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A final thought concerning the use of this technology is to understand the security concerns associated with the cable modem When the CATV systems are used, they are shared, high-speed Ethernet backbone access to the Internet or other connections One must be aware that on a shared cable, the PC is a peer to all others on the same cable, even though they are in physically different locations In a community of 500 connections, there will be many people who acquire the service from the CATV suppliers The CATV company installs according to the appropriate technology, not according to security parameters This is okay because they are merely providing the bandwidth to gain access It is the end user s responsibility to turn off all the leaks in the local system (the PC) By default, when you run Microsoft windows environment and the appropriate networking software, the shares on the PC are turned on The end user must therefore go in and turn them off This means that if the shared services are not turned off, a user down the street, or across the town, can double click on their network neighborhood icon and see all the other PCs connected to the cable Not only can they see the devices, they can double click on the PC and see the resources available on that PC From there when a remote device has double clicked on your PC, they can open your drives and see your files Unless some provisions have been taken to block this access, the intruder (used as a method of entry only) can read, write, edit, or delete your files Worse yet, while the intruder is on your system, you do not even know they are there Many users who have cable modem service from the cable companies are not aware of the risks Worse, the installation personnel on these systems do not totally understand or they forget to point out the risks Therefore, users leave the PC on 100% of the time (day and night), making access to their computers totally available The cable modem is available 100% of the time, making the computer a target for hackers and mischievous doers, without the permission or the knowledge of the penetrated computer owner Be aware that the risk is there and find out how to shut these open doors before leaving your computer on the network Do not assume that just because you shut your system off when you re not using it that you are protected because when you do log on, you are exposed, and the perpetrator can get on your system while you are on it, too! Technology is a wonderful thing, but it must be controlled.

10:

Whenever we look at the infrastructure of the Telecommunications networks, the issue of the last mile always crops up For over 120 years, the Telephone Companies installed their local wires from the Central Offices to the consumers door This local interconnection provides all the necessary access for a customer to dial up a voice call, or a data modem call The Telecommunications Acts being enacted around the world are privatizing and deregulating the Telephone Companies worldwide The local loop is coming under constant barrage as new competitors form up and enter the business The infrastructure a pair of telephone wires to everyone s home creates more legal suits and discussions than anything else in the industry As a secondary course of action, new providers are scurrying around looking for alternative methods to get to the consumer s door Some of the discussions have centered on the use of Cable TV and wireless access Now, a new twist has emerged! The use of the copper wires running from the electric utilities may provide an alternative route Pilot programs and tests are being conducted around the world to see if the electric (power) wires can be an alternate delivery method In Europe the results look favorable, which we shall see, but in North America, the studies have a long way to go A few years ago, the primary method of gaining new access was considered the realm of fiber optic cables to improve and provide high-speed communications In 1996, for example, the city of Turin launched a project to link 10 million homes in Italy with fiber in an overall project costing $62 Billion USD Alternatives to fiber based technologies now include:

Figure 7-24 The top half of this figure shows the Corporate member set of the Entity dimension, while the bottom half shows the ExpenseAccounts member set of the Account dimension

The clamp was first used on Namreko 3000 (Robot Wars, 1996) Other bots using the clamp include Complete Control, Tripulta Raptor, Spike IV, and Mantis A clamp bot features an actuated lifting arm, with an additional movable piece to act as a grabbing clamp that s capable of grasping the opposing robot and lifting it completely off the ground

ADSL has been the preferred [ 1 ] method of delivering high-speed communications to the business use on the existing copper cable plant Projections in the industry show that the ADSL growth curve from 1998 to 2002, as shown in Figure 15-1 , shows a high growth area

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Figure 15-1: Projected Use of xDSL technologies Looking at the three more popular solutions the use and growth figures are all quite impressive based on the use of data communications In Figure 15-2 is a comparison of the expected usage in 2002 for the three compared technologies ADSL, Cable modem and wireless technologies