Intrusion detection is the next big opportunity, says Thompson. However, it is 10% the size of the antivirus market, and is therefore relatively small. First generation intrusion detection technology was very difficult to deploy and manage he notes. Now these customers, especially those in the financial space, want intrusion prevention technology. Migration from software to hardware is first driven by desire to improve line speed. Thompson talks about ways in which many companies are adopting this model. Symantec chose an alternate model because it is primarily a software company.