A systems administrator who understands the server hardware and operating system is an essential part of a successful electronic commerce implementation. The systems administrator is responsible for the system’s reliable and secure operation. If the site operation is outsourced to a service provider, the service provider supplies this function. If the site is hosted by the company, it needs to devote at least one person to this job. In addition, the internal system administrator needs sufficient staff to maintain full 24/7 operation and site security. These network operations staff functions include load estimation and load monitoring, resolving network problems as they arise, designing and implementing fault-resistant technologies, and managing any network operations that arc outsourced to service providers or telephone companies.