links Have a backup plan! Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Interview (cont.) The future: Create a seamless, wireless network for the web enabled traveler that is secure! Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

1. Introduction Benefits of Networking Networking Objectives Allow resources to be shared Allow data and information to be shared Networking Objectives Security = Safe Performance = Fast Reliability = Running Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

2. Small Networks Nodes Network Interface Cards (NIC) Bits Per Second (BPS) Local Area Network (LAN) Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Medium Twisted Pair Copper Wires Coaxial Cable Fiber Optics Wireless RJ-11 RJ-45 Coaxial Cable Fiber Optics Wireless Selection of mediums must take into account distance and number of nodes to be served. Attenuation is the weakening of a signal IEEE (Institute for Electric and Electronic Engineers 10Base T: copper wire, 100 meters, 1,024 computers at 10mbps 10Base FL: fiber cable, 2,000 meters, 1,024 computers at 10mbps Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Network Architecture Topology Hub vs. Switch Bus Ring Star Hub vs. Switch Network Operating System (NOS) Servers File Print Database Web Client/Server (C/S) vs. Peer to Peer Private Branch Exchange (PBX) Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

3. Large Networks Convergence Channel Packet Switching vs. Circuit Switching Modem Multiplexers Concentrators Wide Area Networks (WAN) Bandwidth Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

4. Transmission Technologies ISDN (Integrated Services Digital Network) DSL (Digital Subscriber Lines) Cable Modems T1 Backbone Frame Relay Asynchronous Transfer Mode (ATM) T3 Synchronous Optical Network (SONET) Backbones are becoming more local. Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

5. The Internet Network Protocol TCP/IP (Others: NetBui and IPX) Error Checking Data Compression Sending Receiving TCP/IP (Others: NetBui and IPX) Gateways Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Internet Addresses IP Address Routers http://www.dns-tools.com/ Static vs. Dynamic Domain Name Server (DNS) IP Address: 198.4.159.10 Web Address: www.prenhall.com Domain: .com .edu .gov .int .mil .net .org Two-letter country code such as .us .uk .de ICANN: .biz .pro .museum .aero .name .coop .info Routers http://www.dns-tools.com/ http://www.networldmap.com/TryIt.htm Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

6. World Wide Web Part of the Internet Uniform Resource Locator (URL) Hypertext Markup Language (HTML) Extensible Markup Language (XML) Browsers Search Engines Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

7. Internet Layout Web Server Intranet Extranet Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

8. Large Wireless Networks Microwave Satellites Cellular Personal Communication Services (PCS) Wireless Application Protocol (WAP) Wireless Markup Language (WML) Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

9. Other Network Usage in the Enterprise Electronic Data Interchange (EDI) Example -payroll Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

10. Security Virtual Private Network (VPN) Firewall Demilitarized Zone (DMZ) Encryption (128-Bit) Internal Controls Social Engineering Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

11. Forward Looking Issues in Hospitality Videoconferencing Wireless Networks – Security Issues Voice Over Internet Protocol (VOIP) Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

12. Summary A “down” network can result in lost revenue Managers must understand networks, not just delegate Security all too important–have a plan and test it! Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

Further Information www.internetweek.com www.whatis.com www.redherring.com Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458