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Network Cabling

Fibre Optic Cables - Single-Mode Multi-Mode - A...

In this article, we'll talk about Fiber optic cables and how it has changed the design and implementation of network infrastructures, providing hig...
Ethernet Protocol, CSMA/CD, Collisions

Early Ethernet Collisions

In this example, we will refer to an imaginary Ethernet network consisting of Stations A and B and any number of other stations. The status of the ...
IP Protocol

IP Protocol - Part 1: Binary & The Internet Pro...

To understand the Internet Protocol, we need to learn and understand Binary. It is very important to know and understand Binary because part of the...
Network Cabling

Unshielded Twisted Pair (UTP) - CAT 1 to CAT5, ...

Unshielded Twisted Pair (UTP) cable is most certainly by far the most popular cable around the world. UTP cable is used not only for networking but...

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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 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...

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 ...

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VLAN Networks

VLANs - IEEE 802.1q Trunk Link Protocol Analysis

While the VLAN Tagging article briefly covered the IEEE 802.1q protocol this article will continue building upon it by further analyzing the IEEE 802.1q...
VLAN Networks

VTP Pruning

VTP (VLAN Trunking Protocol) pruning is a feature that is used in Cisco switches to reduce unnecessary traffic in VLAN (Virtual Local Area Network) trun...
VLAN Networks

Dynamic VLANs

Dynamic VLANs were introduced to grant the flexibility and complexity(!) that Static VLANs did not provide. Dynamic VLANs are quite rare because of thei...
VLAN Networks

VTP Introduction & Modes

The invention of VLANs was very much welcomed by all engineers and administrators, allowing them to extend, redesign and segment their existing network ...

Routing

OSPF - Part 4: OSPF Neighbor States – OSPF Neighbor ...

This is the third article of our OSPF series which analyzes the different OSPF States routers go through during the OSPF discovery and neighbor forming ...
Routing

Introduction to Routing Protocols

Distance Vector, Link State RIP, IGRP, EIGRP, OSPF Routing protocols were created for routers. These protocols have been designed to allow the exchan...
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 2: How OSPF Protocol Works & Basic Conce...

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 ...

Virtualization & VM Backup

World Backup Day with Free Amazon Voucher and Prizes...

Celebrate World Backup Day and WIN with Altaro! We all remember how grateful we were to have backup software when facing so many data loss mishaps and...
Cisco Routers

Installing Security Device Manager (SDM) on a Cisco ...

For years now, Cisco has been developing its Security Device Manager (SDM) software. This web-based software is designed to help the less experienced us...
Cisco Switches

Complete Guide to DHCP Snooping, How it Works, Conce...

This article covers popular Layer 2 & Layer 3 network attacks with a focus on DHCP Starvation Attacks, Man-in-the-Middle attacks, unintentional rogu...
Cisco Routers

How To Configure Windows VPDN (PPTP) Dialup Connection

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 - ...