Brief, clear definition and description, by Romanian Cisco Partner, Datanet Systems.

O'Reilly & Associates guide to configuring for TCP/IP protocol family, user interface, configuring lines and interfaces, access lists, routing protocols, dial-on-demand routing, security, quick reference to commands to work with TCP/IP and lower-level protocols, many examples.

Brief, clear description, by OS and network consultants, Frigate Networks.

Root page for Cisco's network OS: sophisticated, cost-effective, dynamically upgradable, internetwork optimized, router-centric; provides common IP fabric, functionality and command-line interface (CLI) across a network.

A network management application giving experts a visual configuration editor and specialized terminal emulation for any Cisco IOS based devices, such as routers and switches.