Dialup Internet Access. Broadband Networks. Broadband Connectivity. Broadband Challenges. Connectivity Options. State of the Art

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1 Dialup Internet Access Broadband Networks A Practical Guide for Educators Problem - Speed World Wide Wait Telephone lines Using Technology designed for voice not computers Analog Modems are at the limit of their capability Technology Solution - Broadband Jack L. Espinal Northern Virginia Cluster Broadband Connectivity Fast Internet Connection Permits: Fast Web Page Download Quick loading Graphics Multiple Photos High Quality Audio Streaming Audio and Video Broadband Challenges Technology has been slow in coming Technology has had its Problems Many Technologies & Options Available Not available in your area Complex Setup Multiple Technician Visits Low Reliability When It Worked, It was Great State of the Art Great Progress has been Made Self Setup is now Possible More Reliable Self Configuring Meeting Expectations Connectivity Options IDSN Digital Subscriber Lines (DSL) Cable Satellite Connection Microwave Radio Each has advantages and disadvantages

2 ISDN Digital Subscriber Line Old Technology Uses existing telephone lines Expensive Metered Service Almost No Distance Limitations Two 64 kbs lines Can be combined for data Split for phone and data Multiple Options ADSL - 6,100 Kbps up 1,500 Kbps Down 18,000 ft G.lite- 1,500 Kbps up 512 Kbps Down 18,000 ft HDSL- 1,544 Kbps up 1,544 Kbps Down 18,000 ft IDSL- 144 Kbps up 144 Kbps Down 36,000 ft VDSL- 52,000 Kbps up 3,000 Kbps Down 4,000 ft Speed Depends on Distance May not Get What Was Promised Dedicated Bandwidth What do the Speeds Mean? Video Clips Media Clip Telephone Wire DSL Terms Phone Line Distance to Central Office May not be the Distance Found on the Net Age and Size of the Wire In-house Wire Considerations DSL Modem or Router In-house Telephone Wiring Network Interface Device (NID) Local Loop DSL Access Multiplexer (DSLAM) Point of Presence (PoP) All of these can affect access and speed

3 DSL Horror Stories Advantages / Disadvantages Long waits for connection May Deal with Provider and Telco Promises May not be Delivered Provider Failures Dedicated Bandwidth Not Time Dependent Telephone Company and Internet Provider Service May Not Be Reliable Static IP Addresses More Common Equipment Needed DSL Filter Modem Router Filter Hub Cables DSL Modem DSL Modem Connections

4 Network Hub Cable Uses Traditional Cable TV Systems Shared Bandwidth with All Cable Users Limits On Amount of Information Carried Can be 5 Time Greater than ADSL Slows down during peak use times Fiber Optics better than Copper Advantages / Disadvantages Cable Modem Distance is not a major factor Often Limited to Home Users Often have both a Cable & Internet Provider Dynamic IP Address is the Norm Satellite Connection Other Technology Two Technologies Telephone Up, Satellite Down 56 Kbps Up 400 Kbps Down Can be Time Lags Distance to the Satellite Satellite Both Ways Kbps Large Dish & Transmitter Requires a Technician Much more Expensive Good Choice If Cable and/or DSL Are Not Available Wireless Local Broadband Recession had an impact Infrastructure Held it Back May be coming back Fiber Optic Infrastructure Very, Very Fast Offered only in Few Areas Equipment Compatibility Issues

5 Security Considerations Firewall Protection Connection Is Always On. Firewall Protection More Options Software Hardware - Router Protects your computer form the Internet Provider May Not Provide a Firewall What can Happen? Software Firewalls Firewall Choices Zone Alarm Free for Personal Use Commercial Products: Black Ice Norton Personal Firewall McAfee Personal Firewall Unsafe Firewalls Safe Firewalls

6 Security Check Good Security DSL Reports DSL Tools Using Broadband Software Updates and Maintenance Outside Your Area Radio On-demand Radio Online Education Supporting Instructional Activities Establishing a Web Presence

7 Home Computer Networking Connection Sharing Built into Windows XP Internet connection on the XP Computer Connect with two Ethernet Cards Use the Windows XP Networking Wizard Enable the Windows XP Firewall Website Development Broadband providers usually include web space Some providers supply development tools Other development options Ease of use: Microsoft FrontPage Features: Macromedia s Dreamweaver Needed features may not be supported Solution use a web server Web Hosting Some Capability May Come with Broadband Limited in Size and Scope May Not Support all Options Student Interaction Password Protection of Some Pages Front Page Extensions Scripts Commercial Web Hoisting Domain Names Registration of your own name If it is not taken Personalized address Selection Costs for registration and maintenance Under $25.00 per year Some providers offer them free of charge How Much Speed Why is My Connection Slow! Home network In house wiring line noise RF emissions The last mile Telco line The local provider - Hops to the backbone Internet backbone - ATT, Sprint, Worldcom Information provider server Number of users at any level

8 Book References Berg, G. (1998). MCSE networking essentials - what you need to succeed. New Riders Publishing. Froehlich, F., Sandler, G. & Elberfeld, J. (2000). A+ certification first look: Hardware. Rochester, NY: element K Press. Naugle M. (1994). The illustrated network book. New York, NY: Van Norstrand. Reinhold.Sasser, S. & McLaughlin, R. (1994). Fix your own LAN, second edition. New York, NY: MIS Press. Tanenbaum, A. (1996). Computer networks third edition. Upper Saddle River, NJ: Prentice Hall. DSL Reports DSL FAQ DSL Instillation Instructions DSL Tutorial Internet References DSL and Cable Recourse Guide Navas Cable Modem/DSL Tuning Guide Gibson Research Website