Articles That Might Interest:

Ethernet Protocol, CSMA/CD, Collisions

Introduction to Ethernet Collisions

The word "Collision" shouldn't be any new news to people who work with networks everyday. If it is thought, don't worrie, that's why you are here. A collision is an event that happens on an Ethernet…

Domain Name System (DNS)

The DNS Protocol - Part 1: Introduction

If you ever wondered where DNS came from, this is your chance to find out ! The quick summary on DNS's history will also help you understand why DNS servers are run mostly on Linux and Unix-type syst…

VLAN Networks

VLAN Security - Making the Most of VLANs

It's easy to see why virtual LANs have become extremely popular on networks of all sizes. In practical terms, multiple VLANs are pretty much the same as having multiple separate physical networks wit…

Cisco CallManager-CCME

How To Stop CallManager (CUCM) 7, 8, 9, 10.5 with…

Cisco Unified CallManager (CUCM) and its Voice Gateway relies on the telecommunication provider (telco) to send the correct call details for every incoming call, to allow the system to correctly proc…

Cisco Routers

How To Configure Router On A Stick - 802.1q Trunk…

Router-on-a-stick is a term frequently used to describe a setup up that consists of a router and switch connected using one Ethernet link configured as an 802.1q trunk link. In this setup, the switch…

Windows Workstations (XP, 7, 8, 10, 11)

The Importance of Windows Hosts File - How to Use…

This article explains how the Windows operating system makes use of the popular Host file, where it is located for various operating systems, how it can be used to manipulate DNS lookups and redirect…

Linux - Unix

Advanced Linux Commands

Now that you're done learning some of the Basic Linux commands and how to use them to install Linux Software, it's time we showed you some of the other ways to work with Linux. Bear in mind that each…

Windows Servers

How to Install Desktop Icons (Computer, User’s Fi…

One of the first things IT Administrators and IT Managers notice after a fresh installation of Windows 2012 Server is that there are no Desktop Icons apart from the Recycle Bin. Desktop icons such as…

Windows Servers

Windows Server 2016 VM Backup with Altaro's New V…

Altaro has released Altaro VM Backup, a faster and lighter upgrade to its flagship Hyper-V and VMware backup solution, which now supports all Windows Server editions and includes several highly-reque…

VPN Services & Guides

Best VPN Review: StrongVPN. Download Speed Τest…

StrongVPN is one of the most popular VPN service around the world. With a presence in over 23 countries,+650 servers, cheap prices, Strong Encryption and blazing fast download speeds – it rightf…

The OSI Model

The OSI Model: Layer 3 - Network Layer

The Network layer is responsible for routing through an internetwork and for networking addressing. This means that the Network layer is responsible for transporting traffic between devices that are…

Cisco CallManager-CCME

Free Cisco IP Phone & ATA Firmware (SCCP & SIP)…

Firewall.cx readers can now download free Cisco firmware files for all Cisco IP Phones & Cisco ATA devices. Our new Cisco IP Phone & ATA Firmware Download section contains the latest SCCP (Sk…