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IP Protocol

IP Protocol - Part 3: IP Classes, Network & Hos...

This article explains the 'Network-ID' and 'Host-ID' concept found in IP addressing and subnetting. We analyse the structure of IP addresses and ne...
ICMP Protocol

ICMP Protocol - Part 6: Redirect Messages

The ICMP - Redirect Message is always sent from a gateway to the host and the example below will illustrate when this is used. Putting it simply (...
Network Fundamentals

Media Access Control - MAC Addresses

A MAC address, or Media Access Control address, is a unique identifier assigned to a network interface controller (NIC) for use as a network addr...
Network Fundamentals

Power over Ethernet - Understanding PoE Technol...

Power over Ethernet (PoE) was invented by PowerDsine back in 1997 and the first power injector (Midspan) was installed in 1998! Many manufacturespa...

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Netflow Articles:

Netflow: Monitor Bandwidth & Network Utilizatio...

Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, appl...

Netflow vs SNMP. Two Different Approaches to Ne...

SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ...

NetFlow Analyzer: Free Download, Step-by-Step I...

In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows...

Complete Guide to Netflow: How Netflow & its Co...

This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive i...

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VLAN Networks

VLANs - Access & Trunk Links

If you've read our previous article The VLAN Concept - Introduction to VLANs  then you should feel comfortable with terms such as 'VLAN', 'Sta...
VLAN Networks

VTP Protocol - In-Depth Analysis

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 over...
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...
VLAN Networks

Comparing Traditional Flat & VLAN Networks

Designing and building a network is not a simple job. VLANs are no exception to this rule, in fact they require a more sophisticated approach because of...

Routing

Interior Gateway Protocol - IGRP

IGRP (Interior Gateway Routing Protocol) is a Cisco proprietary distance-vector routing protocol used in enterprise networks to exchange routing informa...
Routing

OSPF - Part 5: Analysis of OSPF Link State Update (L...

This article explains how OSPF uses Link State Advertisement (LSA) to exchange information about the network topology between routers. When a router rec...
Routing

OSPF - Part 3: OSPF Adjacency & Neighbor Forming Pro...

This is the thrid article of our 6-part OSPF series (see below) that describes how OSPF routers perform neighbor relationship and adjacency. We’ll exami...
Routing

Routing Information Protocol - RIP

Routing Information Protocol (RIP) is a distance-vector routing protocol that is commonly used in small to medium-sized networks. It is one of the...

Cisco Routers

Understanding MPLS IP VPNs, Security Attacks and VPN...

What Are MPLS Networks? Multi-Protocol Label Switching (MPLS) networks are the next-generation of networks designed to allow customers create end-to-en...
Windows Servers

New Features in Windows Server 2012 - Why Upgrade t...

There is no doubt that Cloud Computing is hot topic these days. Innovations in cloud computing models have made every industry and company IT department...
Cisco Routers

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

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 ...
Cisco Routers

Cisco Router Basic ISDN Configuration

Configuration of ISDN interfaces on Cisco routers are usually considered a straight-forward process, however there are some details which can cause your...