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Palo Alto Networks
This article provides comprehensive guidance on the manual processes involved in downloading, uploading, and installing (import) any PAN-OS version on a Palo Alto Firewall. It details the steps for s…
Network Cabling
From the early PC days, Direct Cable Connection (DCC) was the most popular way to transfer data from one PC to another. Of course, it might seem a bit of an "old fashioned" way to transfer data these…
Routing
This article explains how OSPF uses Link State Advertisement (LSA) to exchange information about the network topology between routers. When a router receives an LSA, it is stored in the Link-State Da…
Cisco CallManager-CCME
Most engineers are aware that to download and install the latest Cisco CallManager Express (CCME) Graphical User Interface (GUI) files, Cisco requires a registered CCO account with the necessary priv…
Subnetting
So we have covered to some depth the subnetting topic, but there is still much to learn ! We are going to explain here the available subnet masks and analyse a Class C network, using a specific subne…
TCP - UDP Protocol Analysis
This article is an introduction to the 7-page TCP Header analysis section that follows. We briefly view each section of the TCP Header and then move on to its analysis using detailed colourful diagra…
Cisco Wireless
Cisco Aironet Access Points, just like most Cisco devices, provide a web interface from which we are able to configure the device. It is often we are presented with a number of options and settings…
Virtualization & VM Backup
SSH access to VMware’s ESXi server is by disabled by default however there are many reasons where SSH might be required. VMware and System administrators often find the need to perform advanced admin…
Virtualization & VM Backup
When considering your VM backup solution, key features such as deduplication are incredibly important. This is not simply from a cost perspective but also an operational one. While is it true that de…
Network Fundamentals
The first step in controlling broadcast and multicast traffic is to identify which devices are involved in a broadcast or multicast storm. The following protocols can send broadcast or multicast pack…
Linux - Unix
Vsftpd is a popular FTP server for Unix/Linux systems. For thoes unaware of the vsftpd ftp server, note that this is not just another ftp server, but a mature product that has been around for over 12…
Cisco Routers
Our previous article covered how to fix the Cisco Configuration Professional display/window problem where the CCP application is displayed in about one third of the browser’s window. Users looking fo…

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