Cisco Systems Chief Executive John Chambers says he's <A HREF="http://news.zdnet.com/2100-1009_22-6039940.html?tag=zdnn.alert">taking a "holistic" approach to security</A> and that corporations should view the network as an integrated system. The network has evolved from using "pinpoint" security technology to one that integrates a broad range of tools that communicate with each other, Chambers said Wednesday during a keynote speech at the RSA Conference 2006. That means security can be coordinated across the entire network, from the worker at a desk to the guts of the system.