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Network Fundamentals
In this section we are going to talk about the different ways a firewall can be set up. Depending on your needs, you can have a very simple firewall…
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 bi…
Network Cabling
Today, Serial and Parallel Direct Cable Connections are considered obsolete methods of transferring data between computers. The fact is that even USB…
Network Protocols
As discussed in the previous tutorial, we were made painfully aware that we were running out of IP address spaces and literally did in 2011. A new…

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Netflow Articles:

This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive int…
Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, applic…
In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows w…
SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ne…

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VLAN Networks
VTP (VLAN Trunking Protocol) pruning is a feature that is used in Cisco switches to reduce unnecessary traffic in VLAN (Virtual Local Area Network) trunks…
VLAN Networks
We hear about them everywhere, vendors around the world are constantly trying to push them into every type of network and as a result, the Local Area Netw…
VLAN Networks
If you've read our previous article The VLAN Concept - Introduction to VLANs  then you should feel comfortable with terms such as 'VLAN', 'Stati…
VLAN Networks
Deciding whether to use ISL or IEEE 802.1q to power your trunk links can be quite confusing if you cannot identify the advantages and disadvantages of eac…

Routing
This article covers basic OSPF concepts and operation. We explain how OSPF works, how OSPF tables are built on an OSPF-enabled router and their purpose (N…
Routing
We all understand that TCP/IP, IPX-SPX are protocols which are used in a Local Area Network (LAN) so computers can communicate between with each other and…
Routing
Enhanced Interior Gateway Routing Protocol (EIGRP), similar to IGRP, is a Cisco proprietary routing protocol that is used to exchange routing information…
Routing
We are going to analyse what happens when routing occurs on a network (IP routing process). When I was new to the networking area, I thought that all you…

Cisco Switches
This article focuses on VLAN Security and its implementation within the business network environment. We provide tips and Cisco CLI commands that will hel…
Windows Servers
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 Serv…
Palo Alto Networks
Our previous article explained how Palo Alto Firewalls make use of Security Zones to process and enforce security policies. This article will explain the…
Cisco Routers
When working with Cisco equipment that has multiple ip interfaces, a common problem engineers are faced with is trying to successfully tftp to or from the…