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Suggested Articles:

Ethernet Protocol, CSMA/CD, Collisions
Novell's Proprietary Frame Format was developed based on a preliminary release of the 802.3 specification. After Novell released its proprietary form…
Network Cabling
The 100Base-TX (sometimes referred to 100Base-T) cable was until 2010 perhaps the most popular cable around since it has actually replaced the older…
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…
Domain Name System (DNS)
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…

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Netflow Articles:

In this article, we explore the core principles of bandwidth management and examine how modern network monitoring technologies can assist in maintain…
SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ne…
Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, applic…
This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive int…

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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
We mentioned that Trunk Links are designed to pass frames (packets) from all VLANs, allowing us to connect multiple switches together and independently co…
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…
VLAN Networks
The previous article introduced the VTP protocol, we examined how it can be used within a network, to help manage VLANs and ease the administrative overhe…

Routing
IGRP (Interior Gateway Routing Protocol) is a Cisco proprietary distance-vector routing protocol used in enterprise networks to exchange routing informati…
Routing
This article explains how OSPF uses Link State Advertisement (LSA) to exchange information about the network topology between routers. When a router recei…
Routing
Hybrid routing protocols are a combination of distance-vector and link-state routing protocols, and are used to provide a more efficient and scalabl…
Routing
Open Shortest Path First (OSPF) is a popular routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working…

Windows Servers
FREE Hyper-V & VMware Virtualization Backup:  FREE for Firewall.cx readers for a Limited Time!  Download Now! Windows Server 2012 Editions…
Cisco Routers
Setting up a Windows VPDN connection is a required task in order to connect to a remote network. In previous articles we covered the set up of a VPDN - PP…
Cisco Routers
Configuration of ISDN interfaces on Cisco routers are usually considered a straight-forward process, however there are some details which can cause your I…
Cisco Wireless
This article covers the deployment of the Cisco WLC 9800-CL cloud-based controller on the VMware ESXi platform. We explain the CPU, RAM and storage requir…