Continuous access eliminates the downtime associated with dialing in via an analog modem. However, the convenience of a continuous connection does not come without a price. Unfortunately, that price is a lack of security. Continuous connections make computers vulnerable to hackers and snoopers. However, because broadband connections are continuous, they tend to use static IP addressing.
Cable modems have an additional vulnerability.
Using a cable modem is analogous to using a local area network, in which many users share common cabling. Several steps can be taken to address these security concerns. If the ISP does not provide dynamic IP addressing, the best protection is to disconnect the computer from the Internet when it is not in use. This can be accomplished either by disconnecting the cable or telephone line or by turning off the system. In addition, if the ISP does not provide encryption, a firewall, and antihacking software, the end user can purchase these for self-installation.