Palo Alto Networks offers enterprise-wide Internet security (including security measures for mobile devices) to protect companies from breaches in their corporate networks. Its hardware and software security products, which account for most of company revenue, identify network traffic in detail and provide the ability to control access by user. In the past, a company could either allow its employees access to applications like  Oracle,  Skype, and  YouTube or not. But as more work is done online and in the cloud, that's not always practical. Palo Alto Networks designs its products to identify and manage threats rather than simply blocking access. It sells products outright as well as through a growing subscription business. Competitors include Juniper Networks and Cisco Systems.