
Chapter 3: Local Area, Metropolitan Area, and Wide Area Networks
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• Cable modem connections are only slightly more expensive than dialup
services, yet they provide broadband, always-on WAN access.
The downsides of using cable modems include the following:
• U.S. industrial and commercial business areas have limited cable modem
service availability.
• There is much variability in speed. As more users are added to this shared
WAN technology, lower speeds will be realized on a per-user basis.
• The potential for RF interference exists. Because cable is an RF network
system, it is vulnerable to interference from other RF systems.
• Security vulnerabilities ...