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NAT and PAT: a complete explanation
Network address translation (NAT) is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device.
There...
802.1X Deployment Guide: Global configuration
In the previous article, I illustrated what are the dot1x and the benefits related to it. Just to remember that 802.1X authentication...
Access to the console via AUX port
Often in a network environment, it is needed to manage a router/switch via console, but what can you do if you don't have a...
How to upgrade a Cisco stack
One of the task of a good Network engineer is update the Cisco IOS to avoid bugs and to have new features; but what is the correct...
Troubleshoot a DMVPN phase 3 architecture
In the last article, I explained how to configure DMVPN phase3, but what are the most useful commands to troubleshoot this type of network...
How to trace MAC address
Traceroute is a tool for measuring the route path and transit times of packets across an Internet Protocol (IP) network.
Traceroute sends a sequence of...
802.1x: Introduction and general principles
IEEE 802.1X is an IEEE Standard for port-based Network Access Control to prevent unauthorized devices from gaining access to the network. It...
CoPP?! What is that?
Cisco Network Foundation Protection (NFP) is an umbrella strategy encompassing Cisco IOS Security features that provides the tools, technologies, and services that enable organizations...
Protecting against MAC flooding attack
In a typical MAC flooding attack, a switch is flooded with packets, each containing different source MAC addresses. The intention is to consume the...
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