Not a simple matter for ISPs to block botnet traffic

Legions of consumers are not taking reasonable steps to combat botnets, leading some some experts to suggest that ISPs should monitor broadband connections and block botnet-generated traffic.
A botnet is a network of servers or PCs that have been surreptitiously infected with malicious software for the purpose of generating Internet traffic without the owners’ knowledge or consent for some criminal purpose. Antivirus software offered by vendors such as McAfee, Microsoft or Symantec eliminate malicious software, but many consumers don’t utilize these products even when they are available for free.

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