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Gain insight into Cisco Unified Collaboration infrastructure solutions for using phone, instant messaging and videoconferencing systems to connect internal and external users.

Get an overview of Cisco Collaboration Systems Release (CSR) 10.6 with a focus on Cisco Unified Communications Manager (CUCM) supported features.

This paper helps you prepare to pass the latest version of the Cisco Certified Network Associate (CCNA) Routing and Switching exam.

Learn how virtual PortChannels (vPCs) manage multicast traffic.

Explore the ways in which network engineers design, implement, and troubleshoot Cisco Access Control Lists (ACLs), which is a topic that appears in the CCNA examination.

There are few (if any) networks in the world that do not implement NAT/PAT for IP version 4. IP version 6 will eliminate a lot of the need for NAT. Even though NAT is usually implemented as a firewalling function, it can be important on Cisco routers as well. From this, it is simple to conclude that understanding, designing, implementing, and troubleshooting NAT is a required skill for network engineers. The topic also appears in the CCNA examination in multiple questions and simulations.

This paper focuses on the packet delivery process when two devices are locally connected. Definitions are first, and then there is a detailed look at the actual process of exchanging data.

This paper focuses on the packet delivery process when two devices are remotely connected. Definitions are first, followed by a detailed look at the actual process of exchanging data.

This white paper addresses Virtual Routing and Forwarding (VRF), which is a Layer 3 isolation mechanism for routing protocols.

Learn how to build and manage a Snort system using open source tools, plug-ins, as well as the Snort rule language to help manage, tune, and deliver feedback on suspicious network activity.