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Ethernet Protocol, CSMA/CD, Collisions

Differences Between Classic Ethernet And Fast E...

The two primary areas for concern when upgrading the network from 10Mbps to 100Mbps are cabling and hubs. As discussed on the Fast Ethernet Introdu...
IP Protocol

IP Protocol - Part 2: The Internet Protocol (IP...

This article examines the Internet Protocol (IP) and its position within the OSI Model. We take a look at the IP Header and all fields contained wi...
TCP - UDP Protocol Analysis

TCP Header Anaylsis - Section 3: TCP Header Len...

The third field under close examination is the TCP Header length. There really isn't that much to say about the Header length other than to explain...
Network Cabling

USB Direct Cable Connection, USB Versions, Spec...

Today, Serial and Parallel Direct Cable Connections are considered obsolete methods of transferring data between computers. The fact is that even U...

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Netflow Articles:

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 ...

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: 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...

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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

VLAN Tagging - Understanding VLANs Ethernet Frames

We mentioned that Trunk Links are designed to pass frames (packets) from all VLANs, allowing us to connect multiple switches together and independently ...
VLAN Networks

Static VLANs

VLANs are usually created by the network administrator, assigning each port of every switch to a VLAN. Depending on the network infrastructure and secur...
VLAN Networks

VLAN InterSwitch Link (ISL) Protocol Analysis

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 e...

Routing

OSPF - Part 6: OSPF LSA Types - Purpose and Function...

Our previous article explained the purpose of Link State Update (LSU) packets and examined the Link State Advertisement (LSA) information contained with...
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

Hybrid Routing Protocols - Advantages and Disadvanta...

Hybrid routing protocols are a combination of distance-vector and link-state routing protocols, and are used to provide a more efficient and scala...
Routing

Distance Vector Routing Protocols

Distance Vector routing protocols use frequent broadcasts (255.255.255.255 or FF:FF:FF:FF) of their entire routing table every 30 sec. on all their inte...

Windows Servers

Creating Windows Users and Groups with Windows 2003

In a Windows server environment, it is very important that only authenticated users are allowed to log in for security reasons. To fulfill this requirem...
Windows Servers

Windows Server 2016 – Hyper-V Virtualization Update

The new Hyper-V virtualization features offered by Windows Server 2016 are planning to make major changes in the virtualization market. From Nested Hype...
Virtualization & VM Backup

How to Fix VMware ESXi Virtual Machine 'Invalid Status'

In this article, we'll show you how to deal with VMs which are reported to have an Invalid Status as shown in the screenshot below. This is a commo...
SASE & SD-WAN Networks

Complete Guide to SD-WAN. Technology Benefits, SD-WA...

SD-WAN is the answer for enterprises and organizations seeking to consolidate network functions and services while at the same time simplify their WAN i...