1. DSL Vs Cable Modem By Olubukola Adeyemi COSC 541

2.  What is DSL?  What is Cable Modem?  Comparison Cost Speed Security Reliability Installation  Conclusion Outline

3. What is DSL?  DSL provides a dedicated service over a single telephone line.  Hence no sharing of bandwidth among users.  Leverages existing copper infrastructure to provide symmetric bandwidth at speeds up to 1.5mbps

4. DSL Connection Inside carrier’s POP, a device called a DSL access multiplexer (DSLAM) aggregates multiple DSL subscriber lines and connects them to a larger carrier or to the Internet backbone

5. What is Cable Modem?  Cable Modems offer a dedicated service over a shared media.  Use coaxial cable to connect residences in neighborhoods to the cable company’s central office for relay to a distribution hub.  Provide up to 30Mbps downstream for sharing between 500-2,000 users.  Utilizes Ethernet LAN technology.

6. Cable Infrastructure

7. Comparison Cost DSLCable Slightly cheaper than DSL Reach thousands of subscribers with a single fiber cable DSL modem requires corresponding modem with service provider Involve extra accessories such as filters and dedicated modems Speed Faster than DSL Achieve networking speed of approximately 30mbps Most forms of DSL cannot reach 10mbps

8. Comparison Security DSLCable Shared medium subject to eavesdropping More secure than Cable Modem Not subject eavesdropping Reliability Malfunctioning CATV line will bring down all users on the line More reliable than Cable Modem Only a single user is affected when the DSL modem malfunctions

9. Comparison Installation DSLCable Almost everyone already has a phone service required for DSL Requires additional accessories such as filters and dedicated modems at both ends Requires cable television service as well Requires only cable modem

10. Conclusion  Choice of the faster, more reliable and safer internet access between DSL and Cable Modem has not been ascertained  Created a lot of consumer confusion  As many reasons to choose DSL as there are to choose Cable Modem  Consumers need to weigh the pros and cons of both technologies in their localities before making a purchase.

11. References  http://compnetworking.about.com/library/weekly/aa111200b.htm  http://westcoastinternet.net/support/whatis/dedicatedconnection/dsl/dslvscable  http://teledotcom.com/article/TEL20001009S0002  http://dslplanet.com/dsl_vs.cable.htm  http://salon.com/tech/feature/1999/09/23/cable_dsl/print.html  http://cnet.com/internet/0-3762-7-2643122.html