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Spanning Tree Protocol (STP)

Spanning Tree Protocol – Part 1: Understand STP...

One of the most used terms in network is LAN (Local Area Network). It’s a form of network that we encounter in our daily lives, at home, at work, study, and in various other areas of life. Unless w...

Network Cabling

Straight Thru UTP Cables

This article covers the commonly known Unshielded Twisted Pair (UTP) cable and shows how many pairs the UTP Cat5, Cat5e, Cat6 & Cat7 cables consists of, the colour coding they follow, the diffe...

Linux - Unix

Understanding, Administering Linux Groups and U...

In a multi-user environment like Linux, every file is owned by a user and a group. There can be others as well who may be allowed to work with the file. What this means is, as a user, you have all ...

Cisco Routers

Enabling & Configuring SSH on Cisco Routers. Re...

This article shows how to configure and setup SSH for remote management of Cisco IOS Routers. We’ll show you how to check if SSH is supported by your IOS version, how to enable it, generate an RSA ...

Linux - Unix

Working with Linux TCP/IP Network Configuration...

This article covers the main TCP/IP network configuration files used by Linux to configure various network services of the system such as IP Address, Default Gateway, Name servers - DNS, hostname a...

Network Cabling

Unshielded Twisted Pair (UTP) - CAT 1 to CAT5, ...

Unshielded Twisted Pair (UTP) cable is most certainly by far the most popular cable around the world. UTP cable is used not only for networking but also for the traditional telephone (UTP-Cat 1). T...

Windows Servers

Download Altaro Free VM Backup & Win a PlayStat...

We have some exciting news for you today! Altaro has launched a great contest in celebration of SysAdmin Day on 27th July! They will be giving away Amazon eGift Cards to the first 100 eligible en...

Cisco Switches

Cisco Catalyst 4500 Series Zero-Downtime IOS Up...

The Supervisor Engine is the heart of the Cisco Catalyst 4500 and 6500 series switches. It is the equivalent of an engine in a car. Every packet that enters or exits your switch passes through the ...

Routing

Link State Routing Protocols

Link State routing protocols do not view networks in terms of adjacent routers and hop counts, but they build a comprehensive view of the overall network which fully describes the all possible rout...

Network Fundamentals

The Importance of a Network Analyzer – Packet S...

Network Analyzers, also known as Packet Sniffers, are amongst the most popular network tools found inside any Network Engineer’s toolkit. A Network Analyzer allows users to capture network packets ...

Cisco Routers

Configuring Cisco Site to Site IPSec VPN with D...

This article serves as an extension to our popular Cisco VPN topics covered here on Firewall.cx. While we’ve covered Site to Site IPSec VPN Tunnel Between Cisco Routers (using static public IP addr...

Linux - Unix

Installing & Configuring Linux Webmin - Linux W...

For many engineers and administrators, maintaining a Linux system can be a daunting task, especially if there’s limited time or experience. Working in shell mode, editing files, restart...