... several areas of particular specialization, such as e-mail servers like Lotus Notes or Microsoft Exchange, or database servers like Oracle or SQL Server Internet administrator Many people these days ... bits and bytes work The notion of binary, octal, decimal, and hexadecimal notation How basic PC hardware works, and how to install and replace PC peripheral components Two or three desktop operating ... addressing and routing and network hardware, including routers, bridges, gateways, switches, and firewalls Also, in large networks, administrators tend to specialize in certain areas, so you...