GPOs allow an administrator to define the environment seen by workstations and servers in a domain, then rely on Windows 2000 to maintain that environment. In Windows 2000, the core protocol for distributed security is Kerberos. A client communicates with a Kerberos server's software running on a domain controller. A basic building block is the schema, a document that describes the hierarchical structure of an information set. This video looks at common messaging features, including semantics, content, and information flows.
Routers are a widely accepted method for interconnecting LANs.
A good starting point for working with Cisco routers is understanding some basic practical options. It probes issues related to bandwidth management, multimedia support and security. The forecast for cutting-edge technologies is threefold, encompassing Layer 3 switching, the emergence of gigabit Ethernet, and voice and data conversion.