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DSL and Cable Modems “Broadband Communication Technology” PowerPoint Presentation
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DSL and Cable Modems “Broadband Communication Technology”

DSL and Cable Modems “Broadband Communication Technology”

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DSL and Cable Modems “Broadband Communication Technology”

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  1. DSL and Cable Modems“Broadband Communication Technology” Murdoch, Tyler Nguyen, Hien Piltzer, Gabriel

  2. DSL Joseph Lechleider, developed ADSL (Asymmetry Digital Subscriber Line). John Cioffi, DMT (discrete multi-tone). Cable 1996-2002 higher capacity hybrid networks of coaxial and fiber optic built. Cable internet service offered in mid 90’s. Early disappointments over DSL reliability, security of cable internet, and broadband accessibility have largely been addressed. Brief History DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  3. All types of DSL service fall into one of two basic categories: SymmetricAsymmetric - SDSL -ADSL - SHDSL -RADSL - HDSL -VDSL Speed dependent on distance and signal frequency DSL Types DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  4. DSL Advantages / Disadvantages DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison Pros • High-speed download (up to 5 Mbps) • Business – Level DSL service offers guaranteed data rates. • Lets you surf the Net and gab on the same line at the same time Cons • Not every phone line will work; no easy way to find out if yours does. • Speed drops as you get further from phone company central office. • Not as widely available as Cable

  5. DSL has a slight advantage over Cable when it comes to security DSL in a given neighborhood do not appear as nodes on a LAN DSL uses dedicated rather than shared cabling. DSL Security DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  6. Less Expensive DSL has more variance between service package and price. DSL is said to be cheaper than Cable by up to 50%. PriceRange DSL likes to keep its price constant, high $20’s, low $30’s. Qwest DSL Residential $27/month - 256Kbps up/down $37/month – 7Mbps Down 896Kbps Up DSL Cost DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  7. Pros Speeds are not dependent on distance from central offices. Faster maximum speeds (8Mbps+) than DSL Sometimes cheaper than DSL, especially when bundled with TV services Cons May require professional installation. Line shared with others in neighborhood; speeds may vary May place limits on data downloads and uploads. Cable Advantages / Disadvantages DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  8. Uses a shared cable line to provide service to an entire neighborhood DOCSIS (Data Over Cable Service Interface Specification) Cable Security DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  9. Much more expensive than DSL. Cheaper if purchased bundled with other services: Television Voice phone Comcast Promotional Pricing - $20/month for 6 months $43/month after promotion period 6Mbps down Cable Cost DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  10. Both Cable and DSL use broadband communication technology DSL uses direct connection while cable uses shared connection Both Cable and DSL service providers put speed cap over to residential services Both Cable and DSL high speed internet connection are not available everywhere Typically Cable is faster then DSL and costs more than DSL Comparison DSL and Cable Modems • History • DSL • Types • Advantages • Disadvantages • Security • Cost • Cable • Types • Advantages • Disadvantages • Security • Cost • Conclusion • Comparison

  11. Questions?!?