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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. Internet Addresses IP Address Routers http://www.dns-tools.com/
Static vs. Dynamic
Domain Name Server (DNS)
IP Address:
Web Address:
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
Technology Strategies for the Hospitality Industry © 2005 Pearson Education, Inc
Nyheim, McFadden, & Connolly Upper Saddle River, New Jersey 07458

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

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